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HURRICANE HUMBERTO DISCUSSION NUMBER  23
NATIONAL WEATHER SERVICE MIAMI FL
11 PM EDT WED SEP 26 2001
 
CANADIAN BUOY 44141 REPORTED A 990.0 MB PRESSURE NEAR THE CENTER
AT 21Z...AND AN SSM/I OVERPASS AT 2310Z SHOWED A PARTIAL EYEWALL
OVER THE NORTH SEMICIRCLE.  SINCE THEN...IR SATELLITE IMAGERY
SUGGESTS THAT ALBERTO HAS DECREASED CONSIDERABLY IN ORGANIZATION.
WHILE SATELLITE INTENSITY ESTIMATES FROM TAFB AND SAB REMAIN 90
KT...THE MAXIMUM INTENSITY WILL BE DECREASED TO 70 KT BASED ON THE
OBSERVED CHANGES SINCE THE PREVIOUS PACKAGE.

HUMBERTO HAS ACCELERATED EASTWARD DURING THE PAST 6 HR AND IS
NOW MOVING 080/20.  AN GENERAL EASTWARD MOTION AND GRADUAL
ACCELERATION ARE LIKELY DURING THE REMAINDER OF THE CYCLONE'S
LIFE AS IT BECOMES MORE EMBEDDED IN THE WESTERLIES.

BUOY 44141 REPORTED A 20C SEA SURFACE TEMPERATURE...WHILE ANOTHER
CANADIAN BUOY JUST NORTH OF THE FORECAST TRACK REPORTED A 15C SST.
THE COMBINATION OF COLDER WATER AND INCREASING SHEAR SHOULD 
CAUSE ALBERTO TO WEAKEN AND BECOME EXTRATROPICAL IN 24-36 HR.
BY 48 HR THE SYSTEM SHOULD LOSE ITS INDENTITY IN A LARGER LOW
OVER THE EASTERN ATLANTIC.
 
FORECASTER BEVEN
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL     27/0300Z 42.3N  53.3W    65 KTS
12HR VT     27/1200Z 42.5N  48.9W    55 KTS
24HR VT     28/0000Z 42.5N  42.5W    45 KTS...EXTRATROPICAL
36HR VT     28/1200Z 42.0N  35.0W    35 KTS...EXTRATROPICAL
48HR VT     29/0000Z...ABSORBED BY LARGE EXTRATROPICAL LOW
 
 
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