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John Knaff

John Knaff earned a B.S. in Meteorology (1989) from Texas A&M University, and a MS (1992) and PhD (1997) in Atmospheric Science from Colorado State University. He was a post-doctoral researcher in the Department of Atmospheric Science at Colorado State University (1997) and a post-doctoral Fellow at the Cooperative Institute for Research in the Atmosphere at Colorado State University (1997-1999). In 1999 he took a Research Scientist position at the Cooperative Institute for Research in the Atmosphere. He joined NOAA in 2006 as a Meteorologist in the NESDIS Regional and Mesoscale Meteorology Branch located in Fort Collins, Colorado.

His PhD concentrated on tropical climate variability including El Nino/Southern Oscillation, monsoons, tropical cyclones and large-scale Atlantic climatology. Since that time, most of his research has dealt with observational aspects of hurricane structure and intensity variations and prediction. That work has led to the development of many forecast applications that have been transferred to operations at the NESDIS, the National Hurricane Center, the Joint Typhoon Warning Center, and tropical cyclone warning centers worldwide. These efforts have led to many awards including the NOAA David Johnson Award (2004), Department of Commerce Bronze Medals (2007, 2010, 2012), the Colorado Governor's Award for High Impact Research in (team member, 2012) and recognition for the best paper in STAR (2016).

Current applied research interests are focused on the utilization of satellite and other observations to improve scientific understanding, diagnosis and forecasting capabilities of tropical cyclone genesis and structure change, the development and documentation of operational tropical cyclone forecasting techniques, the transfer of such techniques to the operational setting. Existing scientific endeavors have been aimed at understanding the various types of tropical vorticies their formation, maintenance, and lifecycles and the occasional foray into inter-annual climate variations. Since 1991, he has published more than 80 articles on tropical cyclones, forecast techniques, mesoscale meteorology and tropical climatology in the refereed literature.

Publications

Refereed Publications

 

Goni, G. J, J. A. Knaff, and I - I. Lin, 2016: [The Tropics] Tropical Cyclone Heat Content [in "State of the Climate in 2015"]. Bull. Amer. Meteor. Soc., 97(8), S120-S123.

Knaff, J. A., C. J. Slocum, K. D. Musgrave, C. R. Sampson, and B. R. Strahl, 2016: Using routinely available information to estimate tropical cyclone wind structure. Mon. Wea. Rev., 144(4), 1233-1247. DOI: http://dx.doi.org/10.1175/MWR-D-15-0267.1

Folmer, M., M. DeMaria, R. Ferraro, J. Beven, M. Brennan, J. Daniels, R. Kuligowski, H. Meng, S. Rudlosky, L. Zhao, J. A. Knaff, S. Kusselson, S. D. Miller, T. Schmit, C. Velden, and B. Zavodsky, 2015: Satellite tools to monitor and predict Hurricane Sandy (2012): Current and emerging products. Atmospheric Research166, 165-181.

Goni, G. J., J. A. Knaff, I-I. Lin, 2015: [The Tropics] Tropical Cyclone Heat Content [in "State of the Climate in 2014"]. Bull. Amer. Meteor. Soc., 96(7), S121-S122.

Kaplan, J.,  C. M. Rozoff, M. DeMaria, C. R. Sampson, J. P. Kossin, C. S. Velden, J. J. Cione, J. P. Dunion, J. A. Knaff, J. A. Zhang, J. F. Dostalek, J. D. Hawkins, T. F. Lee, and J. E. Solbrig, 2015: Evaluating environmental impacts on tropical cyclone rapid intensification predictability utilizing statistical models. Wea. Forecasting30, 1374-1396.  doi: http://dx.doi.org/10.1175/WAF-D-15-0032.1 PDF

Knaff, J. A., S. P. Longmore, R. T. DeMaria, and D. A. Molenar, 2015: Improved Tropical-Cyclone Flight-Level Wind Estimates Using Routine Infrared Satellite Reconnaissance. Journal of Applied Meteorology and Climatology, 54(2), 463-478. doi: http://dx.doi.org/10.1175/JAMC-D-14-0112.1 PDF

Knaff, J. A., S. P. Longmore, and D. A. Molenar, 2015: CORRIGENDUM. J. Climate, 28(21), 8648-8651. doi: http://dx.doi.org/10.1175/JCLI-D-15-0610.1 PDF

Knaff, J. A. and C. R. Sampson, 2015: After a decade are atlantic tropical cyclone gale force wind radii forecasts now skillful? Wea. Forecasting, 30, 702-709. doi: http://dx.doi.org/10.1175/WAF-D-14-00149.1 PDF

Longmore, S. P., S. D. Miller, D. E. Bikos, D. T. Lindsey, E. J. Szoke, D. A. Molenar, D. W. Hillger, R. L. Brummer, J. A. Knaff, 2015: An Automated Mobile Phone Photo Relay and Display Concept Applicable to Operational Severe Weather Monitoring. Journal of Atmospheric and Oceanic Technology. 32, 1356-1363. doi: http://dx.doi.org/10.1175/JTECH-D-14-00230.1.

Sampson C. R, and J. A. Knaff, 2015: A consensus forecast for tropical cyclone gale wind radii. Wea. Forecasting30, 1397-1403.  doi: http://dx.doi.org/10.1175/WAF-D-15-0009.1 PDF

Apodaca, K.,  M. Zupanski, M. DeMaria, J. A. Knaff, and L. D Grasso, 2014: Development of a hybrid variational-ensemble data assimilation technique for observed lightning tested in a mesoscale model. Nonlin. Processes Geophys., 21, 1027-1041, doi:10.5194/npg-21-1027-2014. PDF

Balaguru K., S. Taraphdar, L. R. Leung, G. R. Foltz, and J. A. Knaff, 2014:  Cyclone-cyclone interactions through the ocean pathway.  Geophy. Res. Let., 41(19), 6855–6862. DOI: 10.1002/2014GL061489 PDF

DeMaria, M., C. R. Sampson, J. A. Knaff and K. D. Musgrave, 2014: Is tropical cyclone intensity guidance improving?  Bull. Amer. Meteor. Soc., 95, 387-398. 

Goni, G. J, J. A. Knaff, and I - I. Lin, 2014: [The Tropics] Tropical Cyclone Heat Content [in "State of the Climate in 2013"]. Bull. Amer. Meteor. Soc., 95(7), S99-S100.

Knaff, J. A., S. P. Longmore, D. A. Molenar, 2014: An Objective Satellite-Based Tropical Cyclone Size Climatology. J. Climate27, 455–476. doi: http://dx.doi.org/10.1175/JCLI-D-13-00096.1 PDF

Ali, M., N. Sharma, J. A. Knaff, 2013: A Soft-computing Cyclone Intensity Prediction Scheme for the Western North Pacific Ocean. Atmos.Sc.Ltrs., 14(3), 182-192.

DeMaria, M., J. A. Knaff, M. Brennan, D. Brown, R. Knabb, R. T. DeMaria, A. B. Schumacher, C. Lauer, D. Roberts, C. R. Sampson, P. Santos, D. Sharp, and K. Winters, 2013: Improvements to the operational tropical cyclone wind speed probability model. Wea. Forecasting, 28, 586-602. doi: http://dx.doi.org/10.1175/WAF-D-12-00116.1

DeMaria M, J. A. Knaff, R. M. Zehr, 2013: Assessing hurricane intensity using satellites. Satellite-based applications to climate change. J. J. Qu, A. Powell, and M.V.K. Sivakumar, Eds, Springer, New York, pp 151-163. doi: http://dx.doi.org/10.1007/978-94-007-5872-8_10 PDF

Goni, G. J, J. A. Knaff, I - I. Lin, 2013: [The Tropics] Tropical Cyclone Heat Content [in "State of the Climate in 2012"]. Bull. Amer. Meteor. Soc., 94(8), S99-S100.

Knaff, J. A., M. DeMaria, C. R. Sampson, J. E. Peak, J. Cummings, W. H. Schubert, 2013: Upper oceanic energy response to tropical cyclone passage. J. Climate 26, 2631-2650. doi: http://dx.doi.org/10.1175/JCLI-D-12-00038.1 PDF

Knapp, K. R., J. A. Knaff, C. R. Sampson, G. Riggio, and A. Schnapp, 2013: A pressure-based analysis of the historical western North Pacific tropical cyclone intensity record. Mon. Wea. Rev. 141, 2611-2631. doi: http://dx.doi.org/10.1175/MWR-D-12-00323.1

Lin, I. - I., G. J. Goni, J. A. Knaff, C. Forbes, M.M. Ali, 2013: Tropical cyclone heat potential for tropical cyclone intensity forecasting and its impact on storm surge. Journal of Natural Hazards.66, 1481-1500. doi:10.1007/s11069-012-0214-5.

Sharma, N., M. M. Ali, J. A. Knaff, and  P. Chand, 2013: A soft-computing cyclone intensity prediction scheme for the Western North Pacific Ocean. Atmosph. Sci. Lett., 14,187–192. doi: 10.1002/asl2.438

Sitkowski, M., J. P. Kossin, C. M. Rozoff, and J. A. Knaff, 2013: Hurricane eyewall replacement cycle thermodynamics and the relict inner eyewall circulation. Mon. Wea. Rev.140, 4035–4045. doi: http://dx.doi.org/10.1175/MWR-D-11-00349.1

Zhang, M., M. Zupanski, M. - J. Kim, J. A. Knaff, 2013:  Assimilating AMSU-A Radiances in the TC Core Area with NOAA Operational HWRF (2011) and a Hybrid Data Assimilation System: Danielle (2010). Mon. Wea. Rev.141(11), 3889–3907.  doi: http://dx.doi.org/10.1175/MWR-D-12-00340.1

DeMaria, M., R. T. DeMaria, J. A. Knaff and D. A. Molenar, 2012: Tropical cyclone lighting and rapid intensity change. Mon. Wea. Rev., 140, 1828-1842. 

