* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP062021 07/22/21 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 12% 15% LAT (deg N) 10.6 10.7 11.0 11.4 11.9 12.9 13.4 13.1 12.7 12.3 12.0 11.9 12.2 LON (deg W) 147.7 147.9 149.1 149.8 150.8 153.4 156.5 160.6 163.3 165.9 168.6 171.3 174.1 DTL (km) 1248 1226 1121 1039 932 706 618 833 1065 1259 1446 1663 1870 TRACK SOURCE AP25 AP25 AP25 AP25 AP25 AP25 AP25 TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 12% is 0.3 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 15% is 0.3 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 0.3 0.9% -2.0 -0.2 2.5% VORTICITY 1.6 1.1 4.5% 1.5 0.5 3.4% VERTICAL SHEAR 12.9 22.7 2.7% 14.9 35.6 6.1% RH 79.1 69.7 2.2% 74.8 66.5 2.1% GOES 42.9 10.2 0.7% 42.8 10.2 0.7% DVORAK 0.9 0.5 0.8% 0.9 0.5 0.6% --------------------------------------------------------------------------------------------- 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