* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP942020 08/15/20 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 59% 60% LAT (deg N) 16.6 17.3 18.0 18.9 20.0 22.2 23.3 23.4 23.1 22.8 22.3 21.6 20.7 LON (deg W) 117.7 118.5 119.0 119.5 120.0 122.4 125.6 128.3 130.4 132.5 134.3 136.1 137.6 DTL (km) 1067 1052 1025 990 954 970 1174 1419 1612 1770 1933 1959 1799 TRACK SOURCE AP18 AP18 AP18 AP18 AP18 AP18 AP18 AP18 AP18 AP18 AP18 AP18 AP18 TCGI 0-48h Genesis Forecast: 59% is 1.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 60% is 1.1 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 2.2% -2.0 0.9 2.6% VORTICITY 1.6 2.7 20.5% 1.5 2.2 19.0% VERTICAL SHEAR 12.9 8.0 16.0% 14.9 12.5 24.6% RH 79.1 74.7 7.0% 74.8 65.8 4.1% GOES 42.9 34.6 6.3% 42.8 34.6 4.9% DVORAK 0.9 1.0 6.5% 0.9 1.0 4.4% --------------------------------------------------------------------------------------------- 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