* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP072020 07/21/20 18 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 16% 22% LAT (deg N) 19.0 18.7 18.4 18.0 17.5 16.5 15.5 15.0 15.0 14.9 14.3 13.3 12.1 LON (deg W) 134.6 135.7 137.0 138.3 139.8 142.9 145.9 148.2 148.9 149.6 150.7 152.5 154.8 DTL (km) 2119 2007 1874 1744 1596 1301 1042 863 796 749 721 708 762 TRACK SOURCE AEMI AEMI AEMI AEMI AEMI AEMI AEMI TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 16% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 22% is 0.4 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 0.7 0.7% -2.0 0.7 1.4% VORTICITY 1.6 0.8 3.7% 1.5 0.5 3.5% VERTICAL SHEAR 12.9 4.2 7.7% 14.9 6.4 13.6% RH 79.1 58.3 0.6% 74.8 56.5 1.2% GOES 42.9 0.0 0.0% 42.8 0.0 0.0% DVORAK 0.9 1.0 2.7% 0.9 1.0 2.1% --------------------------------------------------------------------------------------------- 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