*          ATLANTIC TC GENESIS INDEX           *
                      *           AL952015 09/15/15 00 UTC           *

TIME (hr)           0     6    12    18    24    36    48    60    72    84    96   108   120
TCGI (%)                                             59.6                                59.6

HDIV (x10-7s-1)   1.0   0.0   0.0  -2.0  -2.0  -2.0  -2.0  -1.0   2.0   2.0   1.0   1.0  -1.0
VORT (x10-6s-1)   2.0   1.9   2.2   2.4   2.4   2.6   2.6   2.8   2.1   1.9   1.1   0.4  -0.3
DV24 (x10-6s-1)   0.4   0.7   0.4   0.4   0.2   0.2  -0.5  -0.9  -1.0  -1.5  -1.4  -1.7  -1.3
VSHD (kt)          13    15    13    13    10     9     9     7     8    15    12    24    22
MLRH (%)           85    83    83    85    83    84    84    85    83    83    80    79    81
PCCD (%)           76   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A
TNUM             1.00   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A

LAT  (deg N)      8.9   9.1   9.4   9.6   9.7  10.1  10.7  11.6  12.7  13.9  15.0  16.1  17.3
LON  (deg W)     21.3  22.3  23.3  24.2  25.0  26.5  27.8  29.0  30.1  31.4  32.7  34.0  35.0
DTL  (km)         611   694   780   860   936  1080  1204  1295  1383  1503  1634  1777  1892
TRACK SOURCE     BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG  BAMG

Prob of Genesis (t= 48h) =  59.6 is  2.1 times the sample mean ( 27.9)
Prob of Genesis (t=120h) =  59.6 is  1.5 times the sample mean ( 40.3)

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CONTRIBUTIONS OF CLIMATOLOGY AND INDIVIDUAL PREDICTORS TO TCGI PROBABILITY  

               *******  48-HR ******   ******* 120-HR ******
                   AVG   FCST  %CONT       AVG   FCST  %CONT
CLIM (%)                        27.9                     N/A
HDIV (x10-7s-1)   -1.3   -1.4    2.3      -1.3   -1.4    2.3
DV24 (x10-6s-1)   -0.2    0.1    7.6      -0.2    0.1    7.6
VSHD (kt)         16.8   11.0    7.4      16.8   11.0    7.4
MLRH (%)          64.9   84.1   -1.0      64.9   84.1   -1.0
PCCD (%)          29.1   75.9   12.8      29.1   75.9   12.8
TNUM               0.9    1.0    2.5       0.9    1.0    2.5

%CONT = % contribution to TCGI probability

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PREDICTOR DEFINITIONS (Averaged Over 500 km Radius)

CLIM = Climatological Probability of Genesis (Source: NHC-TAFB Invest Database) 
HDIV = 850-mb GFS Horizontal Divergence
DV24 = 24-hr Change in GFS 850-mb Vorticity (VORT)
VSHD = 850-200 mb GFS Vertical Shear
MLRH = 600-mb GFS Relative Humidity
PCCD = % GOES WV Pixels Colder Than -40C
TNUM = TAFB T-Number