* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP092021 08/02/21 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 43% 63% LAT (deg N) 12.1 12.7 13.0 13.4 13.3 13.5 15.1 16.4 17.3 18.1 19.0 20.0 20.3 LON (deg W) 130.3 131.2 131.6 132.2 132.7 132.5 132.2 132.8 134.4 135.9 137.6 139.6 142.6 DTL (km) 2364 2380 2386 2400 2447 2415 2270 2227 2164 1994 1805 1590 1277 TRACK SOURCE AP29 AP29 AP29 AP29 AP29 AP29 AP29 AP29 AP29 AP29 AP29 AP29 AP29 TCGI 0-48h Genesis Forecast: 43% is 1.0 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 63% 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 -2.0 4.5% -2.0 -0.3 5.5% VORTICITY 1.6 1.6 11.7% 1.5 1.9 17.5% VERTICAL SHEAR 12.9 9.0 12.8% 14.9 10.7 26.5% RH 79.1 76.5 6.4% 74.8 77.5 6.3% GOES 42.9 18.4 2.7% 42.8 18.4 2.6% DVORAK 0.9 1.0 5.4% 0.9 1.0 4.5% --------------------------------------------------------------------------------------------- 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