Hurricane Katrina

Forecast Advisory 20

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000
WTNT22 KNHC 280603
TCMAT2
HURRICANE KATRINA SPECIAL FORECAST/ADVISORY NUMBER 20
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL122005
0600Z SUN AUG 28 2005

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.

HURRICANE CENTER LOCATED NEAR 25.1N 86.8W AT 28/0600Z
POSITION ACCURATE WITHIN 10 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 7 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 935 MB
EYE DIAMETER 30 NM
MAX SUSTAINED WINDS 125 KT WITH GUSTS TO 150 KT.
64 KT....... 60NE 45SE 45SW 45NW.
50 KT....... 80NE 80SE 65SW 80NW.
34 KT.......140NE 100SE 100SW 140NW.
12 FT SEAS..275NE 150SE 150SW 275NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 25.1N 86.8W AT 28/0600Z
AT 28/0000Z CENTER WAS LOCATED NEAR 24.9N 85.9W

FORECAST VALID 28/1200Z 25.5N 87.5W
MAX WIND 125 KT...GUSTS 150 KT.
64 KT... 60NE 45SE 45SW 45NW.
50 KT... 80NE 80SE 65SW 80NW.
34 KT...140NE 100SE 100SW 140NW.

FORECAST VALID 29/0000Z 27.0N 89.0W
MAX WIND 130 KT...GUSTS 160 KT.
64 KT... 60NE 45SE 45SW 45NW.
50 KT... 80NE 80SE 65SW 80NW.
34 KT...140NE 100SE 100SW 140NW.

FORECAST VALID 29/1200Z 29.0N 89.8W
MAX WIND 130 KT...GUSTS 160 KT.
64 KT... 60NE 45SE 45SW 45NW.
50 KT... 80NE 80SE 65SW 80NW.
34 KT...140NE 100SE 100SW 140NW.

FORECAST VALID 30/0000Z 31.0N 89.8W...INLAND
MAX WIND 90 KT...GUSTS 110 KT.
50 KT... 40NE 40SE 0SW 0NW.
34 KT... 60NE 60SE 30SW 30NW.

FORECAST VALID 31/0000Z 36.5N 87.0W...INLAND
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 60NE 60SE 30SW 30NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM
ON DAY 4 AND 325 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 01/0000Z 41.0N 80.5W...EXTRATROPICAL
MAX WIND 30 KT...GUSTS 40 KT.

OUTLOOK VALID 02/0000Z 45.5N 71.5W...EXTRATROPICAL
MAX WIND 25 KT...GUSTS 35 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 25.1N 86.8W

NEXT ADVISORY AT 28/0900Z

FORECASTER KNABB


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