* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992019 07/27/19 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 51% 86% LAT (deg N) 12.7 12.8 13.1 13.3 13.6 14.3 15.4 16.6 17.2 17.0 16.0 15.3 15.3 LON (deg W) 120.8 122.2 123.4 124.7 126.0 128.8 131.9 135.8 140.1 143.7 145.7 146.4 146.3 DTL (km) 1614 1686 1748 1820 1900 2071 2229 2035 1571 1198 1033 1009 1016 TRACK SOURCE TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 51% is 1.2 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 86% is 1.5 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 -2.6 5.6% -2.0 -2.2 12.1% VORTICITY 1.6 0.8 8.2% 1.5 1.8 20.3% VERTICAL SHEAR 12.9 13.6 11.4% 14.9 14.1 29.8% RH 79.1 74.9 6.5% 74.8 67.7 5.5% GOES 42.9 52.8 9.0% 42.8 52.8 9.4% DVORAK 0.9 1.5 10.2% 0.9 1.5 9.4% --------------------------------------------------------------------------------------------- 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