Tropical Storm Irwin

Forecast Advisory 4

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000
WTPZ24 KNHC 261454
TCMEP4
TROPICAL STORM IRWIN FORECAST/ADVISORY NUMBER 4
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP092005
1500Z FRI AUG 26 2005

TROPICAL STORM CENTER LOCATED NEAR 17.8N 109.2W AT 26/1500Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 10 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1000 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT....... 40NE 60SE 60SW 40NW.
12 FT SEAS.. 60NE 60SE 60SW 60NW.
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 17.8N 109.2W AT 26/1500Z
AT 26/1200Z CENTER WAS LOCATED NEAR 17.7N 108.7W

FORECAST VALID 27/0000Z 18.0N 110.7W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 40NE 60SE 60SW 40NW.

FORECAST VALID 27/1200Z 18.1N 112.6W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 15NE 15SE 15SW 15NW.
34 KT... 60NE 60SE 60SW 60NW.

FORECAST VALID 28/0000Z 18.3N 114.6W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 15NE 15SE 15SW 15NW.
34 KT... 60NE 60SE 60SW 60NW.

FORECAST VALID 28/1200Z 18.3N 116.4W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 15NE 15SE 15SW 15NW.
34 KT... 60NE 60SE 60SW 60NW.

FORECAST VALID 29/1200Z 18.2N 120.1W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 10NE 10SE 10SW 10NW.
34 KT... 60NE 60SE 60SW 60NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 200 NM
ON DAY 4 AND 250 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 30/1200Z 18.0N 123.5W
MAX WIND 40 KT...GUSTS 50 KT.

OUTLOOK VALID 31/1200Z 17.5N 126.5W...DISSIPATING
MAX WIND 30 KT...GUSTS 40 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.8N 109.2W

NEXT ADVISORY AT 26/2100Z

FORECASTER SISKO/STEWART


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