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HURRICANE ISAAC ADVISORY NUMBER  21
NATIONAL WEATHER SERVICE MIAMI FL
11 AM AST TUE SEP 26 2000

...ISAAC WEAKENS A LITTLE...
 
AT 11 AM AST...1500Z...THE CENTER OF HURRICANE ISAAC WAS LOCATED
NEAR LATITUDE 18.8 NORTH...LONGITUDE  44.4 WEST OR ABOUT 1140
MILES...1840 KM...EAST OF THE NORTHERN LEEWARD ISLANDS.
 
ISAAC IS MOVING TOWARD THE WEST-NORTHWEST NEAR 12 MPH...19 KM/HR...
AND THIS MOTION IS EXPECTED TO CONTINUE FOR THE NEXT 24 HOURS.

SATELLITE PICTURES THIS MORNING SHOW THAT ISAAC HAS WEAKENED. 
MAXIMUM SUSTAINED WINDS ARE NEAR  90 MPH...150 KM/HR...WITH HIGHER
GUSTS.  A LITTLE MORE WEAKENING MAY OCCUR DURING THE NEXT 24 HOURS.
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  30 MILES... 45 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 160 MILES...260 KM.
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS  975 MB...28.79 INCHES.
 
REPEATING THE 11 AM AST POSITION...18.8 N... 44.4 W.  MOVEMENT
TOWARD...WEST NORTHWEST NEAR 12 MPH.  MAXIMUM SUSTAINED WINDS... 90
MPH.  MINIMUM CENTRAL PRESSURE... 975 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
5 PM AST.
 
FORECASTER PASCH
 
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