* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992021 07/30/21 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 72% 81% LAT (deg N) 13.6 13.3 12.8 12.4 12.1 12.4 12.2 11.9 12.0 12.3 12.4 12.2 12.4 LON (deg W) 124.5 125.3 126.1 126.3 126.3 126.9 128.3 130.0 131.1 132.8 134.5 136.2 137.1 DTL (km) 1785 1870 1971 2018 2041 2064 2191 2353 2431 2483 2307 2147 2049 TRACK SOURCE AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 TCGI 0-48h Genesis Forecast: 72% is 1.6 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 81% is 1.4 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 -0.2 3.3% -2.0 0.8 3.4% VORTICITY 1.6 2.5 21.1% 1.5 2.3 23.8% VERTICAL SHEAR 12.9 7.7 17.9% 14.9 10.6 31.0% RH 79.1 77.7 8.9% 74.8 76.0 7.0% GOES 42.9 16.9 3.2% 42.8 16.9 2.8% DVORAK 0.9 2.0 17.4% 0.9 2.0 12.8% --------------------------------------------------------------------------------------------- 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