Goni, G. J., J. A. Knaff, and I - I Lin, 2012: [The Tropics] Tropical cyclone heat potential [in “State of the Climate in 2011”]. Bull. Amer. Meteor. Soc., 93(7), S114-S116.

Sampson, C..R., A..B. Schumacher, J. A. Knaff, M. DeMaria, E. M. Fukada, C. A. Sisko, D. P. Roberts, K. A. Winters, H. M. Wilson , 2012: Objective guidance for use in setting tropical cyclone conditions of readiness. Wea. Forecasting27(4), 1052–1060. 

Vigh, J. L., J. A. Knaff, W. H. Schubert, 2012: A climatology of hurricane eye formation. Mon. Wea. Rev., 140(5), 1405–1426. doi: http://dx.doi.org/10.1175/MWR-D-11-00108.1 PDF

Goni, G. J., J. A. Knaff, and I .- I. Lin, 2011: [The Tropics] TC heat potential (TCHP) [in “State of the Climate in 2010”]. Bull. Amer. Meteor. Soc., 92(6), S132-S134.

Knaff, J. A., M. DeMaria, D. A. Molenar, C. R. Sampson and M. G. Seybold, 2011: An automated, objective, multi-satellite platform tropical cyclone surface wind analysis. J. of Applied Meteorology and Climatology. 50(10), 2149-2166. doi: 10.1175/2011JAMC2673.1

Knaff, J. A., C. R. Sampson, P. J. Fitzpatrick, Y. Jin, and C. M. Hill, 2011: Simple Diagnosis of Tropical Cyclone Structure via Pressure Gradients. Weather and Forecasting. 26(6), 1020-1031. DOI: 10.1175/WAF-D-11-00013.1

Sampson, C. R., J. Kaplan, J. A. Knaff, M. DeMaria, and C. Sisko, 2011: A deterministic rapid intensification aid. Wea. Forecasting, 26(4), 579-585.

Goni, G. J., J. A. Knaff, and I-I Lin, 2010: TC heat potential (TCHP) [in “State of the Climate in 2009”]. Bull. Amer. Meteor. Soc., 91(6), S99-S100.

Kaplan, J., M. DeMaria, and J A. Knaff, 2010: A revised tropical cyclone rapid intensification index for the Atlantic and east Pacific basins. Wea. Forecasting, 25, 220-241.

Knaff, J. A., D. P. Brown, J. Courtney, G. M. Gallina, J. L. Beven II, 2010:   An Evaluation of Dvorak Technique-Based Tropical Cyclone Intensity Estimates.  Wea. Forecasting, 25(5), 1362-1379

Knaff, J. A., and B. A. Harper, 2010: Tropical cyclone surface wind structure and wind-pressure relationships. Keynote #3, WMO International Workshop on Tropical Cyclones VII, La Reunion, France, 15-20 November, 35pp. PDF

Courtney, J., and J. A. Knaff, 2009: Adapting the Knaff and Zehr Wind-Pressure Relationship for operational use in Tropical Cyclone Warning Centres. Australian Meteorological and Oceanographic Journal, 58(3), 167-179.

DeMaria, M., J. A. Knaff, R. Knabb, C. Lauer, C. R. Sampson, R. T. DeMaria, 2009:  A New Method for Estimating Tropical Cyclone Wind Speed Probabilities. Weather and Forecasting. 24(6), 1573–1591. PDF

Goni, G., M. DeMaria, J. A. Knaff, C. R. Sampson, I. Ginis, F. Bringas, A. Mavume, C. Lauer, I. - I. Lin, M. M. Ali, P. Sandery, S. Ramos-Buarque, K. Kang, A. Mehra, E. Chassignet, and G. Halliwell, 2009: Applications of Satellite-Derived Ocean Measurements to Tropical Cyclone Intensity Forecasting, Oceanography, 22(3), 190-197.

Goni, G. J, and J. A. Knaff, 2009:  Tropical cyclone heat potential [in “State of the Climate in 2008”], Bull. Amer. Met. Soc., 90(8), S54-S57.

Knaff, J. A.,  2009.   Revisiting the maximum intensity of recurving tropical cyclones.   Int. J. Climatology, 29, 827-837. [also available on-line at http://www3.interscience.wiley.com/journal/4735/home]

Knaff, J. A., and C. R. Sampson, 2009: Southern Hemisphere Tropical Cyclone Intensity Forecast Methods Used at the Joint Typhoon Warning Center, Part I:  Control Forecasts Based on Climatology and Persistence. Australian Meteorological and Oceanographic Journal, 58(1), 1-7.

Knaff, J. A., and C. R. Sampson, 2009: Southern Hemisphere Tropical Cyclone Intensity Forecast Methods Used at the Joint Typhoon Warning Center, Part II:   Statistical – Dynamical Forecasts.  Australian Meteorological and Oceanographic Journal, 58(1), 9-18.

Sampson, C. R. and J. A. Knaff, 2009: Southern Hemisphere Tropical Cyclone Intensity Forecast Methods Used at the Joint Typhoon Warning Center, Part III:   Statistical – Consensus Forecasts.  Australian Meteorological and Oceanographic Journal, 58:1, 19-27.

Schumacher, A. B., M. DeMaria and J. A. Knaff, 2009: Objective Estimation of the 24-Hour Probability of Tropical Cyclone Formation, Wea. Forecasting, 24, 456-471.

Knaff, J. A., T. A. Cram, A. B. Schumacher, J. P. Kossin, and M. DeMaria, 2008:  Objective Identification of Annular Hurricanes. Wea. Forecasting, 17-28.

Knaff, J. A. and R. M. Zehr, 2008:  Reply. Weather and Forecasting, 23(4), 762-770.   (cf  of the Comment)

Sampson, C. R., J. L. Franklin, J. A. Knaff, and M. DeMaria, 2008: Experiments with a Simple Tropical Cyclone Intensity Consensus. Weather and Forecasting, 23, 304–312.

DeMaria, M., J. A. Knaff and C. R. Sampson, 2007: Evaluation of long-term trend in tropical cyclone intensity forecasts. Meteor. Atmos Phy., 97, 19-28. 

Knaff, J. A., C. R. Sampson, M. DeMaria, T. P. Marchok, J. M. Gross, and C. J. McAdie, 2007: Statistical Tropical Cyclone Wind Radii Prediction Using Climatology and Persistence. Wea. Forecasting, 22(4), 781–791. 

Knaff, J. A., and R. M. Zehr, 2007: Reexamination of Tropical Cyclone Pressure Wind Relationships. Wea Forecasting, 22(1), 71–88.

Kossin, J. P., J. A. Knaff, H. I. Berger, D. C. Herndon, T. A. Cram, C. S. Velden, R. J. Murnane, and J. D. Hawkins, 2007: Estimating hurricane wind structure in the absence of aircraft reconnaissance. Wea. Forecasting, 22(1), 89–101.

Sampson, C. R., J. A. Knaff and E. M. Fukada, 2007: Operational Evaluation of a Selective Consensus in the Western North Pacific Basin. Wea. Forecasting, 22, 671-675.

Zehr, R. M., and J. A. Knaff, 2007:  Atlantic major hurricanes, 1995-2005 – Characteristics based on best track, aircraft, and IR images.  J. of Climate, 20, 5865-5888.

Bessho, K., M. DeMaria, J. A. Knaff, 2006:  Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounder Unit (AMSU): Application to Surface Wind Analysis.  J. of Applied Meteorology. 45(3), 399 - 415.

Chen, S. S., J. A. Knaff, and F. D. Marks, Jr., 2006: Effects of Vertical Wind Shear and Storm Motion Tropical Cyclone Rainfall Asymmetries Deduced from TRMM. Monthly Weather Review. 3190-3208.

DeMaria, M,. J. A. Knaff, J. Kaplan. 2006: On the Decay of Tropical Cyclone Winds Crossing Narrow Landmasses. Journal of Applied Meteorology and Climatology. 45(3), 491–499.

Demuth, J. L., M. DeMaria, and J. A. Knaff, 2006:  Improvement of Advanced Microwave Sounding Unit Tropical Cyclone Intensity and Size Estimation Algorithms, Journal of Applied Meteorology and Climatology, 45(11), 1573–1581.

Landsea, C. W., B. A. Harper, K. Hoarau, and J. A. Knaff, 2006:  Can we detect trends in extreme tropical cyclones?.  Science, 313, 452-454.

Lindsey, D. T., D. W. Hillger, L. D. Grasso, J. A. Knaff, and J. F. Dostalek, 2006: GOES Climatology and Analysis of Thunderstorms with Enhanced 3.9 µm Reflectivity. Mon. Wea. Rev., 134(9), 2342–2353.

Mueller, K. J., M. DeMaria, J. A. Knaff, T.H. Vonder Haar:, 2006: Objective Estimation of Tropical Cyclone Wind Structure from Infrared Satellite Data. Wea Forecasting, 21(6), 990–1005.

