* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP922019 08/12/19 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 13% 19% LAT (deg N) 18.3 18.8 20.6 20.9 21.4 22.3 23.2 24.3 25.3 26.4 27.3 28.1 28.5 LON (deg W) 108.7 109.6 108.6 109.8 110.9 113.2 115.7 118.1 120.4 122.1 123.2 123.6 123.5 DTL (km) 391 445 289 220 188 289 389 496 602 715 771 770 741 TRACK SOURCE AP02 AP02 TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 13% is 0.3 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 1.0 0.6% -2.0 1.0 1.1% VORTICITY 1.6 0.2 2.4% 1.5 0.2 2.4% VERTICAL SHEAR 12.9 15.9 4.5% 14.9 16.5 11.0% RH 79.1 65.3 1.6% 74.8 49.7 0.7% GOES 42.9 40.6 3.1% 42.8 40.6 2.8% 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