* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP942020 08/15/20 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 74% 87% LAT (deg N) 16.1 16.5 17.4 18.7 19.6 21.4 22.5 23.0 23.0 22.6 21.6 20.5 19.3 LON (deg W) 118.3 118.5 118.5 118.7 119.4 121.5 124.0 126.5 128.6 130.9 133.2 134.9 136.4 DTL (km) 1151 1125 1043 946 931 968 1079 1271 1465 1687 1919 2080 1928 TRACK SOURCE AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 TCGI 0-48h Genesis Forecast: 74% is 1.7 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 87% 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 -0.2 3.3% -2.0 0.9 3.3% VORTICITY 1.6 3.4 27.7% 1.5 3.0 30.9% VERTICAL SHEAR 12.9 5.1 19.9% 14.9 5.4 35.7% RH 79.1 79.0 9.3% 74.8 69.3 5.9% GOES 42.9 34.6 7.0% 42.8 34.6 6.1% DVORAK 0.9 1.0 7.2% 0.9 1.0 5.5% --------------------------------------------------------------------------------------------- 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