* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992021 07/30/21 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 58% 58% LAT (deg N) 14.0 14.0 14.1 13.9 13.8 13.5 13.3 13.2 12.8 12.2 12.4 12.2 12.9 LON (deg W) 123.9 124.5 125.1 125.6 126.0 126.5 127.8 128.7 130.0 131.1 131.3 131.6 130.7 DTL (km) 1708 1753 1792 1847 1886 1948 2069 2151 2285 2414 2412 2451 2327 TRACK SOURCE AP01 AP01 AP01 AP01 AP01 AP01 AP01 AP01 AP01 AP01 AP01 AP01 AP01 TCGI 0-48h Genesis Forecast: 58% is 1.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 58% is 1.0 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 -0.9 3.8% -2.0 1.0 2.1% VORTICITY 1.6 2.5 19.3% 1.5 2.2 18.6% VERTICAL SHEAR 12.9 12.3 13.1% 14.9 18.7 21.2% RH 79.1 75.8 7.3% 74.8 76.7 5.9% GOES 42.9 18.1 3.1% 42.8 18.1 2.5% DVORAK 0.9 1.5 11.0% 0.9 1.5 7.4% --------------------------------------------------------------------------------------------- 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