* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP942019 08/15/19 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 19% 23% LAT (deg N) 15.6 16.0 16.4 16.6 16.1 16.5 16.5 17.9 18.7 19.1 19.9 20.2 20.8 LON (deg W) 130.4 131.3 132.4 133.6 135.1 138.0 140.1 142.2 143.8 145.5 146.7 148.1 149.7 DTL (km) 2089 2131 2194 2262 2118 1806 1588 1338 1158 976 848 704 551 TRACK SOURCE AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 TCGI 0-48h Genesis Forecast: 19% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 23% 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 0.4 1.0% -2.0 1.0 1.2% VORTICITY 1.6 1.9 7.2% 1.5 1.6 7.1% VERTICAL SHEAR 12.9 9.7 6.8% 14.9 14.1 11.6% RH 79.1 71.6 2.7% 74.8 64.0 1.8% GOES 42.9 7.5 0.5% 42.8 7.5 0.5% DVORAK 0.9 0.5 0.8% 0.9 0.5 0.6% --------------------------------------------------------------------------------------------- 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