* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP952019 08/20/19 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 62% 90% LAT (deg N) 14.2 14.4 14.7 15.0 15.4 16.2 17.2 18.3 19.5 20.8 22.0 23.3 24.8 LON (deg W) 98.0 98.9 100.0 101.0 102.3 104.8 106.9 108.6 109.8 110.3 110.5 110.7 110.9 DTL (km) 197 201 219 232 252 280 314 382 378 235 112 37 -9 TRACK SOURCE AVNI AVNI AVNI AVNI AVNI AVNI AVNI AVNI AVNI AVNI AVNI AVNI AVNI TCGI 0-48h Genesis Forecast: 62% is 1.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 90% is 1.6 times the sample mean ( 56%) --------------------------------------------------------------------------------------------- INDIVIDUAL PREDICTOR CONTRIBUTIONS TO PROBABILITY OF GENESIS ******* 48-HR ****** ******* 120-HR ****** AVG TCGI CONT AVG TCGI CONT DIVERGENCE -2.0 -3.3 7.4% -2.0 -3.1 14.5% VORTICITY 1.6 0.8 9.1% 1.5 1.2 15.1% VERTICAL SHEAR 12.9 16.1 11.1% 14.9 12.6 30.7% RH 79.1 85.2 8.5% 74.8 83.3 6.4% GOES 42.9 75.6 14.6% 42.8 75.6 13.5% DVORAK 0.9 1.5 11.5% 0.9 1.5 9.4% --------------------------------------------------------------------------------------------- PREDICTOR DEFINITIONS (Averaged Over 500 km Radius) GENESIS CLIM = Climatological Prob (%) of Genesis (Source: NHC-TAFB Invest Database) DIVERGENCE = GFS 850 hPa Horizontal Divergence (x10-7 s-1) VORTICITY = GFS 850 hPa Vorticity (x10-6 s-1) VERTICAL SHEAR = GFS 200-850 hPa Vertical Shear (kt) RH = GFS 600-850 hPa Relative Humidity (%) GOES = GOES Water Vapor Pixels Colder than -40C (%) DVORAK = Dvorak T-number, source: TAFB Version 2.1, February 2018