* NE PACIFIC TC GENESIS INDEX * * GFS VERSION * * EP932019 09/27/19 00 UTC * TIME (hr) 0 6 12 18 24 36 48 60 72 84 96 108 120 Prob of Genesis 15% 55% LAT (deg N) 17.9 17.8 17.4 16.7 16.0 14.2 13.6 14.7 17.2 19.6 22.1 19.9 20.8 LON (deg W) 111.4 110.8 110.0 109.3 108.6 107.6 106.6 104.5 103.1 105.8 107.7 107.9 108.9 DTL (km) 574 572 561 545 536 635 627 409 94 58 180 236 259 TRACK SOURCE AP14 AP14 AP14 AP14 AP14 AP14 AP14 AP14 AP14 AP14 AP14 AP14 AP14 TCGI 0-48h Genesis Forecast: 15% is 0.4 times the sample mean ( 44%) TCGI 0-120h Genesis Forecast: 55% is 1.0 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 -1.0 1.7% -2.0 -3.4 11.6% VORTICITY 1.6 1.7 6.1% 1.5 1.7 15.1% VERTICAL SHEAR 12.9 27.6 1.3% 14.9 24.3 17.6% RH 79.1 77.5 3.3% 74.8 79.0 6.0% GOES 42.9 29.1 2.2% 42.8 29.1 3.9% DVORAK 0.9 0.5 0.8% 0.9 0.5 1.2% --------------------------------------------------------------------------------------------- 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