DeMaria, M., M. Mainelli, L. K. Shay, J. A. Knaff, J. Kaplan, 2005:  Further Improvement to the Statistical Hurricane Intensity Prediction Scheme (SHIPS).  Wea. and Forecasting, 20(4 ), 531–543.

Ferraro, R. R., P. Pellegrino, M. Turk, W. Chen, S. Qui, R. J. Kuligowski, S. J. Kusselson, A. Irving, S. Q. Kidder, J. A. Knaff, 2005:  The Tropical Rainfall Potential (TRaP) Technique. Part 2: Validation.  Weather and Forecasting, 20(4), 465-475.

Kidder, S. Q., S. J. Kusselson, J. A. Knaff, R. R. Ferraro, R. J. Kuligowski, M. Turk, 2005:  The Tropical Rainfall Potential (TRaP) Technique. Part 1: Description and Examples.  Weather and Forecasting, 20(4), 456-464.

Knaff, J. A., C. R. Sampson, M. DeMaria, 2005:  An operational statisical typhoon intensity prediction scheme for the Western North Pacific.  Weather and Forecasting, 20(4), 688–699.

Demuth, J. L., M. DeMaria, J. A. Knaff, and T. H. Vonder Haar, 2004: Validation of an advanced microwave sounder unit (AMSU) tropical cyclone intensity and size estimation algorithm, J. App. Met., 43, 282-296. PDF

Knaff, J. A. , S. A. Seseske, M. DeMaria, J. L. Demuth, 2004: On the Influences of Vertical Wind Shear on Symmetric Tropical Cyclone Structure Derived from AMSU. Mon. Wea. Rev., 132, 2503-2510. PDF

Chase, T. N., J. A. Knaff, R. A. Pielke, and E. Kalnay, 2003:  Changes in Global Monsoon Circulations Since 1950. Natural Hazards, 29, 229-254. PDF

Knaff, J. A., M. DeMaria, C.R. Sampson, and J. M. Gross, 2003: Statistical, Five-Day Tropical Cyclone Intensity Forecasts Derived from Climatology and Persistence. Wea. Forecasting, 18(2), 80-92. PDF

Knaff, J. A., J. P. Kossin, and M. DeMaria, 2003: Annular Hurricanes. Wea. Forecasting, 18(2), 204-223. PDF

Weaver, J. F., J. A. Knaff, D. E. Bikos, G. Wade, and J. M. Daniels, 2002:  Reply.  Wea. Forecasting, 17(5), 1118-1127. PDF

Weaver, J. F., J. A. Knaff, D. E. Bikos, G. Wade, and J. M. Daniels, 2002:  Satellite observations of a severe supercell thunderstorm on 24 July 2000 taken during the GOES-11 Science Test. Wea. Forecasting,17(1), 124-138. PDF

DeMaria, M., J. A. Knaff, and B. H. Connell, 2001:  A tropical cyclone genesis parameter for the Tropical Atlantic. Wea. Forecasting, 16(2), 219-233. PDF

Pielke, R. A., T. N. Chase, T. G. F. Kittel, J. A. Knaff, and J. Eastman, 2001: Analysis of 200 mb zonal wind for the period 1958-1997. J. Geophys. Res.,106 (D21): 27287-27290. PDF

Chase, T. N., R. A. Pielke, J. A. Knaff, T. G. G. Kittel, and J. L. Eastman, 2000: A comparison of Regional Trends in 1979-1997 depth-averaged tropospheric temperatures.  Int. J. Climatol., 20, 503-518. PDF

Knaff, J. A., and J. W. Weaver, 2000: A mesoscale low-level thunderstorm outflow boundary associated with Hurricane Luis. (Picture of the Month), Mon. Wea. Rev., 128(9), 3352-3355. PDF

Knaff, J. A., R. M. Zehr, M. D. Goldberg, and S. Q. Kidder, 2000:  An example of temperature structure differences in two cyclone systems derived from the Advance Microwave Sounder Unit. Wea. Forecasting, 15(4),476-483. PDF

Landsea, C. W., and J. A. Knaff, 2000:  How much skill was there in forecasting the great 1997-98 El Nino?, Bull. Amer. Meteor. Soc., 2107-2119. PDF

Landsea, C. W., R. A. Pielke, Jr., A. M. Mestas-Nunez, and J. K. Knaff, 1999: Atlantic basin hurricanes: Indices of climatic changes.  Climatic Change, 42, 89-129. PDF

Knaff, J. A., 1998: Predicting summertime Caribbean pressure in early April. Wea. Forecasting, 13(3), 740-752. PDF

Pielke, R. A., J. Eastman, T. N. Chase, J. A. Knaff, and T. G. F. Kittel, 1998: 1973-1996 trends in depth-averaged tropospheric temperature, J. of Geophysical Research, 103:D14, 16,927-16,934. PDF

Pielke, R. A., J. Eastman, T. N. Chase, J. A. Knaff, and T. G. F. Kittel, 1998: Correction to: 1973-1996 trends in depth-averaged tropospheric temperature, by R.A. Pielke, Sr et al.. J. of Geophysical Research, 103:D22, 28, 909-911. PDF

Knaff, J. A., 1997: Implications of summertime sea level pressure anomalies in the tropical Atlantic region.  J. Climate, 10, 789-804. PDF

Knaff, J. A., and C. W. Landsea, 1997: An El Nino—Southern Oscillation climatology and persistence (CLIPER) forecasting scheme. Wea. Forecasting, 12, 633-652. PDF

Fitzpatrick, P., J. A. Knaff, C. W. Landsea, and S. Finley, 1995: Documentation of a systematic bias in the aviation model's forecast of the Atlantic tropical upper tropospheric trough: Implications for tropical cyclone forecasting. Wea. Forecasting, 10, 433-446. PDF

Gray, W. M., J. D. Sheaffer, and J. A. Knaff, 1992: Hypothesized Mechanism for Stratospheric QBO Influence on ENSO Variability. Geophys. Res. Let., 19(2), 107-110. PDF

Gray, W. M., J. D. Sheaffer, and J. A. Knaff, 1992: Influence of the Stratospheric QBO on ENSO Variability.  J. Meteor. Soc. of Japan, 70, 975-995. PDF

Conference Publications/Presentations and Informal Publications

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Bender, M., M. Morin, K. Emmanuel, J. A. Knaff, C. R. Sampson, I. Ginis and B. Thomas, 2016: Impact of Storm structure and the environmental conditions in the the Rapid Intensification of Hurricanes Katrina and Patricia. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.  

Chirokova, G., M. DeMaria, J. F. Dostalek, R. T. DeMaria, J. A. Knaff, K. D. Musgrave, and J. Beven, 2016: Evaluation of the ATMS-MIRS and NUCAPS retrievals in the vicinity of the Tropical Cyclones. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.  

Chirokova, G., J. A. Knaff, R. T. DeMaria, M. DeMaria, and J. Beven, 2016: Use of the VIIRS Day-Night Band Imagery for Tropical Cyclone Analysis and Forecasting. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico. (poster)

DeMaria, M., G. Chirokova, J. A. Knaff, K. D. Musgrave, and M. Bozeman, 2016: Recent Improvements to NHC's Statistical-Dynamical Tropical Cyclone Intensity Prediction Models. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.  

DeMaria, R. T., J. A. Knaff, G. Chirokova, and J. Beven, 2016: Automated Objective Tropical Cyclone Eye Detection. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.  

Dostalek, J. F., G. Chirokova, J. A. Knaff, S. P. Longmore, R. T. DeMaria, A. B. Schumacher, and C. R. Sampson, 2016: Recent and Future Updates to the Operational, Satellite-Based Tropical Cyclone Products Produced at the Cooperative Institute for Research in the Atmosphere. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.  

Knaff, J. A., 2016: Key NESDIS Research and R2O Intended to Improve Hurricane Forecasts. 70th Interdepartmental Hurricane Conference, 14-17 March, Miami, FL.

Knaff, J. A., T. Birner, G. Chirokova, L. Rivoire, and R. T. DeMaria, 2016: Satellite Views of the Tropical Cyclone Lifecycle. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico. (poster)

Knaff, J. A., G. Chirokova, C. R. Sampson, and M. DeMaria, 2016: Development of Global Statistical-Dynamical Tropical Cyclone Wind Radii and MSLP Guidance. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.

Trabing, B. C., J. A. Knaff, 2016: Analysis of Hurricanes Using Long-Range Lightning Detection Networks. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.

Wu, T. - C., M. Zupanski, L. D. Grasso, P. Brown, C. D. Kummerow, and J. A. Knaff, 2016: The GSI Capability to Assimilate TRMM and GPM Hydrometeor Retrievals in HWRF. 32nd AMS Conference on Hurricanes and Tropical Meteorology, 18-20 April 2016, San Juan, Puerto Rico.

