North Atlantic High Seas Forecast

FZNT01 KWBC 162156
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC SUN AUG 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 16. 
24 HOUR FORECAST VALID 1800 UTC AUG 17. 
48 HOUR FORECAST VALID 1800 UTC AUG 18. 

.WARNINGS. 

...GALE WARNING... 
.LOW 34N56W 1008 MB MOVING NE 20 KT. FROM 31N TO 37N BETWEEN 47W 
AND 64W WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.12 HOUR FORECAST LOW 37N50W 1005 MB. FROM 32N TO 39N BETWEEN 
46W AND 53W WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 40N47W 1010 MB. FROM 38N TO 42N BETWEEN 
44W AND 50W AND WITHIN 180 NM E OF A FRONT FROM LOW TO 31N52W 
WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M...HIGHEST NEAR 39N46W. 
ELSEWHERE BETWEEN 53W AND A LINE FROM 44N37W TO 31N47W WINDS 20 
TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 42N45W 1014 MB. 
WITHIN AN AREA BOUNDED BY A LINE FROM 31N48W TO 45N35W TO 48N35W 
TO 45N48W TO 31N48W WINDS TO 25 KT. SEAS TO 3 M.

...GALE WARNING...
.24 HOUR FORECAST LOW 40N72W 1007 MB. WITHIN 300 NM SE AND S 
QUADRANTS WINDS 20 TO 30 KT. SEAS TO 2.5 M. 
.30 HOUR FORECAST LOW 40N70W 1007 MB. FROM 37N TO 39N BETWEEN 
67W AND 70W WINDS 25 TO 35 KT. SEAS TO 3 M. 
.48 HOUR FORECAST LOW 41N67W 1008 MB. FROM 37N TO 40N BETWEEN 
64W AND 66W WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M. ELSEWHERE WITHIN 
360 NM E AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 3 M. 

...GALE WARNING... 
.24 HOUR FORECAST WITHIN 180 NM E AND SE OF A LINE FROM 65N61W 
TO 56N56W TO 47N66W AREA OF SE TO S WINDS TO 25 KT. SEAS LESS 
THAN 2.5 M. 
.42 HOUR FORECAST NEW LOW 67N60W 1004 MB. WITHIN 90 NM W OF 
GREENLAND N OF 62N AREA OF SE WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW N OF AREA. WITHIN 60 NM W OF GREENLAND N 
OF 64N WINDS 25 TO 35 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE BETWEEN 
47W AND A LINE FROM 61N52W TO 67N57W WINDS TO 25 KT. SEAS TO 2.5 
M.

.SYNOPSIS AND FORECAST. 

.COMPLEX LOW WITH MAIN CENTER 55N35W 998 MB MOVING NE 15 KT. 
WITHIN 360 NM S AND SE QUADRANTS AND WITHIN 180 NM E AND SE OF A 
FRONT EXTENDING FROM 46N35W TO 37N48W WINDS 20 TO 30 KT. SEAS TO 
3 M...HIGHEST NEAR 40N41W.
.24 HOUR FORECAST LOW E OF AREA 60N25W 993 MB. BETWEEN 64N AND A 
LINE FROM 54N35W TO 58N44W WINDS 20 TO 30 KT. SEAS TO 2.5 M. 
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS MOVED E OF AREA. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 51N TO 55N 
BETWEEN 35W AND 45W. 
.24 HOUR FORECAST DENSE FOG N OF 64N W OF 60W. 
.48 HOUR FORECAST DENSE FOG FROM 57N TO 65N BETWEEN 49W AND 
56W...FROM 55N TO 60N W OF 58W...AND N OF 42N BETWEEN 67W AND 
70W.

.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 SUN AUG 16.
24 HOUR FORECAST VALID 1800 UTC MON AUG 17.
48 HOUR FORECAST VALID 1800 UTC TUE AUG 18.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 31N58W TO 31N61W TO 30N62W TO 29N62W TO 29N61W TO
31N58W W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 31N49W TO 31N53W TO 29N54W TO 29N51W TO
31N49W SW WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 2.5 M.

.ATLC AND CARIBBEAN WITHIN 21N71W TO 21N74W TO 20N74W TO 20N73W
TO 20N71W TO 21N71W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN
2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.CARIBBEAN WITHIN 17N68W TO 18N76W TO 14N81W TO 11N80W TO 11N69W
TO 17N68W NE TO E WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 15N71W TO 17N74W TO 17N80W TO 14N81W TO
11N79W TO 11N74W TO 15N71W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 
M.
.48 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.