* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP092021 08/02/21 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 17% 49% LAT (deg N) 11.6 12.5 13.4 13.6 13.7 14.6 15.9 18.3 20.4 20.1 19.4 19.4 18.8 LON (deg W) 129.6 129.2 129.4 129.8 130.1 129.2 127.8 127.1 131.3 134.5 136.9 139.5 142.4 DTL (km) 2342 2243 2191 2203 2217 2077 1868 1626 1846 2123 1875 1603 1303 TRACK SOURCE AP26 AP26 AP26 AP26 AP26 AP26 AP26 AP26 AP26 AP26 AP26 AP26 AP26 TCGI 0-48h Genesis Forecast: 17% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 49% is 0.9 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 0.3 0.9% -2.0 1.0 1.9% VORTICITY 1.6 1.3 5.0% 1.5 2.2 16.6% VERTICAL SHEAR 12.9 19.2 3.6% 14.9 15.3 20.4% RH 79.1 76.7 3.2% 74.8 72.2 4.6% GOES 42.9 18.4 1.3% 42.8 18.4 2.2% DVORAK 0.9 1.0 2.7% 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