* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP092021 08/03/21 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 64% 76% LAT (deg N) 13.6 14.0 14.3 14.6 14.9 15.7 16.2 16.3 16.1 16.3 16.4 16.1 15.6 LON (deg W) 133.6 134.2 134.6 135.0 135.3 136.5 137.6 139.2 140.8 141.8 142.9 144.2 145.8 DTL (km) 2351 2275 2224 2172 2132 1983 1855 1687 1528 1419 1304 1183 1047 TRACK SOURCE AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 TCGI 0-48h Genesis Forecast: 64% is 1.5 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 76% is 1.3 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 0.9 1.6% -2.0 0.6 3.7% VORTICITY 1.6 2.1 17.6% 1.5 1.9 19.6% VERTICAL SHEAR 12.9 6.6 17.8% 14.9 8.0 31.5% RH 79.1 76.8 8.1% 74.8 74.8 6.5% GOES 42.9 13.5 2.4% 42.8 13.5 2.1% DVORAK 0.9 2.0 16.5% 0.9 2.0 12.4% --------------------------------------------------------------------------------------------- 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 3.0, July 2018