* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP092021 08/03/21 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 60% 60% LAT (deg N) 13.3 13.5 13.9 14.3 14.8 15.4 15.5 16.3 16.9 17.2 17.3 17.5 17.3 LON (deg W) 133.1 133.2 133.5 133.7 134.1 135.1 136.5 137.6 138.6 140.1 140.7 141.2 142.3 DTL (km) 2413 2395 2350 2316 2259 2137 1989 1853 1734 1571 1506 1450 1340 TRACK SOURCE AP10 AP10 AP10 AP10 AP10 AP10 AP10 AP10 AP10 AP10 AP10 AP10 AP10 TCGI 0-48h Genesis Forecast: 60% is 1.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 60% is 1.1 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 0.6 2.0% -2.0 1.0 2.3% VORTICITY 1.6 1.8 15.0% 1.5 1.5 14.3% VERTICAL SHEAR 12.9 8.4 16.0% 14.9 13.0 25.1% RH 79.1 79.8 8.8% 74.8 74.0 5.6% GOES 42.9 13.5 2.3% 42.8 13.5 1.9% DVORAK 0.9 2.0 16.0% 0.9 2.0 10.9% --------------------------------------------------------------------------------------------- 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