* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992020 07/19/20 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 34% 34% LAT (deg N) 14.8 15.8 16.9 17.9 19.0 20.6 20.9 20.7 19.6 19.9 20.0 21.2 23.4 LON (deg W) 127.2 128.4 129.4 130.2 131.2 132.8 134.1 135.9 138.0 138.4 139.4 139.7 139.7 DTL (km) 1913 1920 1912 1905 1919 1973 2039 1976 1759 1713 1608 1586 1615 TRACK SOURCE AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 34% is 0.8 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 34% is 0.6 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 0.8 1.2% -2.0 0.8 2.1% VORTICITY 1.6 1.2 8.0% 1.5 0.4 4.9% VERTICAL SHEAR 12.9 6.4 12.1% 14.9 8.8 19.5% RH 79.1 76.9 5.5% 74.8 58.5 2.1% GOES 42.9 21.5 2.7% 42.8 21.5 2.2% DVORAK 0.9 1.0 4.6% 0.9 1.0 3.2% --------------------------------------------------------------------------------------------- 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