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Tropical Storm GABRIELLE (Text)

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TROPICAL STORM GABRIELLE SPECIAL DISCUSSION NUMBER   9
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL072013
130 PM AST TUE SEP 10 2013
 
A PAIR OF ASCAT PASSES FROM 1342Z AND 1436Z INDICATE THAT GABRIELLE
IS STRONGER THAN PREVIOUSLY ESTIMATED. BOTH PASSES SHOWED SEVERAL
45-KT WIND RETRIEVALS...AND THAT IS THE INITIAL INTENSITY FOR THIS
SPECIAL ADVISORY. THE INTENSITY FORECAST HAS BEEN ADJUSTED UPWARD
AT 12 AND 24 HOURS TO 50 KT BASED ON THE INCREASE IN THE INITIAL
INTENSITY. THE ANALYZED 34-KT WIND RADII HAVE ALSO BEEN ADJUSTED
OUTWARD BASED ON THE ASCAT DATA...AND THEIR FORECAST HAS BEEN
MODIFIED AS WELL TO REFLECT THE LARGER WIND FIELD. AN AIR FORCE
RESERVE AIRCRAFT WILL INVESTIGATE GABRIELLE LATER THIS AFTERNOON TO
PROVIDE MORE DETAILED INFORMATION ON THE STRENGTH AND STRUCTURE OF
THE CYCLONE.

NO CHANGES WERE MADE TO THE PREVIOUS TRACK FORECAST FOR THIS SPECIAL
ADVISORY. 

NOTE THAT THIS SPECIAL ADVISORY TAKES THE PLACE OF THE 200 PM
AST/1800 UTC INTERMEDIATE ADVISORY. 
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  10/1730Z 30.9N  64.8W   45 KT  50 MPH
 12H  11/0000Z 31.9N  64.9W   50 KT  60 MPH
 24H  11/1200Z 33.1N  65.2W   50 KT  60 MPH
 36H  12/0000Z 34.0N  65.8W   45 KT  50 MPH
 48H  12/1200Z 35.2N  66.2W   45 KT  50 MPH
 72H  13/1200Z 39.5N  65.0W   45 KT  50 MPH
 96H  14/1200Z 49.0N  56.5W   45 KT  50 MPH...POST-TROP/EXTRATROP
120H  15/1200Z...DISSIPATED
 
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FORECASTER BRENNAN
 
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