Category Archives: Tropical Cyclones

Extra-tropical transition of Tropical Cyclone Fiona

By Dan Bikos and Sheldon Kusselson Hurricane Fiona underwent a transition from a tropical cyclone to an extra-tropical cyclone on 23-24 September 2022.¬† The resulting extra-tropical cyclone was very intense and led to significant storm surge, wind damage and heavy … Continue reading

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ALPW depiction of many tropical cyclones & disturbances – September 14, 2020

By Sheldon Kusselson

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ALPW depiction of mid-level dry air associated with Tropical Storm Isaias

By Sheldon Kusselson Loop of ALPW 700-500 mb layer over a long time period

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Subtropical storm Melissa

By Sheldon Kusselson and Dan Bikos Subtropical storm Melissa exists off the Eastern coastline of the U.S. on 10-11 October 2019, as GOES-16 visible imagery on 11 October shows: http://rammb.cira.colostate.edu/templates/loop_directory.asp?data_folder=training/visit/loops/11Oct19/vis&loop_speed_ms=60 note the lack of deep convection over the center of … Continue reading

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Hurricane Willa

Hurricane Willa is forecasted to make landfall, along the coast of Mexico, within the next few hours. Willa, once deemed a Category 5 hurricane, has been downgraded to a Category 3 hurricane¬†within the last 24 hours, with max sustained winds … Continue reading

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