[Tropical] Tropical Cyclone Discussion
EMWIN Server
emwin at nashvilleweather.net
Tue Sep 11 09:44:21 CDT 2007
WTNT42 KNHC 111444
TCDAT2
TROPICAL DEPRESSION GABRIELLE DISCUSSION NUMBER 16
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL072007
1100 AM EDT TUE SEP 11 2007
THUNDERSTORM ACTIVITY CONTINUES OVER THE SOUTHEASTERN PORTION OF
GABRIELLE. HOWEVER...A 1000 UTC QUIKSCAT OVERPASS INDICATES THAT
THE CIRCULATION HAS BECOME ILL-DEFINED AND ELONGATED SOUTHEAST TO
NORTHWEST. IN FACT...THE VORTICITY CENTER THAT HAS BEEN TRACKED IN
SATELLITE IMAGERY OVERNIGHT IS LOCATED AT THE SOUTHEASTERN END OF A
TROUGH CHARACTERIZED BY LIGHT AND VARIABLE WINDS. SINCE A
WELL-DEFINED SURFACE CIRCULATION NO LONGER EXISTS...THIS SYSTEM NO
LONGER QUALIFIES AS A TROPICAL CYCLONE AND THIS WILL BE THE LAST
ADVISORY ISSUED ON GABRIELLE. AN ILL-DEFINED REMNANT LOW COULD
PERSIST FOR A FEW MORE HOURS BUT SHOULD DISSIPATE IN THE INCREASING
SOUTHWESTERLY FLOW AHEAD OF A DEVELOPING EXTRATROPICAL LOW OVER
EASTERN NORTH AMERICA.
ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS
FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS
HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC.
FORECAST POSITIONS AND MAX WINDS
INITIAL 11/1500Z 39.6N 65.3W 30 KT...DISSIPATING
12HR VT 12/0000Z 40.9N 61.4W 25 KT...REMNANT LOW
24HR VT 12/1200Z...DISSIPATED
$$
FORECASTER BROWN
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