* 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% 94% LAT (deg N) 14.9 15.3 15.6 15.9 16.3 17.3 17.8 18.0 18.7 19.7 20.9 22.5 24.3 LON (deg W) 110.8 111.6 112.4 113.3 114.1 116.4 118.8 120.5 122.0 123.6 124.7 125.0 124.6 DTL (km) 794 835 849 851 849 912 1028 1136 1209 1255 1245 1165 1034 TRACK SOURCE AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 AP03 TCGI 0-48h Genesis Forecast: 87% is 2.0 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 94% is 1.7 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 -2.8 7.4% -2.0 -1.1 8.6% VORTICITY 1.6 2.6 23.1% 1.5 2.8 27.7% VERTICAL SHEAR 12.9 6.6 19.7% 14.9 9.9 31.3% RH 79.1 82.0 11.0% 74.8 74.7 6.7% GOES 42.9 60.9 13.2% 42.8 60.9 10.4% DVORAK 0.9 1.5 12.9% 0.9 1.5 9.0% --------------------------------------------------------------------------------------------- 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