000
FZNT02 KNHC 310233
HSFAT2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC THU AUG 31.
24 HOUR FORECAST VALID 0000 UTC FRI SEP 01.
48 HOUR FORECAST VALID 0000 UTC SAT SEP 02.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM IRMA NEAR 16.4N 32.2W 999 MB AT 0300 UTC AUG 31 
MOVING W OR 275 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 55 KT 
GUSTS 65 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 45 NM NE QUADRANT...30 NM SE QUADRANT...AND 60 
NM NW QUADRANT WITH SEAS TO 18 FT.  OVER FORECAST WATERS WINDS 
20 KT OR LESS. SEAS LESS THAN 8 FT. 
.12 HOUR FORECAST HURRICANE IRMA NEAR 16.8N 33.6W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. LITTLE CHANGE IN RADII OF 
TROPICAL STORM FORCE WINDS AND 12 FT SEAS.  OVER FORECAST WATERS 
WITHIN 180 NM NW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. 
.24 HOUR FORECAST HURRICANE IRMA NEAR 17.3N 35.5W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 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 18.0N 39.5W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NE QUADRANT...90 NM SE QUADRANT...60 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. WINDS 20 TO 33 KT AND SEAS 12 
FT OR GREATER WITHIN 180 NM N AND 90 NM S SEMICIRCLES WITH SEAS 
TO 33 FT. ELSEWHERE WITHIN 330 NM N AND 180 NM S SEMICIRCLES 
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT. 
.72 HOUR FORECAST HURRICANE IRMA NEAR 17.6N 44.3W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE IRMA NEAR 16.8N 49.0W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT.
.120 HOUR FORECAST HURRICANE IRMA NEAR 16.2N 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.

.TROPICAL DEPRESSION HARVEY NEAR 31.7N 92.3W 998 MB AT 0300 UTC 
AUG 31 MOVING NNE OR 030 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 30 
KT GUSTS 40 KT.  OVER FORECAST WATERS N OF 27N BETWEEN 86W 
AND 94W WINDS 20 TO 250 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST TROPICAL DEPRESSION HARVEY INLAND NEAR 34.5N 
89.7W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. OVER FORECAST 
WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST TROPICAL DEPRESSION HARVEY INLAND NEAR 37.0N 
85.7W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. 
.72 HOUR FORECAST...DISSIPATED.

.ATLC 24 HOUR FORECAST N OF 30N BETWEEN 55W AND 60W WINDS 20 KT 
OR LESS. SEAS 8 FT IN NE SWELL.
.48 HOUR FORECAST N OF 28N BETWEEN 45W AND 57W WINDS 20 KT OR 
LESS. SEAS 8 TO 10 FT IN NE SWELL. 

.CARIBBEAN 06 HOUR FORECAST S OF 14N BETWEEN 70W AND 74W NE TO E 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 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 COBB. NATIONAL HURRICANE CENTER.