* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP982019 07/18/19 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 16% 20% LAT (deg N) 9.8 10.4 12.3 12.5 12.8 13.8 15.3 17.1 19.3 20.7 22.0 22.6 23.0 LON (deg W) 127.0 128.8 128.2 129.4 130.4 132.4 134.2 136.0 137.5 138.9 140.6 142.1 143.9 DTL (km) 2282 2369 2178 2259 2313 2386 2236 1996 1810 1662 1501 1361 1197 TRACK SOURCE AP07 AP07 TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TABM TCGI 0-48h Genesis Forecast: 16% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 20% is 0.4 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 -4.0 3.4% -2.0 -1.5 3.9% VORTICITY 1.6 0.5 3.1% 1.5 0.6 3.6% VERTICAL SHEAR 12.9 17.8 4.0% 14.9 25.7 8.6% RH 79.1 79.3 3.6% 74.8 70.9 2.4% GOES 42.9 19.3 1.4% 42.8 19.3 1.3% 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