331
FZNT01 KWBC 171619
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 17.
24 HOUR FORECAST VALID 1200 UTC AUG 18.
48 HOUR FORECAST VALID 1200 UTC AUG 19.

.WARNINGS.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 40N47W 1008 MB DRIFTING NE AND A
SECOND CENTER 34N53W 1010 MB MOVING NE 10 KT. WITHIN 180 NM NE
AND E SEMICIRCLES AND 120 NM W QUADRNT OF MAIN CENTER AND WITHIN
180 NM E AND SE QUADRANTS OF SECOND CENTER WINDS 25 TO 35 KT.
SEAS TO 4.5 M...HIGHEST NEAR 38N48W. ELSEWHERE FROM 31N TO 43N
BETWEEN 47W AND 54W AND WITHIN 360 NM E AND SE QUADRANTS OF MAIN
CENTER WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 41N47W 1015 MB.
WITHIN AN AREA BOUNDED BY A LINE FROM 31N48W TO 40N44W TO 46N37W
TO 44N50W TO 31N48W WINDS TO 25 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 46N40W 1017 MB. WITHIN 300 NM NW
SEMICIRCLE AND 420 NM S QUADRANT WINS LESS THAN 25 KT. SEAS TO
2.5 M.

...GALE WARNING...
.LOW 40N74W 1009 MB MOVING NE 10 KT. WITHIN 420 NM E AND SE
QUADRANTS WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.12 HOUR FORECAST LOW 41N70W 1007 MB. FROM 37N TO 40N BETWEEN
66W AND 69W WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 41N68W 1007 MB. FROM 36N TO 40N BETWEEN
65W AND 68W WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M. ELSEWHERE WITHIN
300 NM E AND 420 NM S QUADRANTS WINDS TO 25 KT SEAS TO 3 M.
.48 HOUR FORECAST LOW 44N64W 1009 MB. WITHIN 300 NM E SEMICIRCLE
AND WITHIN 240 NM E OF A FRONT FROM LOW TO 42N63W TO 36N66W
WINDS 20 TO 30 KT. SEAS TO 3.5 M...HIGHEST NEAR 42N62W.

...GALE WARNING...
.12 HOUR FORECAST NEW LOW 65N62W 1006 MB. WITHIN 180 NM NE AND E
OF A LINE FROM LOW TO 61N57W WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 68N61W 1006 MB. WITHIN 90 NM W OF
GREENLAND N OF 63N WINDS 25 TO 40 KT. SEAS 2.5 TO 3.5 M.
ELSEWHERE N OF 61N BETWEEN 49W AND 56W WINDS 20 TO 30 KT. SEAS
TO 2.5 M.
.48 HOUR FORECAST LOW N OF AREA. CONDITIONS DIMINISHED.

.SYNOPSIS AND FORECAST.

.LOW E OF AREA NEAR 59N28W 993 MB MOVING E 15 KT. BETWEEN 35W
AND A LINE FROM 59N45W TO 54N35W AND FROM 59N TO 64N BETWEEN 39W
AND 44W WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW WELL E OF AREA. FROM 57N TO 63N E OF 40W
WINDS LESS THAN 25 KT. SEAS TO 2.5 M.
.36 HOUR FORECAST CONDITIONS MOVED E OF AREA.

.24 HOUR FORECAST LOW 56N60W 1007 MB. FROM 50N TO 56N BETWEEN
48W AND 57W WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 61N43W 1014 MB. WITHIN 180 NM E OF A FRONT
FROM LOW TO 54N49W WINDS TO 25 KT. SEAS TO 2.5 M.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM N
OF 43N W OF 66W...FROM 57N TO 61N W OF 58W...AND N OF 61N
BETWEEN 53W AND 57W.
.48 HOUR FORECAST DENSE FOG FROM 41N TO 45N BETWEEN 65W AND
68W...FROM 57N TO 66N BETWEEN 43W AND 56W...W OF A LINE FROM
55N57W TO 62N62W TO 67N57W...AND FROM 45N TO 48N BETWEEN 44W AND
48W.

.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 1200 UTC MON AUG 17.
24 HOUR FORECAST VALID 1200 UTC TUE AUG 18.
48 HOUR FORECAST VALID 1200 UTC WED AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 31N50W TO 31N55W TO 29N55W TO 28N54W TO 29N52W TO
29N51W TO 31N50W 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 18N70W TO 17N80W TO 13N80W TO 11N77W TO 12N70W
TO 13N69W TO 18N70W 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.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.