* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992021 07/29/21 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 47% 55% LAT (deg N) 13.9 14.8 15.0 14.9 14.6 13.9 13.5 12.9 12.6 12.3 12.1 11.9 12.0 LON (deg W) 119.0 119.9 121.4 122.4 123.0 124.0 125.5 127.1 128.4 130.1 131.9 132.8 132.7 DTL (km) 1378 1366 1445 1524 1593 1723 1869 2042 2170 2333 2481 2500 2506 TRACK SOURCE AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 AP04 TCGI 0-48h Genesis Forecast: 47% is 1.1 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 55% 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 -1.3 3.9% -2.0 0.6 3.0% VORTICITY 1.6 1.9 13.5% 1.5 1.8 15.3% VERTICAL SHEAR 12.9 12.0 11.8% 14.9 12.8 23.2% RH 79.1 74.1 5.9% 74.8 71.0 4.7% GOES 42.9 13.7 2.0% 42.8 13.7 1.7% DVORAK 0.9 1.5 9.7% 0.9 1.5 7.1% --------------------------------------------------------------------------------------------- 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