* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP972019 08/19/19 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 41% 56% LAT (deg N) 11.5 11.7 12.1 12.5 14.2 14.3 14.1 13.5 12.9 12.3 12.2 12.7 13.7 LON (deg W) 117.9 118.4 118.9 119.5 118.5 120.8 123.6 126.3 128.1 129.2 129.8 130.5 131.8 DTL (km) 1519 1530 1526 1531 1316 1471 1680 1932 2124 2257 2317 2324 2342 TRACK SOURCE AP18 AP18 AP18 AP18 TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 41% is 1.0 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 56% is 1.0 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 -0.1 2.3% -2.0 0.2 4.0% VORTICITY 1.6 1.7 11.6% 1.5 1.3 12.5% VERTICAL SHEAR 12.9 15.3 9.1% 14.9 13.2 23.4% RH 79.1 76.9 6.2% 74.8 77.8 5.9% GOES 42.9 46.4 6.9% 42.8 46.4 6.3% DVORAK 0.9 1.0 5.2% 0.9 1.0 4.2% --------------------------------------------------------------------------------------------- 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