* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP942019 08/15/19 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 15% 19% LAT (deg N) 17.1 17.7 18.4 18.5 19.0 20.7 20.1 19.3 18.6 18.3 18.2 18.1 18.3 LON (deg W) 127.8 128.1 128.4 129.6 131.3 131.9 134.5 137.1 139.4 141.2 142.3 143.0 143.5 DTL (km) 1772 1749 1722 1814 1928 1887 2121 1856 1618 1440 1318 1251 1195 TRACK SOURCE AP08 AP08 AP08 AP08 AP08 TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 15% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 19% 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 1.2 0.4% -2.0 1.7 0.3% VORTICITY 1.6 1.1 4.6% 1.5 0.6 3.7% VERTICAL SHEAR 12.9 10.0 6.2% 14.9 13.3 11.8% RH 79.1 74.5 2.9% 74.8 66.8 2.1% GOES 42.9 7.5 0.5% 42.8 7.5 0.5% DVORAK 0.9 0.5 0.8% 0.9 0.5 0.6% --------------------------------------------------------------------------------------------- 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