000
FZNT02 KNHC 151013
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC TUE AUG 15 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE AUG 15.
24 HOUR FORECAST VALID 0600 UTC WED AUG 16.
48 HOUR FORECAST VALID 0600 UTC THU AUG 17.

.WARNINGS.

...ATLC HURRICANE WARNING... 
.HURRICANE GERT NEAR 31.8N 72.5W 986 MB AT 0900 UTC AUG 15 
MOVING N OR 360 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 65 KT 
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NE 
QUADRANT...80 NM SE QUADRANT...30 NM SW QUADRANT...AND 60 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM W SEMICIRCLE...160 
NM NE QUADRANT AND 150 NM SE QUADRANT WITH SEAS TO 24 FT.
ELSEWHERE OVER FORECAST WATERS WITHIN 180 NM OF CENTER EXCEPT 
120 NM SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST HURRICANE GERT NEAR 35.5N 68.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM E SEMICIRCLE AND 60 NM W SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 150 NM NE QUADRANT...180 NM SE AND NW QUADRANTS 
AND 120 NM SW QUADRANT WITH SEAS TO 32 FT. ELSEWHERE WITHIN 240 
NM SE AND 90 NM NW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 
FT. OVER FORECAST WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 
FT.
.48 HOUR FORECAST HURRICANE GERT NEAR 40.0N 57.0W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NE AND SW QUADRANTS...60 NM NW QUADRANT AND 120 NM 
SE QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM W SEMICIRCLE... 
120 NM NE QUADRANT AND 180 NM SE QUADRANT WITH SEAS TO 36 FT. 
ELSEWHERE WITHIN 300 NM SE AND 120 NM NW SEMICIRCLES WINDS 20 TO 
33 KT. SEAS 8 TO 11 FT. OVER FORECAST WATERS WINDS 20 KT OR 
LESS. SEAS LESS THAN 8 FT.
.72 HOUR FORECAST POST-TROPICAL EXTRATROPICAL GERT NEAR 46.5N 
41.0W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL GERT NEAR 52.0N 
36.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST...DISSIPATED.

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 LOW PRES NEAR 12N39W 1012 MB. FROM 13N TO 17N BETWEEN 38W 
AND 42W NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW PRES NEAR 14N42W 1011 MB. FROM 14N TO 19N 
BETWEEN 42W AND 46W NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW PRES NEAR 15N46W 1010 MB. FROM 15N TO 19N 
BETWEEN 42W AND 47W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.

.ATLC 30 HOUR FORECAST S OF 21N BETWEEN 71W AND 73W NE TO E 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST S OF 21N BETWEEN 73W AND 75W...INCLUDING 
WINDWARD PASSAGE...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT.

.CARIBBEAN FROM 11N TO 14N BETWEEN 74W AND 78W NE WINDS 20 TO 25 
KT. SEAS 8 TO 10 FT.
.12 HOUR FORECAST FROM 11N TO 13N BETWEEN 72W AND 75W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST FROM 12N TO 154 BETWEEN 73W AND 78W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.42 HOUR FORECAST FROM 11.5N TO 13N BETWEEN 73W AND 76W NE TO E 
WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.CARIBBEAN 30 HOUR FORECAST WITHIN 30 NM OF LINE FROM 17N70W TO 
17N73W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF MEXICO 48 HOUR FORECAST FROM 20N TO 22N BETWEEN 90W AND 
92W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.