Tropical Storm HANNA
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TROPICAL STORM HANNA DISCUSSION NUMBER 39
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082008
1100 AM EDT SAT SEP 06 2008
THE CENTER OF HANNA IS MOVING INTO SOUTHEASTERN VIRGINA...WITH
SATELLITE IMAGERY SHOWING A CONVECTIVE OVERCAST JUST NORTH OF THE
CENTER...AND RADAR DATA SHOWING WIDESPREAD RAINBANDS OVER THE
NORTHERN SEMICIRCLE. WHILE THERE ARE NO RECENT OBSERVATIONS OF
SUSTAINED TROPICAL STORM-FORCE WINDS...IT IS ESTIMATED THAT THE
MAXIMUM WINDS REMAIN 45 KT IN THE EASTERN SEMICIRCLE IN AREAS NOT
CURRENTLY SAMPLED. WHILE LITTLE CHANGE IN STRENGTH IS LIKELY
THROUGH THE FORECAST PERIOD...HANNA IS EXPECTED TO LOSE TROPICAL
CHARACTERISTICS IN ABOUT 24 HOURS.
THE INITIAL MOTION IS NOW 025/22. HANNA IS ROUNDING THE END OF THE
WESTERN ATLANTIC RIDGE AND SHOULD ACCELERATE NORTHEASTWARD INTO THE
WESTERLIES DURING THE NEXT 24-48 HR. AFTER THAT...THE SYSTEM
SHOULD MOVE GENERALLY EAST-NORTHEASTWARD FOR THE REMAINDER OF THE
FORECAST PERIOD. THE MODEL GUIDANCE IS TIGHTLY CLUSTERED AROUND
THIS SCENARIO...AND NEW FORECAST TRACK IS ESSENTIALLY AN UPDATE OF
THE PREVIOUS TRACK.
FORECAST POSITIONS AND MAX WINDS
INITIAL 06/1500Z 36.6N 77.4W 45 KT
12HR VT 07/0000Z 39.7N 74.7W 45 KT...INLAND
24HR VT 07/1200Z 43.5N 68.4W 45 KT...INLAND EXTRATROPICAL
36HR VT 08/0000Z 46.8N 60.1W 45 KT...EXTRATROPICAL
48HR VT 08/1200Z 49.0N 51.6W 45 KT...EXTRATROPICAL
72HR VT 09/1200Z 51.0N 34.0W 45 KT...EXTRATROPICAL
96HR VT 10/1200Z 55.0N 19.0W 45 KT...EXTRATROPICAL
120HR VT 11/1200Z 59.0N 10.5W 45 KT...EXTRATROPICAL
$$
FORECASTER BEVEN
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