* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992020 07/20/20 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 14% 17% LAT (deg N) 19.1 19.7 20.3 21.0 21.6 23.0 24.4 25.7 26.4 26.5 26.4 26.2 26.3 LON (deg W) 127.5 128.8 130.1 131.4 132.8 135.2 137.0 138.0 138.2 138.4 138.9 140.1 141.6 DTL (km) 1594 1665 1738 1824 1888 1943 1911 1859 1861 1850 1793 1682 1544 TRACK SOURCE TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 14% is 0.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 17% 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 -0.2 1.2% -2.0 0.3 1.8% VORTICITY 1.6 -0.5 0.4% 1.5 -0.8 0.0% VERTICAL SHEAR 12.9 10.0 6.1% 14.9 19.0 10.4% RH 79.1 59.1 0.7% 74.8 40.1 0.0% GOES 42.9 10.3 0.7% 42.8 10.3 0.7% 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