* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP082021 07/31/21 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 100% 100% LAT (deg N) 12.9 13.0 13.9 14.4 14.8 15.6 16.6 17.5 17.8 17.7 18.5 19.8 20.7 LON (deg W) 114.7 115.9 117.3 118.8 119.8 121.8 124.2 126.9 129.0 130.1 130.5 131.8 133.4 DTL (km) 1217 1264 1261 1323 1360 1423 1536 1673 1814 1911 1891 1925 2012 TRACK SOURCE AP17 AP17 AP17 AP17 AP17 AP17 AP17 AP17 AP17 AP17 AP17 AP17 AP17 TCGI 0-48h Genesis Forecast: 100% is 2.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 100% is 1.8 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 -4.6 10.4% -2.0 -1.5 9.0% VORTICITY 1.6 3.1 27.1% 1.5 3.4 31.9% VERTICAL SHEAR 12.9 8.2 18.8% 14.9 9.5 30.0% RH 79.1 85.6 9.4% 74.8 83.7 5.7% GOES 42.9 47.5 10.3% 42.8 47.5 7.7% DVORAK 0.9 2.5 24.0% 0.9 2.5 15.7% --------------------------------------------------------------------------------------------- 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