* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP922020 08/12/20 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 48% 48% LAT (deg N) 12.7 12.6 12.6 13.2 14.0 15.3 15.8 15.6 14.9 14.3 14.4 14.1 14.2 LON (deg W) 128.2 129.0 129.7 130.1 130.2 130.4 131.5 132.8 133.6 134.3 134.3 135.2 135.0 DTL (km) 2146 2219 2278 2258 2200 2112 2162 2283 2307 2254 2251 2169 2186 TRACK SOURCE AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 AP11 TCGI 0-48h Genesis Forecast: 48% is 1.1 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 48% is 0.8 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 -0.7 3.2% -2.0 1.2 1.6% VORTICITY 1.6 2.2 15.6% 1.5 1.8 14.0% VERTICAL SHEAR 12.9 13.4 11.1% 14.9 16.7 19.4% RH 79.1 74.5 6.1% 74.8 71.6 4.4% GOES 42.9 36.6 5.9% 42.8 36.6 4.4% DVORAK 0.9 1.0 5.7% 0.9 1.0 3.8% --------------------------------------------------------------------------------------------- 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