000
FZNT02 KNHC 212230
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC TUE AUG 21 2012

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC TUE AUG 21
24 HOUR FORECAST VALID 1800 UTC WED AUG 22
48 HOUR FORECAST VALID 1800 UTC THU AUG 23

.WARNINGS.

...ATLC/CARIBBEAN HURRICANE WARNING...
.TROPICAL STORM ISAAC NEAR 15.4N 53.9W 1006 MB AT 2100 UTC AUG 
21 MOVING W OR 275 DEG AT 15 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM NE 
QUADRANT. SEAS TO 12 FT WITHIN 40 NM NE QUADRANT.
.24 HOUR FORECAST TROPICAL STORM ISAAC NEAR 15.9N 59.8W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 180 NM NE...60 NM SE AND 120 NM NW QUADRANTS WITH 
SEAS TO 16 FT.
.48 HOUR FORECAST HURRICANE ISAAC NEAR 16.6N 66.3W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS
WITHIN 90 NM N SEMICIRCLE...60 NM SE QUADRANT AND 40 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 270 NM NE...90 NM SE AND 
180 NM NW QUADRANTS WITH SEAS TO 20 FT.
.72 HOUR FORECAST HURRICANE ISAAC NEAR 17.0N 71.0W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE ISAAC NEAR 19.5N 75.0W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT.
.120 HOUR FORECAST HURRICANE ISAAC INLAND NEAR 21.5N 78.0W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.

FORECAST WINDS NEAR TROPICAL CYCLONES SHOULD BE USED WITH CAUTION
DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY.

.SYNOPSIS AND FORECAST.

.CARIBBEAN AND ATLC EXCEPT AS NOTED IN WARNINGS...WITHIN 150 NM 
N SEMICIRCLE OF ISAAC WINDS 20 TO 33 KT. SEAS 9 TO 11 FT. 
ELSEWHERE FROM 15N TO 22N BETWEEN 44W AND 57W NE TO E WINDS 20 
TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS...WITHIN 300 NM NE 
SEMICIRCLE OF ISAAC WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. ELSEWHERE
FROM 15N TO 24N BETWEEN 52W AND 64W NE TO E WINDS 20 TO 25 KT. 
SEAS 8 TO 10 FT.
.48 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS...WITHIN 360 NM N 
SEMICIRCLE OF ISAAC WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
ELSEWHERE FROM 14N TO 24N BETWEEN 54W AND 70W NE TO E WINDS 20 
TO 25 KT EXCEPT E TO SE BETWEEN 54W AND 61W. SEAS 8 TO 10 FT.

.ATLC 12 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...E 
OF AREA NEAR 11N34W 1009 MB. OVER FORECAST WATERS WITHIN 180 NM 
N SEMICIRCLE OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
12N37W 1008 MB. WITHIN 240 NM N SEMICIRCLE...120 NM SE QUADRANT
AND 60 NM SW QUADRANT OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N42W 1007 MB. WITHIN 300 NM N AND 120 NM S SEMICIRCLES OF
LOW WINDS 20 TO 30 KT. SEAS 8 TO 12 FT...HIGHEST IN N SEMICIRCLE.

.CARIBBEAN FROM 12N TO 15N BETWEEN 72W AND 78W NE TO E WINDS 20 
TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.