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WTNT32 KNHC 280610
TCPAT2
BULLETIN
HURRICANE KATRINA SPECIAL ADVISORY NUMBER  20
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1 AM CDT SUN AUG 28 2005

...KATRINA STRENGTHENS TO CATEGORY FOUR WITH 145 MPH WINDS...

A HURRICANE WARNING IS IN EFFECT FOR THE NORTH CENTRAL GULF COAST
FROM MORGAN CITY LOUISIANA EASTWARD TO THE ALABAMA/FLORIDA
BORDER...INCLUDING THE CITY OF NEW ORLEANS AND LAKE PONTCHARTRAIN.
A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
WITHIN THE WARNING AREA WITHIN THE NEXT 24 HOURS. PREPARATIONS TO
PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION.

A TROPICAL STORM WARNING AND A HURRICANE WATCH ARE IN EFFECT FROM
EAST OF THE ALABAMA/FLORIDA BORDER TO DESTIN FLORIDA...AND FROM
WEST OF MORGAN CITY TO INTRACOASTAL CITY LOUISIANA. A TROPICAL
STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED
WITHIN THE WARNING AREA WITHIN THE NEXT 24 HOURS. A HURRICANE WATCH
MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH
AREA...GENERALLY WITHIN 36 HOURS.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA...INCLUDING POSSIBLE
INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED
BY YOUR LOCAL WEATHER OFFICE.

AT 1 AM CDT...0600Z...THE CENTER OF HURRICANE KATRINA WAS LOCATED
NEAR LATITUDE 25.1 NORTH... LONGITUDE 86.8 WEST OR ABOUT 310
MILES... 500 KM... SOUTH-SOUTHEAST OF THE MOUTH OF THE MISSISSIPPI
RIVER.

KATRINA IS MOVING TOWARD THE WEST-NORTHWEST NEAR  8 MPH.  A GRADUAL
TURN TOWARD THE NORTHWEST IS EXPECTED LATER TODAY.

REPORTS FROM AN AIR FORCE RECONNAISSANCE AIRCRAFT INDICATE THAT
MAXIMUM SUSTAINED WINDS HAVE INCREASED AND ARE NOW NEAR 145
MPH...WITH HIGHER GUSTS. KATRINA IS A CATEGORY FOUR HURRICANE ON
THE SAFFIR-SIMPSON SCALE. SOME ADDITIONAL STRENGTHENING IS POSSIBLE
TODAY.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  70 MILES...110 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 160 MILES...260 KM.

THE MINIMUM CENTRAL PRESSURE RECENTLY REPORTED BY THE RECONNAISSANCE
AIRCRAFT WAS 935 MB...27.61 INCHES.

COASTAL STORM SURGE FLOODING OF 15 TO 20 FEET ABOVE NORMAL TIDE
LEVELS...LOCALLY AS HIGH AS 25 FEET ALONG WITH LARGE AND DANGEROUS
BATTERING WAVES...CAN BE EXPECTED NEAR AND TO THE EAST OF WHERE THE
CENTER MAKES LANDFALL.

HEAVY RAINS FROM KATRINA SHOULD BEGIN TO AFFECT THE CENTRAL GULF
COAST SUNDAY EVENING. RAINFALL TOTALS OF 5 TO 10 INCHES...WITH
ISOLATED MAXIMUM AMOUNTS OF 15 INCHES...ARE POSSIBLE ALONG THE PATH
OF KATRINA.  THE HURRICANE IS STILL EXPECTED TO PRODUCE ADDITIONAL
RAINFALL AMOUNTS OF 2 TO 4 INCHES OVER EXTREME WESTERN CUBA...AND 1
TO 3 INCHES OF RAINFALL IS EXPECTED OVER THE YUCATAN PENINSULA.

REPEATING THE 1 AM CDT POSITION...25.1 N... 86.8 W.  MOVEMENT
TOWARD...WEST-NORTHWEST NEAR  8 MPH.  MAXIMUM SUSTAINED
WINDS...145 MPH.  MINIMUM CENTRAL PRESSURE... 935 MB.

THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
4 AM CDT.

FORECASTER KNABB


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