*          ATLANTIC TC GENESIS INDEX           *
                      *                GFS VERSION                   *
                      *           AL912020 09/03/20 12 UTC           *

TIME (hr)           0     6    12    18    24    36    48    60    72    84    96   108   120
Prob of Genesis                                       10%                                 46%

LAT  (deg N)     11.8  11.3  11.0  10.6  10.4   9.9   9.8  10.4  11.3  11.5  11.4  11.5  11.4
LON  (deg W)     35.6  35.9  36.8  37.7  38.5  39.3  40.2  39.7  38.3  35.7  33.4  32.4  32.1
DTL  (km)        1704  1642  1584  1521  1487  1410  1359  1442  1589  1669  1749  1653  1624
TRACK SOURCE     AP10  AP10  AP10  AP10  AP10  AP10  AP10  AP10  AP10  AP10  AP10  AP10  AP10

TCGI  0-48h Genesis Forecast:   10% is  0.3 times the sample mean (  30%)
TCGI 0-120h Genesis Forecast:   46% is  1.1 times the sample mean (  43%)

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INDIVIDUAL PREDICTOR CONTRIBUTIONS TO PROBABILITY OF GENESIS 

               *******  48-HR ******   ******* 120-HR ******
                   AVG   TCGI   CONT       AVG   TCGI   CONT
DIVERGENCE        -1.0   -1.2   2.8%       1.0   -1.5  12.8%
VORTICITY          1.7    1.3   2.5%       1.4    1.4  13.0%
VERTICAL SHEAR    16.3   22.8   4.2%      18.4   18.3  15.4%
RH                73.1   71.7  -0.1%      70.9   74.5   3.1%
GOES              29.1    9.1   0.2%      29.3    9.1   0.3%
DVORAK             0.8    0.5   0.6%       0.8    0.5   1.5%

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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