* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP902020 07/20/20 06 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 46% 69% LAT (deg N) 15.0 14.0 13.2 12.6 12.2 11.4 10.1 10.0 10.4 11.1 11.7 13.1 13.9 LON (deg W) 119.7 120.4 121.0 122.1 123.4 126.0 128.9 132.2 135.4 138.8 142.3 145.6 149.1 DTL (km) 1335 1470 1580 1703 1824 2076 2400 2648 2315 1952 1594 1211 869 TRACK SOURCE AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 TCGI 0-48h Genesis Forecast: 46% is 1.1 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 69% is 1.2 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 -0.2 2.6% -2.0 0.4 4.0% VORTICITY 1.6 1.1 9.2% 1.5 1.5 15.4% VERTICAL SHEAR 12.9 6.9 14.5% 14.9 7.2 30.1% RH 79.1 72.4 5.4% 74.8 75.1 6.2% GOES 42.9 31.2 4.9% 42.8 31.2 4.8% DVORAK 0.9 1.5 9.7% 0.9 1.5 8.2% --------------------------------------------------------------------------------------------- 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