* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP092021 08/02/21 18 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 62% 69% LAT (deg N) 13.3 13.2 13.2 13.6 14.0 16.0 17.9 20.9 21.3 21.8 21.9 21.5 21.3 LON (deg W) 129.6 130.1 130.1 129.9 129.5 128.6 128.9 130.3 133.5 136.4 139.2 140.8 142.9 DTL (km) 2214 2258 2258 2211 2148 1919 1798 1728 1965 1930 1643 1474 1255 TRACK SOURCE AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 AP06 TCGI 0-48h Genesis Forecast: 62% is 1.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 69% is 1.2 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 -1.8 5.2% -2.0 0.6 3.5% VORTICITY 1.6 2.2 18.2% 1.5 2.6 24.5% VERTICAL SHEAR 12.9 11.6 14.1% 14.9 17.7 24.2% RH 79.1 77.7 8.2% 74.8 69.5 5.2% GOES 42.9 24.3 4.5% 42.8 24.3 3.7% DVORAK 0.9 1.5 11.4% 0.9 1.5 8.3% --------------------------------------------------------------------------------------------- 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