* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP902020 07/20/20 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 23% 49% LAT (deg N) 16.6 16.4 16.1 15.7 15.2 14.0 12.9 11.9 11.6 11.7 12.4 13.5 14.7 LON (deg W) 118.0 119.2 120.4 121.7 123.1 125.9 129.0 131.8 134.4 136.8 139.2 141.5 144.0 DTL (km) 1089 1180 1281 1405 1549 1866 2196 2486 2359 2115 1846 1562 1263 TRACK SOURCE TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 23% is 0.5 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 -0.1 1.5% -2.0 0.6 2.7% VORTICITY 1.6 0.7 4.5% 1.5 1.1 9.6% VERTICAL SHEAR 12.9 6.8 9.1% 14.9 4.1 25.2% RH 79.1 66.1 2.2% 74.8 68.4 3.9% GOES 42.9 26.7 2.6% 42.8 26.7 3.2% DVORAK 0.9 1.0 3.5% 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