* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP132019 09/25/19 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 10% 18% LAT (deg N) 19.4 19.4 19.1 19.1 18.8 20.6 22.0 23.4 24.5 25.4 25.7 25.5 24.6 LON (deg W) 140.8 141.4 141.9 142.4 143.3 142.1 142.7 143.2 144.0 144.8 145.6 146.2 146.9 DTL (km) 1466 1404 1353 1301 1209 1326 1281 1274 1239 1212 1171 1101 994 TRACK SOURCE AP18 AP18 AP18 AP18 AP18 TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 10% is 0.2 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 18% is 0.3 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 2.4 0.0% -2.0 1.8 0.2% VORTICITY 1.6 0.4 2.7% 1.5 0.5 3.4% VERTICAL SHEAR 12.9 28.4 1.1% 14.9 24.8 8.9% RH 79.1 51.9 0.0% 74.8 47.2 0.5% GOES 42.9 18.2 1.3% 42.8 18.2 1.2% DVORAK 0.9 1.5 4.6% 0.9 1.5 3.6% --------------------------------------------------------------------------------------------- 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