High Seas Forecast
Issued by NWS

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000
FZNT01 KWBC 170400
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC THU AUG 17 2017

CCODE/2:31:04:11:00/AOW+AOE/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.
ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).

ATLANTIC ICEBERG ANALYSIS AND OUTLOOK PRODUCTS...COURTESY OF
THE U.S. COAST GUARD INTERNATIONAL ICE PATROL...CAN BE FOUND
ON THE OCEAN PREDICTION CENTER WEB PAGE AT
HTTP://WWW.OPC.NCEP.NOAA.GOV/ATL_TAB.SHTML(LOWERCASE).

PAN PAN

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W

SYNOPSIS VALID 0000 UTC AUG 17
24 HOUR FORECAST VALID 0000 UTC AUG 18
48 HOUR FORECAST VALID 0000 UTC AUG 19

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE GERT NEAR 40.1N 58.4W 967 MB AT 0300 UTC AUG 17
MOVING ENE OR 065 DEG AT 32 KT. MAXIMUM SUSTAINED WINDS 90 KT
GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NE
QUADRANT...120 NM SE QUADRANT...80 NM SW QUADRANT...AND 50 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM NW AND SE
QUADRANTS...120 NM NE QUADRANT AND 300 NM SW QUADRANT WITH SEAS
TO 40 FT. ELSEWHERE FROM 33N TO 43N BETWEEN 56W AND 67W WINDS 20
TO 33 KT. SEAS TO 11 FT.
.24 HOUR FORECAST TROPICAL STORM GERT NEAR 46.5N 43.8W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS
WITHIN 90 NM NE QUADRANT...150 NM SE QUADRANT...120 NM SW
QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
60 NM N SEMICIRCLE...180 NM SE AND 660 NM SW QUADRANTS WITH SEAS
TO 25 FT. ELSEWHERE FROM 40N TO 51N BETWEEN 36W AND 47W...AND
WITHIN 360 NM E OF A LINE FROM 50N50W TO 35N56W WINDS 20 TO 33
KT. SEAS TO 11 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE GERT NEAR 52.5N 35.0W
990 MB. WITHIN 200 NM NE...150 NM SE AND NW...AND 120 NM SW
QUADRANTS WINDS 34 TO 45 KT. SEAS 10 TO 18 FT. ELSEWHERE FROM
50N TO 56N BETWEEN 35W AND 42W...AND WITHIN 240 NM S OF A LINE
FROM 44N35W TO 37N50W TO 34N65W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.72 HOUR FORECAST POST-TROPICAL CYCLONE GERT E OF FORECAST AREA
NEAR 53.5N 31.5W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL CYCLONE GERT TO MERGE WITH
EXTRATROPICAL CYCLONE.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 50N52W 995 MB. WITHIN 240 NM N AND
NE...600 NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 48N46W 995 MB. WITHIN 360 NM S AND SW AND
480 NM W SEMICIRCLES WINDS 25 TO 40 KT. SEAS 9 TO 18 FT.

.SYNOPSIS AND FORECAST.

.LOW 61N43W 1005 MB MOVING SE 05 KT. WITHIN 120 NM S QUADRANT
WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LOW 60N41W 1011 MB. WINDS LESS THAN 25 KT.
SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LOW DISSIPATED.

.48 HOUR FORECAST LOW 66N56W 1004 MB. WITHIN 360 NM S QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 120 NM OF 48N47W AND 45N39W.
.48 HOUR FORECAST DENSE FOG E OF FORECAST AREA.

.HIGH 33N43W 1025 MB MOVING NE 10 KT.
.24 HOUR FORECAST HIGH 34N38W 1026 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 41N37W 1022 MB MOVING E 15 KT.
.24 HOUR FORECAST HIGH E OF AREA.

.HIGH 48N43W 1018 MB MOVING E 20 KT.
.24 HOUR FORECAST HIGH E OF AREA.

.HIGH 38N74W 1017 MB MOVING E 10 KT.
.24 HOUR FORECAST HIGH 38N68W 1018 MB.
.48 HOUR FORECAST HIGH 40N63W 1018 MB.

