*          ATLANTIC TC GENESIS INDEX           *
                      *           AL942015 07/30/15 06 UTC           *

TIME (hr)           0     6    12    18    24    36    48    60    72    84    96   108   120
TCGI (%)                                             29.6                                48.0

HDIV (x10-7s-1)   1.0   1.0   1.0   1.0  -1.0  -1.0   2.0   0.0  -3.0  -3.0  -1.0  -2.0   0.0
VORT (x10-6s-1)   1.8   2.0   2.0   2.0   1.6   1.6   1.1   0.7   0.9   0.9   0.9   0.8   0.5
DV24 (x10-6s-1)  -0.2  -0.4  -0.4  -0.6  -0.5  -0.9  -0.2   0.2   0.0  -0.1  -0.4  -0.6  -0.5
VSHD (kt)          10    14    13     8     8     8    10    12     9     9    14    12     6
MLRH (%)           77    76    79    80    81    76    73    70    69    69    70    76    79
PCCD (%)           56   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)     12.4  12.4  12.5  12.6  12.5  12.3  12.0  11.6  11.1  11.0  11.7  12.8  14.0
LON  (deg W)     24.9  26.1  27.0  28.0  29.0  30.9  32.5  33.6  34.1  34.5  35.0  35.7  36.5
DTL  (km)         842   966  1057  1159  1267  1473  1651  1760  1687  1660  1714  1808  1917
TRACK SOURCE     AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI  AVNI

Prob of Genesis (t= 48h) =  29.6 is  1.1 times the sample mean ( 27.9)
Prob of Genesis (t=120h) =  48.0 is  1.2 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                    40.3
HDIV (x10-7s-1)   -1.3    0.6   -4.8      -1.2   -0.7   -2.9
DV24 (x10-6s-1)   -0.2   -0.5   -4.7      -0.2   -0.3   -3.1
VSHD (kt)         16.8    9.7    5.4      19.0   10.0    8.1
MLRH (%)          64.9   77.1   -0.1      61.3   74.0   -0.4
PCCD (%)          29.1   56.4    4.4      28.7   56.4    4.2
TNUM               0.9    1.0    1.5       0.9    1.0    1.8

%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