* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP922020 08/12/20 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 50% 53% LAT (deg N) 12.7 12.6 13.1 13.8 14.3 15.0 15.4 15.5 15.3 15.2 15.0 14.8 14.9 LON (deg W) 124.9 125.1 125.2 125.4 126.0 127.7 129.2 130.6 131.5 132.2 132.6 133.9 134.8 DTL (km) 1888 1911 1878 1838 1849 1936 2012 2112 2199 2263 2310 2279 2183 TRACK SOURCE AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 TCGI 0-48h Genesis Forecast: 50% is 1.1 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 53% is 0.9 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 -3.1 6.2% -2.0 -0.4 5.1% VORTICITY 1.6 1.6 12.5% 1.5 1.3 11.7% VERTICAL SHEAR 12.9 10.7 13.0% 14.9 13.2 22.4% RH 79.1 74.4 6.3% 74.8 72.5 4.8% GOES 42.9 36.6 6.1% 42.8 36.6 4.7% DVORAK 0.9 1.0 5.9% 0.9 1.0 4.0% --------------------------------------------------------------------------------------------- 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