* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP922020 08/12/20 18 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 35% 35% LAT (deg N) 13.6 14.0 14.4 14.9 15.2 15.7 15.6 15.3 15.0 14.8 14.8 15.0 15.4 LON (deg W) 126.2 126.1 126.4 126.6 127.1 128.0 128.9 129.8 130.6 131.3 131.8 132.7 134.4 DTL (km) 1917 1879 1874 1855 1877 1899 1974 2066 2151 2221 2260 2318 2209 TRACK SOURCE AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI TCGI 0-48h Genesis Forecast: 35% is 0.8 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 35% is 0.6 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 -1.2 3.1% -2.0 0.0 3.2% VORTICITY 1.6 1.6 10.1% 1.5 1.0 7.2% VERTICAL SHEAR 12.9 12.1 9.6% 14.9 13.2 16.5% RH 79.1 70.9 4.1% 74.8 64.4 2.6% GOES 42.9 25.2 3.2% 42.8 25.2 2.4% DVORAK 0.9 1.0 4.7% 0.9 1.0 3.0% --------------------------------------------------------------------------------------------- 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 3.0, July 2018