Wu, T. - C., M. Zupanski, L. D. Grasso, P. Brown, C. D. Kummerow, and J. A. Knaff, 2016: The GSI capability to assimilate TRMM and GPM hydrometeor retrievals in HWRF. JCSDA 14th Technical Review Meeting and Science Workshop on Satellite Data Assimilation. 31 May-2 June 2016, Moss Landing, CA. Oral presentation given by L. D. Grasso for Ting-Chi

Musgrave, K. D., J. A. Knaff, C. Slocum, L. D. Grasso, and M. DeMaria, 2016: Examination of tropical cyclone structure through synthetic satellite brightness temperatures. 20th Conference on Integrated Observing and Assimilation Systems for the Atmosphere, Oceans, and Land Surface (IOAS-AOLS), AMS Annual Meeting, 10-14 January 2016, New Orleans, LA. (poster presentation)

Camargo, S., J. A. Knaff, D. Chavas, 2015: The relationship of tropical cyclone size with ENSO. 2015 AGU Fall Meeting. 14-18 December 2014, San Francisco, CA.

Chirokova, G., R. T. DeMaria, J. F. Dostalek, K. D. Musgrave, and J. A. Knaff, 2015: Use of JPSS ATMS, CrIS, and VIIRS data to Improve Tropical Cyclone Track and Intensity Forecasting. 2015 AGU Fall Meeting. 14-18 December 2014, San Francisco, CA. Oral presentation

DeMaria, R. T., G. Chirokova, J. A. Knaff, and J. F. Dostalek, 2015: Machine Learning Algorithms for Tropical Cyclone Center Fixing and Eye Detection. 20th Conference on Satellite Meteorology and Oceanography, 4-8 January, Phoenix, AZ. PDF

Tourville, N., J. A. Knaff, 2015: Understanding Tropical Cyclone Cloud-top Microphysical Relationships using CloudSat and A-Train data. 2015 AGU Fall Meeting. 14-18 December 2014, San Francisco, CA. Poster Presentation

Beven, J. L., M. J. Brennan, H. D. Cobb III, M. DeMaria, J. A. Knaff, A.B. Schumacher, C. Velden, S.A. Monette, J.P. Dunion, G.J. Jedlovec, K.K. Fuell, and M.J. Folmer, 2014: The Satellite Proving Ground at the National Hurricane Center. 31st Conference on Hurricanes and Tropical Meteorology. 30-March-4 April, San Diego, CA.

Knaff, J. A., 2014: ATCF: Lessons learned on TC consensus forecasting. International Cooperative for Aerosol Prediction (ICAP) Validation Workshop at NCAR, 21 October, Boulder, CO.

Knaff, J. A., M. Bell, J. C. L. Chan, K. T. F. Chan, H. - C. Kuo, C. - S. Lee, W. - C. Lee, C. M. Rozoff, K.Wood, and C. R. Sampson, 2014: Special Focus Session SF 4a Objective structure analysis, WMO International Workshop on Tropical Cyclones VIII, Jeju Island, Republic of Korea, 2-8 December, 23 pp.

Knaff, J. A., M. DeMaria, S. P. Longmore, R. T. DeMaria, 2014: Improving Tropical Cyclone Guidance Tools by Accounting for Variations in Size. 31st Conference on Hurricanes and Tropical Meteorology. 30 March-4 April, San Diego, CA. PDF

Knaff, J. A., S. P. Longmore, D. A. Molenar, 2014: Improved Estimates of Tropical Cyclone Surface Wind Structure from Routine Satellite reconnaissance. NOAA Satellite Science Week.

Knaff, J. A., S. P. Longmore, R. T. DeMaria, 2014: An Improved Method to Estimate Tropical Cyclone Surface Wind Fields from Routine Satellite Reconnaissance. 31st Conference on Hurricanes and Tropical Meteorology. 30-March-4 April, San Diego, CA.

Longmore, S. P., A. B. Schumacher, J. D. Dostalek, R. T. DeMaria, G. Chirokova, J. A. Knaff, M. DeMaria, D. Powell, A. Sigmund, W. Yu, 2014: Lessons Learned From the Deployment and Integration of a Microwave Sounder Based Tropical Cyclone Intensity and Surface Wind Estimation Algorithm into NOAA/NESDIS Satellite Production Operations. UCAR Software Engineering Assembly, 7-11 April, Boulder, CO.

Sampson, C. R., J. A. Knaff, J. Courtney, B. Strahl, F. Fujita, N. Koide, O. Bousquet, T. Dupont, M. Brennan, V. Tallapragada, T. Marchok, S. G. Gopalakrishnan, B. Chen, M. Mohapatra, S. D. Kotal, U. C. Mohanty, M. Fiorino, J. Doyle, and R. Elsberry, 2014: Topic 2.7 Advances in intensity guidance, MO International Workshop on Tropical Cyclones VIII, Jeju Island, Republic of Korea, 2-8 December, 26 pp.

Schumacher, A. B., M. DeMaria, J. A. Knaff, L. Ma, H. Syed, 2014: Updates to the NESDIS Tropical Cyclone Formation Probability Product. 31st Conference on Hurricanes and Tropical Meteorology. 30-March-4 April, San Diego, CA.

Apodaca, K., M. Zupanski, M. Zhang, M. DeMaria, J. A. Knaff, G. DeMaria, and L. D. Grasso, 2013: Evaluating the potential impact of assimilating satellite lightning data utilizing hybrid variational ensemble methods, Ninth Annual Symposium on Future Operational Environmental Satellite Systems, 6-10 January, Austin, TX.

DeMaria, M., A. B. Schumacher, J. A. Knaff, R. L. Brummer, 2013: Improvements in Statistical Tropical Cyclone Forecast Models: A Year 2 Joint Hurricane Testbed Project Update. 67th Interdepartmental Hurricane Conference, 4-8 March, College Park, MD.

Knaff, J. A., R. L. Brummer, M. DeMaria, C. Landsea, M. Brennan, R. Berg, J. Schauer, 2013: Development of a Real-Time Automated Tropical Cyclone Surface Wind Analysis: A Year 2 Joint Hurricane Testbed Project Update.  67th Interdepartmental Hurricane Conference, 4-8 March, College Park, MD.

Knaff, J. A., M. DeMaria, S. P. Longmore, and C. R. Sampson, 2013: Examination of Global Satellite-Based Tropical Cyclone Size Variations. 20th AMS Conference on Applied Climatology, 6-10 January, Austin TX.

Longmore, S. P., J. A. Knaff, M. DeMaria, 2013:  A Pseudo Object Oriented netCDF Application Interface Layer to “Simplify” Access to Satellite and Future Atmospheric Datasets.  AMS 29th Conference on Environmental Information Processing Technologies. 6-10 January, Austin, TX.

Beven, J., M. Brennan, H. Cobb, M. DeMaria, J. A. Knaff, C. Velden, J. Dunion, and G. Jedlovec, 2012: The 2011 GOES-R Proving Ground at the National Hurricane Center.66th Interdepartmental Hurricane Conference, March 5-8, Charleston, SC.

DeMaria, M., J. A. Knaff, J. L. Beven, M. Brennan, S. D. Miller, A.B. Schumacher, R. T. DeMaria, J. F. Dostalek, D. Welsh, 2012: Applications of Joint Polar Satellite System (JPSS) Imagers and Sounders to Tropical Cyclone Track and Intensity Forecasting, 2012 NOAA Satellite Science Week, 30 April-4 May, Kansas City, MO.

DeMaria, M., A. B, Schumacher, J. A. Knaff, and R. L. Brummer, 2012: Improvements in Statistical Tropical Cyclone Forecast Models: A Year 1 Joint Hurricane Testbed Project Update. 66th Interdepartmental Hurricane Conference, March 5-8, Charleston, SC.

Folmer, M. J., A. L. Molthan, K. K. Fuell, J. A. Knaff, J. M. Sienkiewicz, E. Danaher, J. Kibler, D. R. Novak, B. Reed, J. L. Beven II, M. DeMaria, 2012: The Use of the RGB Airmass Product at the HPC, OPC, NHC, and SAB GOES-R Proving Grounds during the 2011 Atlantic Hurricane Season. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Kaplan, J., C. M. Rozoff, C. R. Sampson, J. P. Kossin, C. S. Velden, M. DeMaria, J. A. Knaff, 2012: Assessing the predictability of tropical cyclone rapid intensification as a function of forecast lead-time using the SHIPS rapid intensification index. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Knaff, J. A., R. L. Brummer, M. DeMaria, C. Landsea, and J. Franklin, 2012: Development of a Real-Time Automated Tropical Cyclone Surface Wind Analysis: A Year 1 Joint Hurricane Testbed Project Update. 66th Interdepartmental Hurricane Conference, March 5-8, Charleston, SC.

Knaff, J. A., M. DeMaria, D. W. Hillger, D. T. Lindsey, D. A. Molenar, J.L. Beven II, M. J. Brennan, H.D. Cobb III, R. L. Brummer, A.B. Schumacher, J. Dunion, K. K. Fuell, A. L. Molthan, C. S. Velden, 2012: Overview of the GOES-R Proving Ground Activities at National Hurricane Center, 30th Conference on Hurricanes and Tropical Meteorology, 16-20 April, Ponte Vedra Beach, FL

Knaff, J. A, M. DeMaria, C. R. Sampson, J. E. Peak, J. Cummings and W. H. Schubert, 2012: The upper ocean’s thermal response to tropical cyclones. 30th Conf. on Hurr. And Trop. Met., April 15-20, Ponte Vedra Beach, FL. (available online at: https://ams.confex.com/ams/30Hurricane/webprogram/Paper204597.html)

Knapp, K. R., J. A. Knaff, C. R. Sampson, 2012: Inter-comparison of climatological TC winds and pressures in the Western North Pacific. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Peak, J. E., C. R. Sampson, J. Cummings, J. A. Knaff, M. DeMaria, W. Schubert, 2012: An Upper Ocean Thermal Field Metrics Dataset. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Sampson, C. R., A. B. Schumacher, J. A. Knaff, M. DeMaria, E. M. Fukada, C. Sisko, D. P. Roberts, K. A. Winters, H. M. Wilson, 2012: An Objective Aid for DoD Base Preparations in Advance of Tropical Cyclones. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Schumacher, A. B., M. DeMaria, K. D. Musgrave and J. A. Knaff, 2012: Development of a Hybrid Statistical-Dynamical Wind Speed Probability Model. 66th Interdepartmental Hurricane Conference, March 5-8, Charleston, SC.

