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WTNT32 KNHC 280850
TCPAT2
BULLETIN
HURRICANE KATRINA ADVISORY NUMBER  21
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
4 AM CDT SUN AUG 28 2005

...DANGEROUS CATEGORY FOUR HURRICANE KATRINA CONTINUES
WEST-NORTHWESTWARD BUT EXPECTED TO TURN NORTHWARD...
...NEW TROPICAL STORM WARNINGS ISSUED FOR NORTHERN GULF COAST...

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.

AT 4 AM CDT...0900Z...A TROPICAL STORM WARNING HAS BEEN ISSUED FROM
DESTIN FLORIDA EASTWARD TO INDIAN PASS FLORIDA...AND FROM
INTRACOASTAL CITY LOUISIANA WESTWARD TO CAMERON LOUISIANA.
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED WITHIN THE WARNING AREA WITHIN THE NEXT 24 HOURS.

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

AT 4 AM CDT...0900Z...THE CENTER OF HURRICANE KATRINA WAS LOCATED
NEAR LATITUDE 25.4 NORTH... LONGITUDE 87.4 WEST OR ABOUT 275 MILES
SOUTH-SOUTHEAST OF THE MOUTH OF THE MISSISSIPPI RIVER.

KATRINA IS MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH.  A GRADUAL
TURN TOWARD THE NORTHWEST IS EXPECTED LATER TODAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 145 MPH WITH HIGHER GUSTS. KATRINA
IS A CATEGORY FOUR HURRICANE ON THE SAFFIR-SIMPSON SCALE. SOME
STRENGTHENING IS FORECAST DURING THE NEXT 24 HOURS.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  85 MILES FROM THE
CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 185 MILES.

ESTIMATED MINIMUM CENTRAL PRESSURE IS  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.

RAINFALL TOTALS OF 5 TO 10 INCHES...WITH ISOLATED MAXIMUM AMOUNTS OF
15 INCHES...ARE POSSIBLE ALONG THE PATH OF KATRINA ACROSS THE GULF
COAST AND THE SOUTHEASTERN UNITED STATES.  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.

ISOLATED TORNADOES WILL BE POSSIBLE BEGINNING SUNDAY EVENING OVER
SOUTHERN PORTIONS OF LOUISIANA...MISSISSIPPI...AND ALABAMA...AND
OVER THE FLORIDA PANHANDLE.

REPEATING THE 4 AM CDT POSITION...25.4 N... 87.4 W.  MOVEMENT
TOWARD...WEST-NORTHWEST NEAR 10 MPH.  MAXIMUM SUSTAINED
WINDS...145 MPH.  MINIMUM CENTRAL PRESSURE... 935 MB.

AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE
CENTER AT 7 AM CDT FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 10 AM
CDT.

FORECASTER KNABB


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