* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP102020 08/13/20 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 37% 37% LAT (deg N) 15.1 15.1 15.1 14.8 14.3 13.3 12.4 12.0 11.8 11.9 11.9 12.2 12.5 LON (deg W) 128.1 129.3 130.4 131.6 132.9 135.3 137.3 139.0 140.5 141.8 143.0 144.6 146.1 DTL (km) 1961 2043 2132 2248 2382 2188 2026 1882 1755 1623 1513 1359 1212 TRACK SOURCE TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 37% is 0.8 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 37% is 0.7 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 2.1% -2.0 0.5 2.5% VORTICITY 1.6 1.4 9.6% 1.5 0.7 6.0% VERTICAL SHEAR 12.9 9.8 11.1% 14.9 13.3 17.8% RH 79.1 58.0 1.1% 74.8 56.1 1.8% GOES 42.9 10.2 1.2% 42.8 10.2 1.0% DVORAK 0.9 2.0 11.8% 0.9 2.0 7.8% --------------------------------------------------------------------------------------------- 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