* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP992021 07/30/21 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 72% 88% LAT (deg N) 13.7 13.6 13.3 13.0 12.6 12.4 12.3 12.3 12.6 13.1 13.4 13.8 13.9 LON (deg W) 124.3 124.8 125.4 125.9 126.2 126.9 128.0 129.7 131.1 133.0 134.4 135.8 137.3 DTL (km) 1762 1808 1877 1939 1994 2064 2159 2299 2381 2431 2277 2119 1963 TRACK SOURCE AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN AEMN TCGI 0-48h Genesis Forecast: 72% is 1.7 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 88% is 1.6 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 -1.6 5.3% -2.0 -0.4 7.0% VORTICITY 1.6 2.6 21.7% 1.5 2.3 24.9% VERTICAL SHEAR 12.9 10.4 16.0% 14.9 9.7 33.0% RH 79.1 76.5 8.4% 74.8 74.3 7.0% GOES 42.9 16.9 3.2% 42.8 16.9 2.9% DVORAK 0.9 2.0 17.4% 0.9 2.0 13.4% --------------------------------------------------------------------------------------------- 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