North Atlantic High Seas Forecast

FZNT01 KWBC 170952
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC SAT OCT 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

FROM OCTOBER 15 TO APRIL 1, DUE TO THE CLIMATOLOGY OF THE NORTH
ATLANTIC AND THE FREQUENCY AND VOLUME OF WEATHER HAZARDS, ALONG
WITH CUSTOMER FEEDBACK, HIGH SEAS FORECASTS WILL BE LIMITED TO
WINDS OF 25 TO 35 KNOTS AND HIGHER, AND SEAS OF 4 METERS OR
GREATER, ALONG WITH FREEZING SPRAY, DENSE FOG, VOLCANIC ASH, AND
ANYTHING TROPICAL (INCLUDING A DEPRESSION). LESSER CONDITIONS
WILL BE INCLUDED FOR WARNING CONDITIONS AND TO PRESERVE
CONTINUITY WHERE APPROPRIATE.

SECURITE

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

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 0600 UTC OCT 17.
24 HOUR FORECAST VALID 0600 UTC OCT 18.
48 HOUR FORECAST VALID 0600 UTC OCT 19.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 60N43W 971 MB MOVING N 15 KT.
WITHIN 480 NM S AND 240 NM SW QUADRANTS WINDS 35 TO 50 KT. SEAS
4.5 TO 8.5 M. ELSEWHERE E OF A LINE FROM 67N65W TO 63N64W TO
42N42W WINDS 25 TO 40 KT. SEAS 2.5 TO 7 M...HIGHEST FROM 45N TO
59N E OF 54W. ALSO...EXCEPT WHERE DESCRIBED BELOW...S OF 50N E OF
57W WINDS LESS THAN 25 KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST COMBINED LOW 65N38W 972 MB. E OF A LINE FROM
65N35W TO 61N42W WINDS 35 TO 50 KT. SEAS 6 TO 11 M. ELSEWHERE N
OF 60N E OF GREENLAND WINDS 25 TO 35 KT. SEAS 3.5 TO 7 M.
.48 HOUR FORECAST LOW AND CONDITIONS MOVED WELL NE OF AREA.

...STORM WARNING...
.LOW NEAR 48N64W 991 MB MOVING NE 35 KT AND INTENSIFYING. FROM
35N TO 50N W OF 53W WINDS 25 TO 35 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 56N44W 984 MB AND
SECOND NEW CENTER 60N38W 980 MB. WITHIN 360 NM E AND 240 NM S
QUADRANTS OF FIRST CENTER WINDS 35 TO 50 KT. SEAS 4.5 TO 7.5 M.
ELSEWHERE FROM 48N TO 60N E OF 47W WINDS 25 TO 35 KT. SEAS 3 TO
6.5 M. ALSO...EXCEPT WHERE DESCRIBED BELOW...N OF 38N W OF 35W
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M.
.48 HOUR FORECAST COMBINED LOW MOVED WELL NE OF AREA WITH NEW LOW
TO FORM NEAR 65N37W 972 MB. FROM 58N TO 60N E OF 46W WINDS 35 TO
50 KT. SEAS 4.5 TO 8 M. ELSEWHERE FROM 50N TO 65N W OF 35W AND
FROM 41N TO 50N E OF 57W WINDS 25 TO 40 KT. SEAS 2.5 TO 6 M.

...STORM WARNING...
.LOW 36N76W 1010 MB MOVING SE 10 KT. CONDITIONS DESCRIBED ABOVE
WITH LOW 48N64W.
.12 HOUR FORECAST LOW 35N73W 1010 MB. WITHIN 300 NM NW SEMICIRCLE
WINDS 25 TO 40 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 34N72W 1009 MB. WITHIN 240 NM NW SEMICIRCLE
WINDS 35 TO 50 KT. SEAS 4 TO 6.5 M. ELSEWHERE W OF A FRONT FROM
42N55W TO 37N64W TO 35N71W TO 31N74W WINDS 25 TO 35 KT. SEAS 2.5
TO 5 M.
.48 HOUR FORECAST LOW 33N72W 1006 MB. WITHIN 480 NM N AND 360 NM
W QUADRANTS WINDS 30 TO 45 KT. SEAS 4 TO 7.5 M. ELSEWHERE WITHIN
360 NM N OF FRONT FROM 40N46W TO 38N51W TO 37N67W AND S OF 42N W
OF 64W WINDS 25 TO 35 KT. SEAS 3 TO 6 M.