.FORECASTER COLLINS. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 0000 UTC THU AUG 17.
24 HOUR FORECAST VALID 0000 UTC FRI AUG 18.
48 HOUR FORECAST VALID 0000 UTC SAT AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC AND CARIBBEAN FROM 16.5N TO 20.5N BETWEEN 60W AND 71.5W
WINDS 20 TO 25 KT. SEAS TO 9 FT ATLC WATERS AND PASSAGES.
SCATTERED MODERATE TO STRONG CONVECTION FROM 15N TO 22N BETWEEN
60W AND 69W.
.ATLC AND CARIBBEAN 24 HOUR FORECAST FROM 18.5N TO 22N BETWEEN
69W AND 76.5W...INCLUDING THE WINDWARD PASSAGE...WINDS 20 TO 25
KT. SEAS TO 9 FT.
.ATLC 48 HOUR FORECAST S OF 23N BETWEEN 70W AND 77.5W E TO SE
WINDS 20 TO 25 KT. SEAS TO 8 FT.

.ATLC LOW PRES NEAR 13.5N50.5W 1011 MB. FROM 60 NM TO 360 NM N
QUADRANT WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM
13.5N TO 19N BETWEEN 45W AND 53W WINDS 20 KT OR LESS. SEAS TO 9
FT IN NE TO E SWELL. SCATTERED MODERATE TO STRONG CONVECTION
WITHIN 150 NM NW SEMICIRCLE.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
13.5N57W 1010 MB. FROM 60 NM TO 300 NM N SEMICIRCLE WINDS 20 TO
25 KT. SEAS 8 TO 11 FT. ELSEWHERE FROM 13N TO 19N BETWEEN 52W
AND 60W WINDS 20 KT OR LESS. SEAS TO 9 FT IN E SWELL.
.CARIBBEAN 48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL
CYCLONE...NEAR 14.5N64W 1010 MB. WITHIN 300 NM N SEMICIRCLE
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE ATLC AND CARIBBEAN
FROM 14.5N TO 20N BETWEEN 58W AND 66W WINDS 20 KT OR LESS. SEAS
TO 9 FT IN E SWELL.

.ATLC LOW PRES NEAR 14N38.5W 1010 MB. FROM 90 NM TO 300 NM N
QUADRANT NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE
FROM 14N TO 21N BETWEEN 35W AND 41W WINDS 20 KT OR LESS. SEAS TO
9 FT IN NE TO E SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
15N46W 1011 MB. WITHIN 270 NM N SEMICIRCLE AND 75 NM SE QUADRANT
WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE FROM 14.5N TO 20N
BETWEEN 40W AND 50W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE TO E
SWELL.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17.5N53W 1008 MB. WITHIN 270 NM NE SEMICIRCLE WINDS 20 TO 30 KT.
SEAS 9 TO 13 FT. ELSEWHERE FROM 15N TO 23N BETWEEN 47W AND 56W
WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE TO E SWELL.

.ATLC AND CARIBBEAN FROM 19N TO 21N BETWEEN 71W AND 75W...
INCLUDING WINDWARD PASSAGE...NE TO E WINDS 20 TO 25 KT.
SEAS LESS THAN 8 FT.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST CONDITIONS TO MERGE WITH ATLC AND CARIBBEAN
SECTIONS DESCRIBED ABOVE.

.ATLC 48 HOUR FORECAST FROM 13N TO 17.5N BETWEEN 35W AND 40W NE
TO E WINDS 20 TO 25 KT. SEAS TO 9 FT.

.CARIBBEAN FROM 11N TO 13N BETWEEN 70W AND 76W NE TO E WINDS 20
TO 25 KT. SEAS TO 8 FT. ELSEWHERE FROM 10.5N TO 14N BETWEEN 76W
AND 80W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE TO E SWELL.
.24 HOUR FORECAST FROM 11N TO 13N BETWEEN 78W AND 81W WINDS 20
KT OR LESS. SEAS TO 8 FT IN NE SWELL.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11N TO 13N BETWEEN 70W AND 74.5W NE WINDS
20 TO 25 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.



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