* 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 59% 79% LAT (deg N) 13.6 13.6 13.5 13.3 13.2 12.6 12.2 11.9 11.9 12.0 12.5 13.1 13.6 LON (deg W) 123.8 124.4 125.1 125.7 126.1 126.8 127.6 128.8 130.1 131.3 132.4 133.9 135.0 DTL (km) 1733 1777 1839 1901 1940 2041 2135 2254 2362 2446 2487 2339 2208 TRACK SOURCE AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN TCGI 0-48h Genesis Forecast: 59% is 1.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 79% is 1.4 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 5.1% -2.0 -0.7 7.3% VORTICITY 1.6 2.2 17.6% 1.5 2.1 21.9% VERTICAL SHEAR 12.9 10.3 14.5% 14.9 10.1 30.9% RH 79.1 74.9 7.1% 74.8 75.7 6.9% GOES 42.9 18.1 3.1% 42.8 18.1 3.0% DVORAK 0.9 1.5 11.1% 0.9 1.5 8.9% --------------------------------------------------------------------------------------------- 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