Sitkowski, M., J. P. Kossin, C. M. Rozoff, J. A. Knaff, 2012: Thermodynamic Evolution of the Hurricane Inner-Core during Eyewall Replacement Cycles and Ramifications of the Relict Wind Maximum. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Zhang, F., Y. Weng, X. Ge, J. A. Knaff, 2012: Performance of Cloud-permitting Hurricane Prediction through Assimilating High-resolution Airborne Doppler Radar and Satellite-derived Inner-core Observations. 30th AMS Conference on Hurricanes and Tropical Meteorology, 15-20 April, Ponte Vedra Beach, FL.

Zhang, M., M. Zupanski, M. - J. Kim, and J. A. Knaff, 2012: All-sky radiance assimilation using NOAA operational HWRF and a regional hybrid ensemble-variational data assimilation system. Warn-on-Forecast and High Impact Weather Workshop, 8-9 February 2012, Norman, OK.

Zupanski, M., K. Apodaca, M. Zhang, L. D. Grasso, G. DeMaria, and J. A. Knaff, 2012: Utility of GOES-R Geostationary Lightning Mapper (GLM) using Hybrid Variational-Ensemble Data Assimilation in Regional Applications. NOAA Satellite Science Week Meeting, 30 April – 4 May, Kansas City, MO.

Zupanski M., L. D. Grasso, J. A. Knaff, K. Apodaca, and M. Zhang, 2012: Utility of GOES-R Geostationary Lightning Mapper (GLM) using Hybrid Variational-Ensemble Data Assimilation in Regional Applications. NOAA Satellite Science Week 2012, April 30-May 4, 2012, Kansas City, MS. [Available at
http://www.goes-r.gov/downloads/2012-Science-Week/posters/tues/14_Zupanski.pdf]

Apodaca, K., M. Zupanski, J. A. Knaff, and L. D. Grasso, 2011: Assimilation of MSG-SEVIRI cloudy radiances into MLEF-HWRF as a GOES-R ABI proxy. JCSDA 9th Workshop on Satellite Data Assimilation, 24-25 May, College Park, Maryland.

DeMaria, M., J. A Knaff, M. J. Brennan, J. L. Beven, R. T. DeMaria, A. B. Schumacher, J. Kaplan, and N. W. S. Demetriades, 2011: Tropical cyclone rapid intensity change forecasting using lightning data during the 2010 GOES-R Proving Ground at the National Hurricane Center. AMS Fifth Conference on the Meteorological Applications of Lightning Data, 23-27 January, Seattle, WA.

Hansen, J., C. R. Sampson, P. A. Wittmann, M. DeMaria, and J. A. Knaff, 2011: Covarying TC-forced wind speed/wave height probabilities. AMS Seventh Annual Symposium on Future Operational Environmental Satellite Systems. 23-27 January, Seattle, WA.

Schumacher, A. B., M. DeMaria, J. A. Knaff, L. Zhao, and T. Schott, 2011. NPP Microwave Sounder-Based Tropical Cyclone Products. 65th Interdepartmental Hurricane Conference, 28 Feb – 3 Mar, Miami, FL.

DeMaria, M., and J. A. Knaff, 2011: TC rapid intensity forecasting. GOES-R Risk Reduction Annual Review, September

Knaff, J. A., 2011: New Tropical Cyclone Intensity Forecast Tools for the Western North Pacific. Joint Typhoon Warning Center. September 13.

Knaff, J. A., 2011: Overview of CIRA and NESDIS Global TC Services. WMO Southern Hemisphere TC Workshop, Melbourne, Australia (via remote webinar), 14 September.

Knaff, J. A., 2011: A presentation proposing the promotion of the Multi-platform Tropical Cyclone Surface Wind Analysis (MTCSWA) was presented to the SPSRB.

Knaff, J. A., M. DeMaria, J. Kaplan, C. M. Rozoff, J. Kossin, and C. S. Velden, 2011: Improvements to statistical intensity forecasts.  65th Interdepartmental Hurricane Conference, 28 February-3 March, Miami, FL.

Lindsey, D. T., D. W. Hillger, D. A. Molenar, J. A. Knaff, M. DeMaria, S. D. Miller, R. L. Brummer, L. D. Grasso, S. Q. Kidder, D. E. Bikos, J. Braun, B. H. Connell, E. J. Szoke, H. Gosden, K. Micke, R. T. DeMaria, 2011: GOES-R Proving Ground Product Development at CIRA, 36th NWA Annual Meeting & GOES User Conference, 17-21 October, Birmingham, AL.

Brummer, R. L., C. Combs, B. H. Connell, M. DeMaria, R. T. DeMaria, J. F. Dostalek, L. D. Grasso, D. W. Hillger, J. A. Knaff, D. Zupanski, and D. T. Lindsey, 2010: GOES-R mesoscale product development at CIRA and STAR/RAMMB. 6th Annual Symposium on Future National Operational Environmental Satellite Systems-NPOESS and GOES-R,  16-21 January 2010, Atlanta, GA.

DeMaria, M., J. A., Knaff, R. T. DeMaria, J. Kaplan, and N. Demetriades, 2010: Application of Lightning Measurements to Tropical Cyclone Rapid Intensity Change Forecasting. 17th AMS Conference on Satellite Meteorology and Oceanography, Annapolis MD, September 27-October 1.

Kaplan, J, J. J. Cione, M. DeMaria, J. A. Knaff, J. Dunion, J. F. Dostalek, J. E. Solbrig, J. Hawkins, T. F. Lee, J. Zhang, E. Kalina, and P. Leighton, 2010:  Enhancements to the operational SHIPS rapid intensification index.  29th Conference on Hurricanes and Tropical Meteorology, 8-12 May 2010, Tucson, AZ. 

Knaff J. A., and M. DeMaria, 2010: Rapid Weakening of Non-Landfalling Atlantic Tropical Cyclones. Interdepartmental Hurricane Conference, 1-4 March, Savannah, GA.

Knaff, J. A, M. DeMaria, J. Kaplan, J. Dunion, R. T. DeMaria, 2010:  Assessing the impact of total Precipitable water and lightning on SHIPS forecasts.  29th Conference on Hurricanes and Tropical Meteorology, 8-12 May 2010, Tucson, AZ. 

Knaff, J. A., and B. A. Harper, 2010:  Tropical cyclone surface wind structure and wind-pressure relationships.  Keynote #3, WMO International Workshop on Tropical Cyclones – VII, La Reunion, France, 15-20 November, 35pp.

Miller, S. D., C. Combs, S. Q. Kidder, A. K. Heidinger, M. Sengupta, J. A. Knaff, D. W. Hillger, R. L. Brummer, and I. Laszlo, 2010: GOES-based solar energy prediction products for decision makers, First Conference on Weather, Climate, and the New Energy Economy, and 8th Users Forum on Weather and Climate Impacts, AMS, Atlanta GA.

Schumacher A. B, M. DeMaria, J. A. Knaff, C. R. Sampson, and D. P. Brown, 2010:  Objective tropical cyclone warning guidance using Monte Carlo wind speed probabilities.29th Conference on Hurricanes and Tropical Meteorology, 8-12 May 2010, Tucson, AZ. 

Seybold, M., M. Turk, M. DeMaria, J. A. Knaff, A. B. Schumacher, C. Velden, T. Olander, E. Ebert, S. Q. Kidder, and R. Kuligowski, 2010: Operational Tropical Cyclone Satellite Products Available from NOAA/NESDIS/OSDPD. 17th AMS Conference on Satellite Meteorology and Oceanography, Annapolis MD, September 27-October 1.

Velden C. S., C. Rozoff, A. Wimmers, M. Sitkowski, M. E. Kieper, J. Kossin, J. Hawkins, and J. A. Knaff, 2010:  An objective method to predict near real time rapid intensification of tropical cyclones using satellite passive microwave observations. 29th Conference on Hurricanes and Tropical Meteorology, 8-12 May 2010, Tucson, AZ. 

Brennan, M. J., D. P. Brown, R. D. Knabb, M. DeMaria, A. B. Schumacher, and J. A. Knaff, 2009:  Tropical cyclone wind speed probabilities: Operational results and future applications. AMS 23rd Conference on Weather Analysis and Forecasting/19th Conference on Numerical Weather Prediction. 1-5 June 2009, Omaha, NE.

DeMaria, M., S. Q. Kidder, C. R. Sampson, J. A. Knaff, C. Lauer, and C. Sisko, 2009:  An Improved Wind Probabability Program: A Year 2 Joint Hurricane Testbed Project Update.63rd Interdepartmental Hurricane Conference, 2-5 March, St. Petersburg, FL

DeMaria, M., J. A. Knaff, A. B. Schumacher, J. Kaplan, D. Brown, G. Gallina, J. Kossin, 2009: Improved GOES Utilization for Tropical Cyclone Forecasting. 63rd Interdepartmental Hurricane Conference, 2-5 March, St. Petersburg, FL.

