* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP942019 08/16/19 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 17% 21% LAT (deg N) 16.8 17.0 17.0 16.8 16.3 16.7 17.6 17.8 17.9 17.9 17.7 17.3 18.0 LON (deg W) 134.6 136.0 137.4 139.0 140.1 142.4 143.0 143.6 144.1 144.5 145.4 146.8 148.5 DTL (km) 2153 2003 1857 1695 1594 1346 1260 1194 1140 1098 1009 878 683 TRACK SOURCE AP20 AP20 AP20 AP20 AP20 AP20 AP20 AP20 AP20 AP20 AP20 AP20 AP20 TCGI 0-48h Genesis Forecast: 17% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 21% 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 1.2 0.4% -2.0 1.6 0.5% VORTICITY 1.6 1.7 6.0% 1.5 1.0 5.2% VERTICAL SHEAR 12.9 9.7 6.2% 14.9 13.5 11.7% RH 79.1 71.6 2.5% 74.8 64.0 1.9% GOES 42.9 9.6 0.6% 42.8 9.6 0.6% 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