* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP102020 08/17/20 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 14% 25% LAT (deg N) 14.2 14.4 14.5 14.6 14.6 14.5 14.1 13.4 12.6 11.9 11.4 11.0 10.9 LON (deg W) 134.4 134.7 135.2 135.8 136.3 137.2 138.1 138.9 139.5 140.2 140.6 140.6 140.4 DTL (km) 2248 2210 2155 2090 2039 1951 1875 1825 1804 1775 1767 1791 1815 TRACK SOURCE AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI AEMI TCGI 0-48h Genesis Forecast: 14% is 0.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 25% is 0.4 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 1.2% -2.0 -0.1 2.5% VORTICITY 1.6 0.2 2.2% 1.5 0.4 3.3% VERTICAL SHEAR 12.9 16.8 4.3% 14.9 11.4 12.9% RH 79.1 65.9 1.7% 74.8 64.3 2.0% GOES 42.9 0.0 0.0% 42.8 0.0 0.0% DVORAK 0.9 1.5 4.6% 0.9 1.5 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