Knaff, J. A., 2009:  Propagating patterns in 6.7 µm imagery in re-intensifying tropical-to-extratropical cyclone transitions.  16th AMS Conference on Satellite Meteorology and Oceanography, 11-15 January, Phoenix, AZ.

Knaff, J. A. 2009: Understanding and (possibly) rectifying historical and regional wind-pressure relationship differences. International Best Track And Climate Stewardship Workshop (IBTrACS) Workshop, 5-7 May, Ashville, NC.

Knaff, J. A., D. Brown, J. Courtney, M. Gallina, 2009: An Evaluation of Biases and Errors Associated with the Subjective Dvorak Technique 1989-2007. International Best Track and Climate Stewardship (IBTrACS) Workshop, 5-7 May, Ashville, NC.

Knaff, J. A., D. W. Hillger, M. DeMaria, J. Gurka, 2009: Developing GOES-R Tropical Cyclone Products vis Proxies. 63rd Interdepartmental Hurricane Conference, 2-5 March, St. Petersburg, FL.

Brummer, R. L., M. DeMaria, J. A. Knaff, B.H. Connell, J.F. Dostalek, D. Zupanski, 2008: GOES-R mesoscale product development. 5th AMS GOES Users’ Conference, 21-25 January, New Orleans, LA.

DeMaria, M., S. Q. Kidder, P. Harr, J. A. Knaff, C. Lauer, 2008: An improved wind probability program: A Joint Testbed Project update. 62nd Interdepartmental Hurricane Conference, 3-7 March, Charleston, SC.

Knaff, J. A., 2008:  Rapid tropical cyclone transitions to major hurricane intensity: Structural evolution of infrared imagery.  28th AMS Conference on Hurricanes and Tropical Meteorology, 28 April-2 May, Orlando, FL.

Knaff, J. A., A. Krautkramer, M. DeMaria, A. B. Schumacher, 2008:  New and updated operational tropical cyclone wind products. 62nd Interdepartmental Hurricane Conference, 3-7 March, Charleston, SC.

Mainelli, M., R. D. Knabb, M. DeMaria, and J. A. Knaff, 2008: Tropical cyclone wind speed probabilities and their relationships with coastal watches and warnings issued by the National Hurricane Center.  28th AMS Conference on Hurricanes and Tropical Meteorology, 28 April-2 May, Orlando, FL.

Majumdar, S., J. J. Cione, E. Uhlhorn, G. Cascella, S. D. Aberson, R. Atlas, J. L. Beven, D. P. Brown, J. P. Dunion, C. Fogarty, R. Hart, D. C. Herndon, J. A. Knaff, C. W. Landsea, F. D. Marks, and C. Velden, 2008: Analysis of the inner-core characteristics of Noel (2007) during its extratropical transition.  28th AMS Conference on Hurricanes and Tropical Meteorology, 28 April-2 May, Orlando, FL.

Schumacher, A. B., M. DeMaria, J. A. Knaff, D. P. Brown, 2008: The NESDIS tropical cyclone formation probability product: An overview of past performance and future plans. 62nd Interdepartmental Hurricane Conference, 3-7 March, Charleston, SC.

DeMaria, M., J. A. Knaff, and J. Kaplan, 2007:  Improved Statistical Intensity Forecast Models: A Joint Hurricane Testbed Project Year 2 Progress Report.  61st Interdepartmental Hurricane Conference, 5-9 March, New Orleans, LA.

Hillger, D. W., T. Schmit, D. T. Lindsey, J. A. Knaff, J. Daniels, 2007:  An overview of GOES-13 science test.  3rd Symposium on Future National Operational Environmental Satellites, 14-18 January 2007, San Antonio, TX.

Knaff, J. A., 2007:   Introducing the CIRA/NESDIS – Regional and Mesoscale Meteorology Branch Tropical Cyclone Web Page. 61st Interdepartmental Hurricane Conference, 5-9 March, New Orleans, LA.

Knaff, J. A., M. DeMaria, A. Krautkramer, B. Sampson, and G. Goni, 2007:  Introducing the CIRA/NESDIS – Regional and Mesoscale Meteorology Branch Tropical Cyclone Web Page.  61st Interdepartmental Hurricane Conference, 5-9 March, New Orleans, LA.  

Knaff, J. A., M. DeMaria, and C. Lauer, 2007:  Verification of the Monte Carlo Tropical Cyclone Wind Speed Probabilities:  A Joint Hurricane Testbed Project Update. 61st Interdepartmental Hurricane Conference, 5-9 March 2007, New Orleans, LA.

Knaff, J. A., C. Guard, J. Kossin, T. Marchok, B. Sampson, T. Smith, and N. Surgi, 2007: Operational guidance and skill in forecasting structure change. Proc. Sixth Int. Workshop on Tropical Cyclones, San José, Costa Rica, WMO Tech. Doc. 1383. [Available online at http://severe.worldweather.org/iwtc/.]

Landsea C. W., B. A. Harper, K. Hoarau, and J. A. Knaff, 2007: Can we detect climate trends in extreme tropical cyclones?, AMS Forum: Climate Change Manifested by Changes in Weather, 14-18 January, San Antonio, TX.

Schumacher, A. B., M. DeMaria, J. A. Knaff, A. Irving, N. Merckle, 2007:  A New Tropical Cyclone Formation Product: Operational Implementation for the Atlantic and Eastern Pacific in 2006 and Extension to the Western N. Pacific in 2007.  61st Interdepartmental Hurricane Conference, 5-9 March, New Orleans, LA. .

Schumacher, A. B., J. A. Knaff, T. Cram, M. DeMaria, J. Kossin, 2007: Operational implementation of an objective annual hurricane index.  61st Interdepartmental Hurricane Conference, 5-9 March 2007, New Orleans, LA.

Cram, T., J. A. Knaff, and M. DeMaria, 2006:  Objective Identification of Annular Hurricanes Using GOES and Reanalysis Data. AMS 27th Conference on Hurricanes and Tropical Meteorology.  24-28 April, Monterey, CA.

DeMaria, M., K. S. Maclay, and J. A. Knaff, 2006:  Tropical cyclone structure analysis: a multi-sensor approach.  AGU Fall Meeting, 11–15 December 2006, San Francisco, CA.

Hillger, D. W., T. Schmit, D. T. Lindsey, J. A. Knaff, and J. Daniels, 2006: An Overview of GOES-N Science Test. AMS 14th Conference on Satellite Meteorology and Oceanography. 29 January-3 February, Atlanta, GA.

Knaff, J. A., 2006:  Diagnosing tropical cyclone structure from satellite-based methods.  Risk Prediction Prediction Initiative Research Workshop, Hamilton, Bermuda.

Knaff, J. A., 2006: Real-time forecasting of the wind structure: Current capabilities and challenges.  Risk management solutions.  Eyewall Symposium, 12 October 2006, New York, NY.

Knaff, J. A., and M. DeMaria, 2006:  Continued development of tropical cyclone wind probability products, 60th Interdepartmental Hurricane Conference, 20-24 March 2006, Mobile, AL.

Knaff, J. A., and M. DeMaria, 2006: A Multi-platform Satellite Tropical Cyclone Wind Analysis System. AMS 14th Conference on Satellite Meteorology and Oceanography. 29 January-3 February, Atlanta, GA.

Knaff, J. A., C. Guard, J. Kossin, T. Marchok, B. Sampson, T. Smith, N. Surgi, 2006:  Topic 1.5:  Operational guicance and skill in forecasting structure change.  WMO International Workshop on Tropical Cyclones, 20-30 November 2006, San Jose, Costa Rica.

Knaff, J. A., and C. R. Sampson, 2006:  Reanalysis of West Pacific tropical cyclone intensity 1966-1987. AMS 27th Conference on Hurricanes and Tropical Meteorology.  24-28 April, Monterey, CA.

Sampson, C. R., J. A. Knaff, and M. DeMaria , 2006: A statistical intensity model consensus for the Joint Typhoon Warning Center. AMS 27th Conference on Hurricanes and Tropical Meteorology.  24-28 April, Monterey, CA.

DeMaria, M., J. A. Knaff, J. Demuth, R. M. Zehr, and J. F. Dostalek, 2005:  CIRA contributions to the Joint Hurricane Testbed. CIRA Magazine, Spring, 5-7.

DeMaria, M., J. A. Knaff, K. J. Mueller, and R. M. Zehr, 2005:  Improvements in Deterministic and Probabilistic Tropical Cyclone Wind Predictions: A Joint Hurricane Testbed Project Update.  59th Interdepartmental Hurricane Conference, 7-11 March, Jacksonville, FL.

Knaff, J. A., 2005:  Joint Hurricane Testbed, CIRA Magazine,  24, Fall, 16.

Knaff, J. A., M. DeMaria R. M. Zehr, and K. J. Mueller, 2005:  Development of a Multi-platform Satellite Tropical Cyclone Wind Analysis System. 59th Interdepartmental Hurricane Conference, 7-11 March, Jacksonville, FL.

