* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP932020 08/14/20 12 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 29% 63% LAT (deg N) 19.0 19.6 20.1 20.8 21.5 22.9 23.3 21.5 22.4 22.7 22.5 22.3 21.6 LON (deg W) 109.9 111.1 112.3 113.4 114.6 118.1 121.1 121.0 123.6 126.1 128.3 130.3 132.1 DTL (km) 433 383 391 421 435 612 789 925 1053 1251 1461 1657 1850 TRACK SOURCE AP13 AP13 AP13 AP13 AP13 AP13 AP13 AP13 AP13 AP13 AP13 AP13 AP13 TCGI 0-48h Genesis Forecast: 29% is 0.7 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 63% is 1.1 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 -0.1 1.8% -2.0 0.4 3.7% VORTICITY 1.6 2.0 10.2% 1.5 2.4 21.3% VERTICAL SHEAR 12.9 14.1 7.6% 14.9 10.6 26.6% RH 79.1 72.9 4.1% 74.8 70.6 5.1% GOES 42.9 12.5 1.3% 42.8 12.5 1.7% DVORAK 0.9 1.0 4.1% 0.9 1.0 4.5% --------------------------------------------------------------------------------------------- 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