* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992020 07/19/20 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 31% 47% LAT (deg N) 13.1 14.1 15.2 16.0 16.4 17.1 17.1 16.8 16.8 16.7 16.7 13.6 14.4 LON (deg W) 125.1 125.7 126.7 127.5 128.4 130.3 131.7 132.9 134.2 136.8 140.7 143.5 147.4 DTL (km) 1870 1839 1843 1838 1872 1970 2086 2209 2195 1926 1521 1370 969 TRACK SOURCE AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 TCGI 0-48h Genesis Forecast: 31% is 0.7 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 47% is 0.8 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 -0.6 2.3% -2.0 0.2 3.5% VORTICITY 1.6 1.2 7.7% 1.5 1.8 13.6% VERTICAL SHEAR 12.9 7.7 10.7% 14.9 13.1 20.6% RH 79.1 78.9 5.6% 74.8 74.6 4.7% GOES 42.9 28.2 3.4% 42.8 28.2 3.3% DVORAK 0.9 0.5 1.2% 0.9 0.5 1.1% --------------------------------------------------------------------------------------------- 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