347
FZNT01 KWBC 172217
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC MON AUG 17 2026

CCODE/1:31:04:01:00/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP
(ALL LOWERCASE).

FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).

SECURITE

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

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1800 UTC AUG 17.
24 HOUR FORECAST VALID 1800 UTC AUG 18.
48 HOUR FORECAST VALID 1800 UTC AUG 19.

.WARNINGS.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 41N46W 1013 MB DRIFTING NE AND A
SECOND CENTER 35N50W 1012 MB MOVING NE 05 KT. WITHIN 150 NM N
AND NE QUADRANTS OF MAIN CENTER AND WITHIN 180 NM SE SEMICIRCLE
OF SECOND CENTER WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M...HIGHEST
NEAR 40N46W. ELSEWHERE FROM 31N TO 43N BETWEEN 45W AND 53W AND
WITHIN 240 NM NE AND 360 NM E AND SE QUADRANTS OF MAIN CENTER
WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 43N43W 1016 MB
AND SECOND CENTER 37N49W 1014 MB. WITHIN 240 NM NW AND E
SEMICIRCLES OF MAIN CENTER...WITHIN 240 NM NW AND W QUADRANTS OF
SECOND CENTER...AND FROM 31N TO 39N BETWEEN 46W AND 49W WINDS TO
25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 46N37W 1017 MB. FROM 44N TO 49N E OF 41W
WINDS TO 25 KT. SEAS TO 2.5 M.

...GALE WARNING...
.LOW 40N73W 1008 MB MOVING NE 10 KT. WITHIN 360 NM SE QUADRANT
WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.12 HOUR FORECAST LOW 41N70W 1007 MB. FROM 37N TO 40N BETWEEN
65W AND 68W WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 42N67W 1007 MB. FROM 37N TO 41N BETWEEN
63W AND 66W WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M. ELSEWHERE FROM
35N TO 43N BETWEEN 62W AND 67W WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 47N63W 1008 MB. WITHIN 300 NM E SEMICIRCLE
AND WITHIN 240 NM E OF A FRONT FROM LOW TO 42N62W TO 36N65W
WINDS 20 TO 30 KT. SEAS TO 3 M...HIGHEST NEAR 43N60W.

...GALE WARNING...
.LOW INLAND NEAR 65N70W 1003 MB MOVING NE 10 KT. FROM 62N TO 65N
BETWEEN 56W AND 61W AREA OF SE WINDS TO 25 KT. SEAS LESS THAN
2.5 M.
.12 HOUR FORECAST LOW 66N61W 1006 MB. WITHIN 90 NM W OF
GREENLAND N OF 64N WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW N OF AREA. N OF 61N BETWEEN 49W AND 54W
WINDS 20 TO 30 KT. SEAS TO 3 M.
.36 HOUR FORECAST LOW N OF AREA. CONDITIONS DIMINISHED.

.SYNOPSIS AND FORECAST.

.LOW E OF AREA NEAR 60N27W 995 MB MOVING SE 15 KT. BETWEEN 35W
AND A LINE FROM 60N46W TO 55N35W AND FROM 60N TO 64N BETWEEN 39W
AND 42W WINDS 20 TO 30 KT. SEAS TO 3 M...HIGHEST NEAR 35W.
.24 HOUR FORECAST LOW WELL E OF AREA. FROM 57N TO 63N E OF 38W
WINDS LESS THAN 25 KT. SEAS TO 2.5 M.
.36 HOUR FORECAST CONDITIONS MOVED E OF AREA.

.INLAND LOW 49N69W 1007 MB MOVING NE 25 KT. FROM 46N TO 54N W OF
54W INCLUDING WITHIN THE GULF OF SAINT LAWRENCE WINDS 20 TO 30
KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW 58N60W 1008 MB. FROM 50N TO 57N BETWEEN
48W AND 56W WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 62N41W 1013 MB. FROM 54N TO 62N BETWEEN
37W AND 45W WINDS LESS THAN 25 KT. SEAS TO 2.5 M.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM N
OF 43N BETWEEN 65W AND 69W...FROM 55N TO 62N W OF 58W...FROM 61N
TO 65N BETWEEN 53W AND 56W...AND W OF A LINE FROM 63N64W TO
65N62W.
.48 HOUR FORECAST DENSE FOG N OF 41N BETWEEN 64W AND 69W...FROM
49N TO 52N BETWEEN 49W AND 52W...FROM 57N TO 65N BETWEEN 42W AND
55W...AND W OF A LINE FROM 53N51W TO 57N52W TO 64N61W TO 66N60W.

.FORECASTER BANCROFT. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 1800 UTC MON AUG 17.
24 HOUR FORECAST VALID 1800 UTC TUE AUG 18.
48 HOUR FORECAST VALID 1800 UTC WED AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 31N49W TO 31N55W TO 30N55W TO 29N54W TO 29N52W TO
31N49W SW WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.CARIBBEAN WITHIN 17N71W TO 18N73W TO 16N81W TO 11N79W TO 10N76W
TO 14N70W TO 17N71W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 14N72W TO 14N73W TO 13N74W TO 12N74W TO
11N73W TO 13N72W TO 14N72W NE TO E WINDS 20 TO 25 KT. SEAS LESS
THAN 2.5 M.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.