* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP952021 06/25/21 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 86% 100% LAT (deg N) 14.5 15.0 15.2 15.4 15.3 15.8 15.7 15.8 15.7 16.1 17.2 19.1 20.7 LON (deg W) 99.9 101.2 101.8 102.9 103.6 104.3 105.3 105.5 105.4 104.9 105.3 106.0 107.3 DTL (km) 235 241 247 289 311 291 355 358 361 295 226 107 169 TRACK SOURCE AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 AP15 TCGI 0-48h Genesis Forecast: 86% is 2.0 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 -4.1 9.5% -2.0 -8.5 25.0% VORTICITY 1.6 1.8 17.4% 1.5 2.4 21.6% VERTICAL SHEAR 12.9 7.7 18.8% 14.9 8.2 28.3% RH 79.1 85.5 9.4% 74.8 84.3 5.0% GOES 42.9 59.7 12.9% 42.8 59.7 8.9% DVORAK 0.9 2.0 18.2% 0.9 2.0 11.2% --------------------------------------------------------------------------------------------- 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