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Hurricane HELENE


ZCZC MIATCDAT3 ALL
TTAA00 KNHC DDHHMM
HURRICANE HELENE SPECIAL DISCUSSION NUMBER  45
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL082006
800 AM EDT SAT SEP 23 2006
 
THIS SPECIAL ADVISORY IS BEING ISSUED TO UPDATE THE INITIAL AND
FORECAST INTENSITY AND WIND RADII FOR HELENE. THE TRACK FORECAST IS
UNCHANGED FROM THE PREVIOUS ADVISORY. A RECENT QUIKSCAT PASS
INDICATES THAT HELENE CONTAINS A LARGE AREA OF HURRICANE FORCE
WINDS SOUTHWEST OF THE CENTER.  THE ADVISORY INTENSITY OF 80 KT IS
BASED ON THE STRONGEST WIND IN THE QUIKSCAT DATA...WHICH WAS
OUTSIDE OF DEEP CONVECTION IN THE SOUTHWEST QUADRANT.  THE WIND
RADII HAVE BEEN EXPANDED ALSO BASED ON THE QUIKSCAT DATA.  EVEN
THOUGH HELENE HAS STRENGTHENED...IT CONTINUES TO LOSE TROPICAL
CHARACTERISTICS AND IS EXPECTED TO TRANSFORM INTO AN EXTRATROPICAL
CYCLONE LATER TODAY.  
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      23/1200Z 37.4N  47.2W    80 KT
 12HR VT     23/1800Z 38.2N  44.8W    75 KT...EXTRATROPICAL
 24HR VT     24/0600Z 39.7N  40.3W    70 KT...EXTRATROPICAL
 36HR VT     24/1800Z 41.5N  35.8W    65 KT...EXTRATROPICAL
 48HR VT     25/0600Z 43.3N  31.7W    60 KT...EXTRATROPICAL
 72HR VT     26/0600Z 46.8N  23.9W    55 KT...EXTRATROPICAL
 96HR VT     27/0600Z 50.4N  16.5W    45 KT...EXTRATROPICAL
120HR VT     28/0600Z 55.0N  10.0W    40 KT...EXTRATROPICAL
 
$$
FORECASTER RHOME/KNABB
 
NNNN


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Page last modified: Saturday, 23-Sep-2006 12:30:02 UTC