Knaff, J. A., and C. R. Sampson, 2005:  Development of STIPS for the Southern Hemisphere and Indian Ocean. 59th Interdepartmental Hurricane Conference, 7-11 March, Jacksonville, FL.

Mueller, K. J., R. M. Zehr, M. DeMaria, and J. A. Knaff, 2005:  Objective Estimation of Tropical Cyclone Wind Structure From Infrared Satellite Data. 59th Interdepartmental Hurricane Conference, 7-11 March, Jacksonville, FL.

Zehr, R. M., M. DeMaria, J. A. Knaff, and K. J. Mueller, 2005: NOAA’s Next-Generation Polar and Geostationary Satellites – Hurricane Applications. 59th Interdepartmental Hurricane Conference, 7-11 March, Jacksonville, FL.

Bessho, K. M. DeMaria, J. A. Knaff, and J. L. Demuth, 2004:  Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit (AMSU): Application to Surface Wind Analysis. AMS 26th Conference on Hurricanes and Tropical Meteorology.   3-7 May, Miami, FL.

Cecil, D., T. A. Jones, J. A. Knaff, and M. DeMaria, 2004:  Statistical forecasting of Pacific and Indian Ocean tropical cyclone intensity using 19-, 37-, and 85- GHz brightness temperatures. AMS 26th Conference on Hurricanes and Tropical Meteorology.   3-7 May, Miami, FL.

DeMaria, M., C. W. Anderson, J. A. Knaff, and B. H. Connell, 2004:  A New Product for Estimating the Probability of Tropical Cyclone Formation. AMS 26th Conference on Hurricanes and Tropical Meteorology.   3-7 May, Miami, FL.

DeMaria, M., D. W. Hillger, J. F. W. Purdom, R. M. Zehr, H. Gosden, D. L. Watson, J. A. Knaff, D. T. Lindsey, D. E. Bikos, 2004:  Advance Mesoscale Product Development for GOES-R Using  Operational and Experimental Satellite Observations.  3rd GOES Users Conference. 10-13 May, Broomfield, CO.

DeMaria, M., J. A. Knaff, J. F. Dostalek, K. Mueller, 2004: Improvements in Deterministic and Probablistic Tropical Cyclone Surface Wind Predictions. 58th Interdepartmental Hurricane Conference, 1-4 March, Charleston, SC.

Gross, J. M., M. DeMaria, J. A. Knaff, and C. R. Sampson, 2004:  A New Method for Determining Tropical Cyclone Wind Forecast Probabilities. AMS 26th Conference on Hurricanes and Tropical Meteorology.   3-7 May, Miami, FL.

Knaff, J. A., 2004: Overview of recent operational tropical cyclone forecasting tools developed at CIRA.  Joint Typhoon Warning Center, 16 August, Honolulu, HI.

Knaff, J. A., and M. DeMaria, 2004: Development of a Rapid Intensification Index for the Eastern Pacific Basin. 58th Interdepartmental Hurricane Conference, 1-5 March, Charleston, SC.

Knaff, J. A., M. DeMaria, K. Mueller, 2004: Methods to Estimate and Predict Tropical Cyclone Wind Structure: Recent Developments and Future Goals, 58th Interdepartmental Hurricane Conference, 1-4 March, Charleston, SC.

Knaff, J. A., C. R. Sampson, and M. DeMaria, 2004:  An introduction to the statistical typhoon intensity prediction scheme (STIPS).  AMS 26th Conference on Hurricanes and Tropical Meteorology.   3-7 May, Miami, FL.

DeMaria, M., M. Mainelli, L. K. Shay, J. A. Knaff, and J. P. Kossin, 2003:  Improvements in Real-Time Statistical Tropical Cyclone Intensity Forecasts Using Satellite Data.  12th Conference on Satellite Meteorology and Oceanography, 10-14 February, Long Beach, CA, Amer. Meteor. Soc., CD-ROM, JP1.4.

Herndon, D., C. Velden, J. A. Knaff, K. Brueske, M. DeMaria, 2003:  Evaluation of real-time tropical cyclone intensity estimates from AMSU observations.  57th Interdepartmental Hurricane Conference, 10-15 March, Miami, FL

Knaff, J. A., 2003: Description of the statistical typhoon intensity prediction scheme, Naval Postgraduate School, 11 August, Monterey, CA.

Knaff, J. A., 2003:  Research to better diagnos and predict tropical cyclone structure and intensity change, Naval Postgraduate School, 11 August, Monterey, CA

Knaff, J. A., M. DeMaria, C. R. Sampson, J. L. Demuth, 2003:  Recently developed operational and experimental tropical cyclone intensity and structure guidance for the Western North Pacific.  57th Interdepartmental Hurricane Conference,  10-15 March, Miami, FL

Knaff, J. A., N. Wang, M. DeMaria, R. M. Zehr, 2003: Transmission of current GOES imagery aboard the NOAA WP-3 aircraft using wavelet compression techniques. CIRA Magazine, 15-17.

Knaff, J. A., N. Wang, R. M. Zehr, M. DeMaria, J. S. Griffin, and F. D. Marks, 2003:  A demonstration of real-time transmission and display of GOES imagery aboard the NOAA P-3 aircraft during the 2002 hurricane season.  12th Conference on Satellite Meteorology and Oceanography, 10-14 February, Long Beach, CA, Amer. Meteor. Soc., CD-ROM, JP1.5.

Reasor, P. D., M. T. Montgomery, F. D. Marks, L. F. Bosart, J. F. Gamache, and J. A. Knaff, 2003:  Diagnosing the Role of Convective Hot Towers in Tropical Cyclogenesis Using Airborne Doppler-derived Winds. Simpson Symposium, 10-14 February, Long Beach, CA, Amer. Meteor. Soc.

Zehr, R. M., M. DeMaria, J. A. Knaff, K. Mueller, K. Bessho,  2003: Tropical cyclone surface wind analysis using satellite data: Dvorak, microwave, scatterometer, and cloud motion winds.  57th Interdepartmental Hurricane Conference, 10-15 March, Miami, FL

DeMaria, M., R. M. Zehr, J. P. Kossin, and J. A. Knaff, 2002:  The Use of GOES Imagery in Statistical Hurricane Intensity Prediction, 25th Conf. on Hurricanes and Tropical Meteorology, 29 April-3 May, San Diego, CA, Amer. Meteor. Soc., 120-121.

DeMaria, M., R. M. Zehr, C. S. Velden, J. A. Knaff, J.L. Demuth, and K.F. Brueske, 2002:  An Update on Joint Hurricane Testbed (JHT) Projects at CIRA and CIMSS, 56th Interdepartmental Hurricane Conf., 11-15 March, New Orleans, LA.

Demuth, J. L., M. DeMaria, J. A. Knaff, C. S. Velden, and K. Brueske, 2002:  An Evaluation of CIMSS and CIRA AMSU Tropical Cyclone Intensity Estimation Algorithms.  25th Conf. on Hurricanes and Tropical Meteorology, 29 April-3 May, San Diego, CA, Amer. Meteor. Soc., 27-28.

Knaff, J. A., 2002: AMSU-based tropical cyclone intensity and structure estimates from CIRA/NESDIS.  Presentation during the AMSU Workshop at the WMO International Workshop on Tropical Cyclones. 5 December, Cairns, Australia.

Knaff, J. A., and M. DeMaria, 2002: Current and future tropical cyclone projects at CIRA/NESDIS: An update and outlook.  Presented at the National Hurricane Center, 17 October, Miami, FL

Knaff, J. A., and M. DeMaria, 2002:  Statistical Typhoon Intensity Prediction Scheme.  Training presentation give at the Joint Typhoon Warning Center, 24 May, Honolulu, HI.

Knaff, J. A., M. DeMaria, and J. L. Demuth, 2002: Tropical cyclone forecast products derived from the Advanced microwave sounding unit.  Training presentation give at the Joint Typhoon Warning Center, 24 May, Honolulu, HI.

Knaff, J. A., M. DeMaria, C. R. Sampson, and J. M. Gross, 2002:  New Operational Tools to Produce Five-day Tropical Cyclone Intensity Forecasts. 56th Interdepartmental Hurricane Conf., 11-15 March, New Orleans, LA.

Knaff, J. A., J. P. Kossin, and M. DeMaria, 2002:  What are Annular Hurricanes? 25th Conf. on Hurricanes and Tropical Meteorology, 29 April-3 May, San Diego, CA, Amer. Meteor. Soc., 609-610.

Knaff, J. A., and C. S. Velden, 2002:  Examining the Eight-Day Evolution of Upper Level Winds in Hurricane Floyd. 25th Conf. on Hurricanes and Tropical Meteorology, 29 April-3 May, San Diego, CA, Amer. Meteor. Soc., 37-38.

Landsea, C. W., and J. A. Knaff, 2002:  How much "skill" was there in forecasting the strong 1997-98 El Nino and 1998-2001 La Nina events? 25th Conf. on Hurricanes and Tropical Meteorology, 29 April-3 May, San Diego, CA, Amer. Meteor. Soc.

Chase, T. N., J. A. Knaff, and R. A. Pielke, 2001: Trends in global monsoon circulations: Evidence for a diminished hydrological cycle? 12th Symposium on Global Change Studies and Climate Variations - 81st Annual AMS Meeting, 14-19 January, Albuquerque, NM, Amer. Meteor. Soc.

