000
FZNT02 KNHC 310932
HSFAT2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1030 UTC THU AUG 31 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC THU AUG 31.
24 HOUR FORECAST VALID 0600 UTC FRI SEP 01.
48 HOUR FORECAST VALID 0600 UTC SAT SEP 02.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM IRMA NEAR 16.5N 32.9W 997 MB AT 0900 UTC AUG 31 
MOVING W OR 280 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 60 KT 
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM NW AND SE 
QUADRANTS...50 NM NE QUADRANT AND 30 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 60 NM OF CENTER EXCEPT 30 NM SW QUADRANT WITH 
SEAS TO 22 FT. OVER FORECAST WATERS WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT. 
.12 HOUR FORECAST HURRICANE IRMA NEAR 17.0N 34.2W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. LITTLE CHANGE IN RADII OF 
TROPICAL STORM FORCE WINDS AND 12 FT SEAS. OVER FORECAST WATERS 
FROM 17N TO 21N N TO NE WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. 
.24 HOUR FORECAST HURRICANE IRMA NEAR 17.6N 36.0W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS 
WITHIN 80 NM NW AND SE QUADRANTS...90 NM NE QUADRANT AND 60 NM 
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM N AND 75 NM S 
SEMICIRCLES WITH SEAS TO 27 FT. ELSEWHERE OVER FORECAST WATERS 
WITHIN 240 NM N AND 120 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 
8 TO 12 FT.  
.48 HOUR FORECAST HURRICANE IRMA NEAR 18.2N 40.1W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM N SEMICIRCLE...90 NM SE QUADRANT AND 60 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM N AND 90 NM S 
SEMICIRCLES WITH SEAS TO 34 FT. ELSEWHERE WITHIN 300 NM N AND 
120 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.72 HOUR FORECAST HURRICANE IRMA NEAR 17.5N 45.0W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE IRMA NEAR 16.7N 49.5W. MAXIMUM 
SUSTAINED WINDS 105 KT GUSTS 130 KT.
.120 HOUR FORECAST HURRICANE IRMA NEAR 16.0N 53.5W. MAXIMUM 
SUSTAINED WINDS 105 KT GUSTS 130 KT.

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

.SYNOPSIS AND FORECAST.

.ATLC 18 HOUR FORECAST N OF 30N BETWEEN 55W AND 60W WINDS 20 KT 
OR LESS. SEAS 8 FT IN NE SWELL.
.24 HOUR FORECAST N OF 29.5N BETWEEN 53W AND 58W...AND N OF 30N 
BETWEEN 58W AND 65W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE 
SWELL.
.36 HOUR FORECAST N OF 29N BETWEEN 50W AND 65W WINDS 20 KT OR 
LESS. SEAS 8 TO 10 FT IN NE SWELL. 
.48 HOUR FORECAST N OF A LINE FROM 31N40W TO 25N50W TO 25N58W TO 
31N58W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE SWELL. 

.CARIBBEAN FROM 11N TO 13.5N BETWEEN 70W AND 74W...INCLUDING THE 
GULF OF VENEZUELA NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 11N TO 15N BETWEEN 70W AND 76W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS BUILDING TO 8 FT. FROM 15N TO 17.5N BETWEEN 70W AND 74W E 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11N TO 15N BETWEEN 69W AND 78W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS TO 9 FT. FROM 15N TO 17.5N BETWEEN 70W AND 76W E WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT.

.GULF OF MEXICO N OF 28N BETWEEN 87W AND 93W S TO SW WINDS 20 TO 
25 KT. SEAS TO 8 FT. 
.12 HOUR FORECAST N OF 29N BETWEEN 86W AND 92W S TO SW WINDS 20 
TO 25 KT. SEAS TO 8 FT E OF 90W.
.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 GR. NATIONAL HURRICANE CENTER.