OPC N Atlantic High Seas Forecast
Sun Mar 01 5:16 pm
FZNT01 KWBC 012214
HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SUN MAR 01 2026
CCODE/2:31:04:01:00/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
SECURITE
NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 1800 UTC MAR 01.
24 HOUR FORECAST VALID 1800 UTC MAR 02.
48 HOUR FORECAST VALID 1800 UTC MAR 03.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.18 HOUR FORECAST NEW LOW 55N47W 987 MB. WITHIN 420 NM SW AND W
QUADRANTS WINDS 25 TO 40 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW 57N45W 974 MB. WITHIN 300 NM S QUADRANT
WINDS 35 TO 50 KT. SEAS 3.5 TO 5 M. ELSEWHERE.EXCEPT WHERE
DESCRIBED BELOW...FROM 36N TO 62N E OF 67W WINDS 25 TO 40 KT.
SEAS 2.5 TO 5 M. ALSO S OF 36N BETWEEN 57W AND 75W WINDS TO 25
KT. SEAS TO 2.5 M.
.36 HOUR FORECAST LOW 60N42W 955 MB. WITHIN 120 NM S QUADRANT
WINDS 50 TO 65 KT. SEAS 7 TO 9 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 62N41W 959 MB.
WITHIN 120 NM E AND 240 NM S QUADRANTS AND FROM 62N TO 67N
BETWEEN 51W AND 58W WINDS 40 TO 50 KT. SEAS 7 TO 9 M. ELSEWHERE N
OF 42N W OF 35W WINDS 25 TO 40 KT. SEAS 2.5 TO 7 M...HIGHEST N OF
54N E OF 57W. ALSO WITHIN 600 NM W OF A FRONT FROM 40N35W TO
34N46W TO 31N59W AND FROM 40N TO 42N E OF 53W WINDS 20 TO 30 KT.
SEAS 2.5 TO 4.5 M.
...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 61N57W 985 MB MOVING NW 05 KT.
WITHIN 180 NM S QUADRANT WINDS 40 TO 50 KT. SEAS TO 3.5 M.
ELSEWHERE FROM 48N TO 66N W OF 38W...NOT INCLUDING THE WATERS E
OF GREENLAND...WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M.
.24 HOUR FORECAST COMBINED LOW 62N59W 981 MB. WITHIN 180 NM S
QUADRANT WINDS 35 TO 50 KT. SEAS TO 4 M. ELSEWHERE FROM 56N TO
63N W OF 52W WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 59N43W 978 MB. WITHIN 240 NM S SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 6 TO 7.5 M. ELSEWHERE CONDITIONS
DESCRIBED ABOVE WITH LOW 62N41W.
...GALE WARNING...
.LOW 45N54W 1004 MB MOVING NE 35 KT AND RAPIDLY INTENSIFYING.
WITHIN 420 NM SE OF FRONT FROM LOW CENTER TO 36N65W AND WITHIN
360 NM N AND 600 NM E QUADRANTS WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW 56N38W 980 MB. CONDITIONS DESCRIBED ABOVE
WITH LOW 57N45W.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW
62N41W DESCRIBED ABOVE.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY WITHIN THE GULF OF SAINT
LAWRENCE W OF 61W AND W OF A LINE FROM 55N53W TO 62N60W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY WITHIN THE GULF OF
SAINT LAWRENCE...W OF A LINE FROM 53N50W TO 60N51W TO 63N59W...N
HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SUN MAR 01 2026
CCODE/2:31:04:01:00/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).
SECURITE
NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 1800 UTC MAR 01.
24 HOUR FORECAST VALID 1800 UTC MAR 02.
48 HOUR FORECAST VALID 1800 UTC MAR 03.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.18 HOUR FORECAST NEW LOW 55N47W 987 MB. WITHIN 420 NM SW AND W
QUADRANTS WINDS 25 TO 40 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW 57N45W 974 MB. WITHIN 300 NM S QUADRANT
WINDS 35 TO 50 KT. SEAS 3.5 TO 5 M. ELSEWHERE.EXCEPT WHERE
DESCRIBED BELOW...FROM 36N TO 62N E OF 67W WINDS 25 TO 40 KT.
SEAS 2.5 TO 5 M. ALSO S OF 36N BETWEEN 57W AND 75W WINDS TO 25
KT. SEAS TO 2.5 M.
.36 HOUR FORECAST LOW 60N42W 955 MB. WITHIN 120 NM S QUADRANT
WINDS 50 TO 65 KT. SEAS 7 TO 9 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 62N41W 959 MB.
WITHIN 120 NM E AND 240 NM S QUADRANTS AND FROM 62N TO 67N
BETWEEN 51W AND 58W WINDS 40 TO 50 KT. SEAS 7 TO 9 M. ELSEWHERE N
OF 42N W OF 35W WINDS 25 TO 40 KT. SEAS 2.5 TO 7 M...HIGHEST N OF
54N E OF 57W. ALSO WITHIN 600 NM W OF A FRONT FROM 40N35W TO
34N46W TO 31N59W AND FROM 40N TO 42N E OF 53W WINDS 20 TO 30 KT.
SEAS 2.5 TO 4.5 M.
...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 61N57W 985 MB MOVING NW 05 KT.
WITHIN 180 NM S QUADRANT WINDS 40 TO 50 KT. SEAS TO 3.5 M.
ELSEWHERE FROM 48N TO 66N W OF 38W...NOT INCLUDING THE WATERS E
OF GREENLAND...WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M.
.24 HOUR FORECAST COMBINED LOW 62N59W 981 MB. WITHIN 180 NM S
QUADRANT WINDS 35 TO 50 KT. SEAS TO 4 M. ELSEWHERE FROM 56N TO
63N W OF 52W WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 59N43W 978 MB. WITHIN 240 NM S SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 6 TO 7.5 M. ELSEWHERE CONDITIONS
DESCRIBED ABOVE WITH LOW 62N41W.
...GALE WARNING...
.LOW 45N54W 1004 MB MOVING NE 35 KT AND RAPIDLY INTENSIFYING.
WITHIN 420 NM SE OF FRONT FROM LOW CENTER TO 36N65W AND WITHIN
360 NM N AND 600 NM E QUADRANTS WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW 56N38W 980 MB. CONDITIONS DESCRIBED ABOVE
WITH LOW 57N45W.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW
62N41W DESCRIBED ABOVE.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY WITHIN THE GULF OF SAINT
LAWRENCE W OF 61W AND W OF A LINE FROM 55N53W TO 62N60W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY WITHIN THE GULF OF
SAINT LAWRENCE...W OF A LINE FROM 53N50W TO 60N51W TO 63N59W...N