DeMaria, M., J. L. Demuth, and J. A. Knaff, 2001: Validation of an Advanced Microwave Sounder Unit (AMSU) tropical cyclone intensity and size estimation algorithm.  11th Conf. on Satellite Meteorology and Oceanography, 15-18 October, Madison, WI, Amer. Meteor. Soc., 300-303.

DeMaria, M., C. S. Velden, J. L. Demuth, J. A. Knaff, S. Q. Kidder, and K. Brueske, 2001: An overview of tropical cyclone applications of advanced microwave sounder unit (AMSU) data. 55th Interdepartmental Hurricane Conf., 5-9 March, Orlando, FL, b-119 - b-123.

Kidder, S. Q., J. A. Knaff, and S. J. Kusselson, 2001:  Using AMSU data to forecast precipitation from landfalling hurricanes. Symposium on Precipitation of Extremes: Prediction, Impacts, and Responses,14-19 January, Albuquerque, NM, Amer. Meteor. Soc., 344-346.

Kidder, S. Q., S. J. Kusselson, J. A. Knaff, and R. J. Kuligowski, 2001:  Improvements to the experimental tropical rainfall potential (TraP) technique.  11th Conf. on Satellite Meteorology and Oceanography, 15-18 October, Madison, WI, Amer. Meteor. Soc., 375-378.

Knaff, J. A., and C. W. Landsea, 2001:  Application of the El Nino--southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin, 10:2, 31-34.

Knaff, J. A., and C. W. Landsea, 2001: Application of the El Ni?o--Southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin10:3, 40-42.

Knaff J. A., J. P. Kossin, M. DeMaria, and V. E. Larson, 2001, A discussion of intensities associated with doughnut hurricanes, 55th Interdepartmental Hurricane Conf., 5-9 March, Orlando, FL.

Knaff, J. A., and C. S. Velden, 2001: The evolution of upper level winds in Hurricane Floyd. 55th Interdepartmental Hurricane Conf., 5-9 March, Orlando, FL.

Landsea, C. W., and J. A. Knaff, 2001:  Application of the El Nino--southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme.  Experimental Long--Lead Forecast Bulletin, 10:1, 31-33.

Landsea, C. W., and  J. A. Knaff, 2001: Application of the El Ni?o--Southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin, 10:4, 41-43.

Landsea, C. W., and J. A. Knaff, 2001:  How much "skill" was there in forecasting the strong 1997-98 El Nino and 1998-2000 La Nina events? Climate Variability, the Ocean, and Societal Impacts - 81st Annual AMS Meeting, 14-19 January, Albuquerque, NM, Amer. Meteor. Soc.

Weaver, J. F., J. A. Knaff, J. M. Daniels, and G. S. Wade, 2001:  Observations of a severe supercell thunderstorm on 24 July using GOES-11 sounder and imagery.  11th Conf. on Satellite Meteorology and Oceanography, 15-18 October, Madison, WI, Amer. Meteor. Soc., 397-401.

DeMaria, M., B. H. Connell, J. A. Knaff, and R. M. Zehr, 2000: Improvements in tropical cyclone genesis and intensity forecasts using GOES imager and sounder data.  54th Interdepartmental Hurricane Conf., 14-17 February, Houston, TX, NOAA/OFCM, A98-A103.

DeMaria, M., J. A. Knaff, S. Q. Kidder, and M. D. Goldberg, 2000: Tropical cyclone wind retrievals using AMSU-A data from NOAA-15. 10th Conf. on Satellite Meteorology and Oceanography.  14-18 January, Long Beach, CA, Amer. Meteor. Soc., 149-152.

Demuth, J. L., M. DeMaria, J. A. Knaff, and T.H. Vonder Haar, 2000:  An objective method for estimating tropical cyclone intensity and structure from NOAA-15 Advanced Microwave Sounding Unit (AMSU) data. 24th Conf. on Hurricanes and Tropical Meteorology.  29 May - 2 June, Fort Lauderdale, FL, Amer. Meteor. Soc., 484-485.

Dostalek, J. F., M. DeMaria, and J. A. Knaff, 2000:  Advanced Microwave Sounding Unit (AMSU) analyses of marine extratropical cyclones. Northwest Weather Workgroup, 3-6 February, Seattle, WA.

Knaff, J. A. M. DeMaria, and J. L. Demuth, 2000: Tropical cyclone forecast products derived from the Advanced Microwave Sounding Unit. 54th Interdepartmental Hurricane Conf., 14-17 February, Houston, TX, NOAA/OFCM, A104-A109.

Knaff, J. A., and C. W. Landsea, 2000:  Application of the El Nino--southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme.  Experimental Long--Lead Forecast Bulletin, 9:4, 48-50.

Knaff, J. A., and C. W. Landsea, 2000:  Application of the El Nino--southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme.  Experimental Long--Lead Forecast Bulletin, 9, 3, 37-39.

Knaff, J. A., and C. S. Velden, 2000: Relationships between the multi-layered wind field and the intensity of Hurricane Floyd.  24th Conf. on Hurricanes and Tropical Meteorology.  29 May - 2 June, Fort Lauderdale, FL, Amer. Meteor. Soc.,  492-493.

Landsea, C. W., and Knaff, J. A., 2000:  Application of the El Nino--southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme.  Experimental Long--Lead Forecast Bulletin, 9:2, 31-33.

Landsea, C. W., and Knaff, J. A., 2000:  Application of the El Nino--southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme.  Experimental Long--Lead Forecast Bulletin, 9:1, 32-34.

Landsea C. W., and J. A. Knaff, 2000:  How much "skill" is there in forecasting El Nino?, WeatherZine, 23, 2-4.

Landsea, C. W., and J. A. Knaff, 2000:  How much "skill" was there in forecasting the strong 1997-98 El Nino and 1998-2000 La Nina events? 24th Conf. on Hurricanes and Tropical Meteorology.  29 May - 2 June, Fort Lauderdale, FL, Amer. Meteor. Soc., J46.

Knaff, J. A., 1999: How much "skill" did the various forecasting methods available have for the 1997 - 98 El Nino event? 23rd Conf. on Hurricanes and Tropical Meteorology. January 12, Dallas, TX.

Knaff, J. A., 1999: Convective asymmetries in mature tropical cyclones associated with motion and vertical wind shear. Poster session: 23rd Conf. on Hurricanes and Tropical Meteorology. January 12, Dallas, TX.

Knaff, J. A., 1999: Convective asymmetries in mature tropical cyclones associated with motion and vertical wind shear.   23rd Conf. on Hurricanes and Tropical Meteorology, Dallas, TX, 10-15 January 1999, 464-467.

Knaff, J. A., 1999: Tropical cyclone structure as revealed by one-minute satellite imagery. 23rd Conf. on Hurricanes and Tropical Meteorology. 10-15 January, Dallas, TX, Amer. Meteor. Soc., 186-189.

Knaff, J. A., C. W. Landsea, 1999: Application of the El Nino--Southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin8:1, 29-31.

Knaff, J. A., C. W. Landsea, 1999: Application of the El Ni?o--Southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin8:3, 36-38.

Knaff, J. A., and R. M. Zehr, 1999: Convective asymmetries in mature tropical cyclones associated with motion and vertical wind shear. 23rd AMS Conf. on Hurricanes and Tropical Meteorology. 10-15 January, Amer. Meteor. Soc., 464-467.

Landsea, C. W., and J. A. Knaff, 1999: Application of the El Ni?o--Southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin8:2, 39-40.

Landsea, C. W., and J. A. Knaff, 1999: Application of the El Ni?o--Southern Oscillation CLImatology and PERsistence (CLIPER) Forecasting Scheme. Experimental Long--Lead Forecast Bulletin8:4, 34-36.

Landsea, C. W. and J. A. Knaff, 1999: How much "skill" did the various forecasting methods available have for the 1997 - 98 El Nino event? 2nd Hayes Symposium on Seasonal and Interannual Climate Change, January 10-5, Dallas, TX.

Zehr, R. M., M. DeMaria, F. Horsfall and J. A. Knaff, 1999: Observational tropical cyclone data archive and research. 53rd Interdepartmental Hurricane Conference, February 8-12, Biloxi, MS.

Knaff, J. A., 1997: Atlantic summertime sea level pressure anomalies and their relationship to seasonal hurricane activity.  22th Conference on Hurricanes and Tropical Meteorology.  19-23 May, Ft. Collins, CO, Amer. Meteor. Soc., 276-277.

Technical Reports

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Knaff, J. A., M. Bell, J. C. L. Chan, K. T. F. Chan, H.-C. Kuo, C.-S. Lee, W-C Lee, C. M. Rozoff, K.Wood, and C. R. Sampson, 2014: Special Focus Session SF 4a Objective structure analysis, WMO International Workshop on Tropical Cyclones-VIII, Jeju Island, Republic of Korea, 2-8 December, 23 pp. PDF

Sampson, C. R., J. A. Knaff, J. Courtney, B. Strahl, F. Fujita, N. Koide, O. Bousquet, T. Dupont, M. Brennan, V. Tallapragada, T. Marchok, S. G. Gopalakrishnan, B. Chen, M. Mohapatra, S. D. Kotal, U. C. Mohanty, M. Fiorino, J. Doyle, and R. Elsberry, 2014: Topic 2.7 Advances in intensity guidance, WMO International Workshop on Tropical Cyclones-VIII, Jeju Island, Republic of Korea, 2-8 December, 26 pp. PDF

E-mail: John.Knaff@noaa.gov

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