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HURRICANE ISAAC ADVISORY NUMBER  11
NATIONAL WEATHER SERVICE MIAMI FL
11 PM AST SAT SEP 23 2000

...ISAAC RAPIDLY STRENGTHENS FAR FROM LAND AND IS NOW A 
MAJOR HURRICANE...
 
AT 11 PM AST...0300Z...THE CENTER OF MAJOR HURRICANE ISAAC
WAS LOCATED NEAR LATITUDE 15.0 NORTH...LONGITUDE  35.4 WEST
OR ABOUT 1720 MILES...2770 KM...EAST OF THE LEEWARD ISLANDS.
 
ISAAC IS MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH...17 KM/HR...
AND THIS MOTION IS EXPECTED TO CONTINUE FOR THE NEXT 24 HOURS.
 
MAXIMUM SUSTAINED WINDS HAVE RAPIDLY INCREASED AND ARE NEAR 
120 MPH...195 KM/HR...WITH HIGHER GUSTS.  THIS MAKES ISAAC A
CATEGORY 3 HURRICANE ON THE SAFFIR-SIMPSON HURRICANE INTENSITY
SCALE.  SOME ADDITIONAL STRENGTHENING IS FORECAST AND ISAAC COULD
BECOME A CATEGORY 4 HURRICANE 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 115 MILES...185 KM.
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS  955 MB...28.20 INCHES.
 
REPEATING THE 11 PM AST POSITION...15.0 N... 35.4 W.  MOVEMENT
TOWARD...WEST-NORTHWEST NEAR 10 MPH.  MAXIMUM SUSTAINED
WINDS...120 MPH.  MINIMUM CENTRAL PRESSURE... 955 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER 
AT 5 AM AST...SUNDAY.
 
FORECASTER STEWART
 
 
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