...GALE WARNING...
.18 HOUR FORECAST N OF 60N BETWEEN GREENLAND AND 61W WINDS 25 TO
35 KT. SEAS 3 TO 5.5 M.
.24 HOUR FORECAST N OF 59N W OF 46W WINDS 20 TO 30 KT. SEAS 2.5
TO 4.5 M. 
.48 HOUR FORECAST CONDITIONS DESCRIBED ABOVE WITH LOW 65N37W.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 90 NM OF E
GREENLAND COAST...FROM 58N TO 64N BETWEEN 47W AND 53W...WITHIN
THE GULF OF SAINT LAWRENCE N OF 50N...AND FROM 41N TO 45N BETWEEN
62W AND 68W.
.24 HOUR FORECAST DENSE FOG WITHIN 90 NM NW AND N OF A LINE FROM
55N45W TO 60N38W TO 60N35W...N OF 64N BETWEEN 35W AND 40W...AND
FROM 54N TO 60N W OF 49W.
.48 HOUR FORECAST DENSE FOG N OF 63N E OF 38W.

.24 HOUR FORECAST LIGHT FREEZING SPRAY N OF 64N W OF 60W. 
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 58N W OF 59W.

.FORECASTER JOSEPH. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 0600 UTC SAT OCT 17.
24 HOUR FORECAST VALID 0600 UTC SUN OCT 18.
48 HOUR FORECAST VALID 0600 UTC MON OCT 19.

.WARNINGS.

...ATLC GALE WARNING...
.ATLC 12 HOUR FORECAST COLD FRONT FROM 31N78W TO 28N80W. W OF
FRONT WITHIN 31N79W TO 31N81W TO 31N82W TO 28N81W TO 29N80W TO 
31N79W NW TO N WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST COLD FRONT FROM 31N74W TO 26N80W. W OF FRONT
WITHIN
31N74W TO 31N81W TO 26N80W TO 31N74W N TO NE WINDS 20 TO 30 KT 
WITH FREQUENT GUSTS TO GALE FORCE. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST COLD FRONT FROM 31N71W TO 24N81W. W OF FRONT 
WITHIN 31N71W TO 31N81W TO 27N80W TO 24N80W TO 29N76W TO 31N71W N
TO NE WINDS 20 TO 30 KT. SEAS 4.0 TO 5.5 M IN N TO NE SWELL. 
ELSEWHERE WITHIN 31N65W TO 31N70W TO 28N77W TO 27N78W TO 24N76W 
TO 26N70W TO 31N65W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW 
TO N SWELL.

...GULF OF AMERICA GALE WARNING...
.GULF OF AMERICA COLD FRONT FROM 30N85W TO 24N95W TO 18N95W. W OF
FRONT WITHIN 25N96W TO 25N97W TO 23N98W TO 21N97W TO 22N96W TO 
25N96W NW TO N WINDS 25 TO 40 KT. SEAS 4.0 TO 5.5 M. ELSEWHERE W
OF FRONT WITHIN 30N85W TO 30N94W TO 28N97W TO 20N97W TO 19N95W 
TO 25N93W TO 30N85W N TO NE WINDS 20 TO 30 KT WITH FREQUENT GUSTS
TO GALE FORCE. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST COLD FRONT FROM 25N81W TO 21N90W. W OF FRONT
WITHIN 21N96W TO 20N97W TO 19N96W TO 18N94W TO 19N94W TO 21N96W 
NW 
WINDS 30 TO 45 KT. SEAS 5.5 TO 7.0 M IN NW TO N SWELL. ELSEWHERE
NW OF FRONT WITHIN 30N84W TO 30N89W TO 27N96W TO 21N97W TO 
19N92W TO 25N82W TO 30N84W NE WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5
M.
.48 HOUR FORECAST FRONT SE OF AREA. LITTLE CHANGE IN WINDS AND 
SEAS.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 31N50.5W TO 31N53.5W TO 30.5N52.5W TO 30.5N51.5W TO
30.5N50.5W TO 31N50.5W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
NW TO N SWELL.
.24 HOUR FORECAST WITHIN 31N39W TO 31N49W TO 29N45W TO 29N43W TO
31N39W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL.
.48 HOUR FORECAST LITTLE CHANGE.

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


.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.

$$