000
FZNT02 KNHC 211510
HSFAT2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC SUN AUG 21 2011

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE 
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE 
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

PAN PAN

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND 
GULF OF MEXICO

SYNOPSIS VALID 1200 UTC SUN AUG 21.
24 HOUR FORECAST VALID 1200 UTC MON AUG 22.
48 HOUR FORECAST VALID 1200 UTC TUE AUG 23.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM IRENE NEAR 17.0N 63.2W 1007 MB AT 1500 UTC AUG 
21 MOVING W NW OR 285 DEG AT 17 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM NE AND 
WITHIN 70 NM NW QUADRANTS...AND INCREASING TO WITHIN 40 NM S 
SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 360 NM NE AND WITHIN 45 
NM NW QUADRANTS WITH SEAS TO 21 FT.
.24 HOUR FORECAST HURRICANE IRENE NEAR 18.2N 68.2W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM S SEMICIRCLE...130 NM NE AND 90 NM NW QUADRANTS. 
SEAS 12 FT OR GREATER WITHIN 360 NM NE AND WITHIN 120 NM SW 
SEMICIRCLES WITH SEAS TO 24 FT.
.48 HOUR FORECAST TROPICAL STORM IRENE INLAND NEAR 19.6N 73.3W. 
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE 
WINDS WITHIN 140 NM NE...90 NM SE...60 NM SW...AND 110 NM NW 
QUADRANTS. SEAS 12 FT OR GREATER WITHIN 360 NM NE AND WITHIN 120 
NM SW SEMICIRCLES WITH SEAS TO 21 FT.
.72 HOUR FORECAST TROPICAL STORM IRENE OVER WATER NEAR 21.5N 
76.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE IRENE NEAR 24.0N 79.0W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST TROPICAL STORM IRENE INLAND NEAR 27.0N 81.5W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.

.SYNOPSIS AND FORECAST.

.ATLC AND CARIBBEAN EXCEPT AS NOTED IN IRENE WARNING...WITHIN 
660 NM NE QUADRANT...270 NM SE AND NW QUADRANTS...AND 180 SW 
QUADRANTS WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. NUMEROUS TSTMS IN 
BANDS WITHIN 300 NM N AND 90 NM S OF CENTER. 
.24 HOUR FORECAST EXCEPT AS NOTED IN IRENE WARNING...WITHIN 660 
NM NE QUADRANT...330 NM SE AND NW QUADRANTS...AND 180 SW 
QUADRANTS WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. SCATTERED TSTMS IN
BANDS WITHIN 300 NM N AND 90 NM S OF CENTER. 
.48 HOUR FORECAST EXCEPT AS NOTED IN IRENE WARNING...WITHIN 540 
NM NE QUADRANT...480 NM SE...360 NW QUADRANT...AND 180 SW 
QUADRANTS WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. SCATTERED TSTMS IN 
BANDS WITHIN 300 NM OF CENTER. 

.ATLC FROM 20N TO 27N E OF 40W NE TO E WINDS 20 KT. SEAS TO 9 FT 
IN NE SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LOW PRES NEAR 23N37W 1010 MB. WITHIN 420 NM N 
AND WITHIN 20 NM S SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 13 
FT.

.GULF OF MEXICO TROUGH S OF 23N ALONG 92W. WITHIN 60 NM OF 
TROUGH NE TO E WINDS 20 KT. SEAS LESS THAN 8 FT. SCATTERED TSTMS.
.24 HOUR FORECAST TROUGH S OF 23N ALONG 95W. WITHIN 60 NM OF 
TROUGH NE TO E WINDS 20 KT. SEAS LESS THAN 8 FT. SCATTERED TSTMS.
.36 HOUR FORECAST WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT. 

.REMAINDER OF AREA WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.