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 953 
 WTNT43 KNHC 060856
 TCDAT3
 TROPICAL STORM HANNA DISCUSSION NUMBER  38
 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL082008
 500 AM EDT SAT SEP 06 2008
  
 NATIONAL WEATHER SERVICE WSR-88D RADAR DATA...AND SURFACE
 OBSERVATIONS...SHOW THAT THE CENTER OF HANNA CAME ASHORE AT ABOUT
 0720 UTC NEAR THE BORDER BETWEEN SOUTH CAROLINA AND NORTH CAROLINA. 
 PRIOR TO LANDFALL...AN AIR FORCE RECONNAISSANCE AIRCRAFT MEASURED A
 CENTRAL PRESSURE OF 983 MB...BUT FLIGHT-LEVEL AND SFMR DATA DID NOT
 REVEAL ANY INCREASE IN THE WINDS...NOR DID WSR-88D RADAR
 VELOCITIES.  THE INTENSITY APPEARED TO BE 55 TO 60 KT WHILE THE
 CENTER WAS STILL OVER WATER...BUT NOW THAT IT IS INLAND THE MAXIMUM
 WINDS HAVE PROBABLY COME DOWN TO ABOUT 50 KT.  SLIGHT WEAKENING IS
 FORECAST AS HANNA WILL BE MOVING ROUGHLY PARALLEL TO THE EAST COAST
 OF THE UNITED STATES DURING THE NEXT DAY OR SO.  LITTLE CHANGE IN
 STRENGTH IS ANTICIPATED THEREAFTER AS HANNA BECOMES AN
 EXTRATROPICAL CYCLONE NEAR OR OVER SOUTHEASTERN CANADA.
 
 HANNA IS ROUNDING THE MID-LEVEL RIDGE OVER THE WESTERN
 ATLANTIC...TURNING RIGHT AND ACCELERATING.  THE INITIAL MOTION
 ESTIMATE IS ABOUT 020/19...BUT HANNA SHOULD TURN NORTHEASTWARD
 WITHIN THE NEXT 24 HOURS AS IT ENTERS THE MID-LATITUDE WESTERLIES. 
 THE NEW OFFICIAL FORECAST TRACK IS ADJUSTED SLIGHTLY TO THE LEFT OF
 THE PREVIOUS ONE...AND IS NOW CLOSE TO A CONSENSUS OF THE
 TIGHTLY-CLUSTERED MODEL SOLUTIONS. 
  
  
  
 FORECAST POSITIONS AND MAX WINDS
  
 INITIAL      06/0900Z 34.4N  78.3W    50 KT
  12HR VT     06/1800Z 37.3N  76.7W    50 KT...INLAND
  24HR VT     07/0600Z 41.2N  72.2W    45 KT...NEAR COAST
  36HR VT     07/1800Z 45.0N  64.8W    45 KT...INLAND EXTRATROPICAL
  48HR VT     08/0600Z 48.2N  56.2W    45 KT...INLAND EXTRATROPICAL
  72HR VT     09/0600Z 50.5N  38.5W    45 KT...EXTRATROPICAL
  96HR VT     10/0600Z 54.5N  20.5W    45 KT...EXTRATROPICAL
 120HR VT     11/0600Z 58.5N  11.5W    45 KT...EXTRATROPICAL
  
 $$
 FORECASTER KNABB
  
 
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