* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP972019 07/20/19 18 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 67% 92% LAT (deg N) 11.3 10.8 10.1 10.9 12.2 14.1 15.3 16.6 17.8 19.2 20.2 21.6 22.7 LON (deg W) 115.7 116.5 117.6 117.4 117.3 118.2 119.4 120.0 120.6 121.4 122.4 123.8 125.5 DTL (km) 1424 1511 1636 1548 1418 1304 1289 1212 1159 1125 1130 1124 1197 TRACK SOURCE AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 TCGI 0-48h Genesis Forecast: 67% is 1.5 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 92% 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 -2.1 5.9% -2.0 -1.2 9.0% VORTICITY 1.6 2.9 23.5% 1.5 3.0 30.0% VERTICAL SHEAR 12.9 12.7 13.9% 14.9 9.3 32.3% RH 79.1 78.5 8.9% 74.8 77.7 7.5% GOES 42.9 64.4 12.9% 42.8 64.4 11.3% DVORAK 0.9 0.5 2.0% 0.9 0.5 1.5% --------------------------------------------------------------------------------------------- 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