* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP902019 09/12/19 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 87% 91% LAT (deg N) 15.4 15.7 16.0 16.2 16.4 17.3 17.8 18.4 19.2 20.2 21.1 22.0 22.7 LON (deg W) 110.4 111.4 112.4 113.3 114.4 116.0 118.2 119.9 121.3 123.0 124.5 125.0 124.8 DTL (km) 726 791 806 820 856 882 989 1059 1116 1171 1215 1196 1136 TRACK SOURCE AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 AP07 TCGI 0-48h Genesis Forecast: 87% is 2.0 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 91% is 1.6 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 -3.0 7.8% -2.0 -1.2 8.9% VORTICITY 1.6 2.3 21.1% 1.5 2.2 23.8% VERTICAL SHEAR 12.9 4.5 21.3% 14.9 10.7 31.5% RH 79.1 81.3 10.7% 74.8 74.9 6.9% GOES 42.9 60.9 13.2% 42.8 60.9 10.7% DVORAK 0.9 1.5 12.9% 0.9 1.5 9.2% --------------------------------------------------------------------------------------------- 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