North Atlantic High Seas Forecast

FZNT01 KWBC 190943 CCA
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC FRI SEP 19 2025

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 0600 UTC SEP 19. 
24 HOUR FORECAST VALID 0600 UTC SEP 20.
48 HOUR FORECAST VALID 0600 UTC SEP 21.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH ONE CENTER 62N63W 981 MB MOVING S 15 KT WILL
TURN SE AFTER 24 HOURS...A SECOND CENTER 56N50W 998 MB MOVING NW
15 KT...AND A THIRD CENTER 51N57W 1000 MB MOVING NE 20 KT. WITHIN
180 NM N AND NW QUADRANTS OF FIRST CENTER...AND WITHIN 360 NM N
AND NE QUADRANTS OF SECOND CENTER WINDS 40 TO 55 KT. SEAS 5 TO 8
M. ALSO WITHIN 360 NM NE...150 NM SE...AND 420 NM N AND NW 
QUADRANTS OF FIRST CENTER...WITHIN 480 NM N AND NE...AND 420 NM 
S AND SE QUADRANTS OF SECOND CENTER WINDS 25 TO 40 KT. SEAS 3.5 
TO 6 M. ELSEWHERE N OF 48N W OF 41W...EXCEPT FROM 51N TO 57N W 
OF 50W...WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 58N49W 996 MB.
WITHIN 180 NM N AND NE QUADRANTS WINDS 35 TO 50 KT. SEAS 5 TO 7.5
M. ALSO WITHIN 420 NM E AND NE...600 NM S AND SE...AND 300 NM N
AND NW QUADRANTS...AND N OF 63N W OF 60W WINDS 25 TO 40 KT. SEAS
3 TO 5.5 M. ELSEWHERE FROM 48N TO 62N E OF 53W...AND N OF 62N W
OF GREENLAND WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST COMBINED LOW 59N57W 987 MB. WITHIN 120 NM E
SEMICIRCLE...AND WITHIN 240 NM SW AND 420 NM NW QUADRANTS WINDS
30 TO 45 KT. SEAS 4 TO 6.5 M. ELSEWHERE N OF 43N BETWEEN 46W AND
64W...INCLUDING THE GULF OF SAINT LAWRENCE...WINDS 20 TO 30 KT.
SEAS 3 TO 5 M.

...STORM WARNING...
.LOW 44N61W 1006 MB MOVING NE 15 KT AND INTENSIFYING. FROM 34N TO
45N BETWEEN 46W AND 67W WINDS 20 TO 30 KT. SEAS TO 3 M.
.12 HOUR FORECAST LOW 44N53W 1005 MB. WITHIN 420 NM S AND SE
QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 45N46W 1005 MB. WITHIN 300 NM NE...AND 420
NM S AND SE QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M.
ELSEWHERE FROM 36N TO 51W BETWEEN 36W AND 66W...INCLUDING THE
GULF OF SAINT LAWRENCE...WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW 57N41W 994 MB. WITHIN 180 NM E AND SE
QUADRANTS WINDS 35 TO 50 KT. SEAS 5 TO 6.5 M. ALSO WITHIN 420 NM
N AND NE...960 NM S AND SE...AND 150 NM SW QUADRANTS WINDS 25 TO
35 KT. SEAS 3 TO 5 M. ELSEWHERE FROM 38N TO 65N E OF 46W WINDS 20
TO 30 KT. SEAS 2.5 TO 4 M.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 55N TO 65N
BETWEEN 45W AND 66W...AND FROM 43N TO 46N BETWEEN 64W AND 68W.
.24 HOUR FORECAST DENSE FOG N OF 62N W OF 57W...AND 43N TO 64N
BETWEEN 37W AND 51W. 
.48 HOUR FORECAST DENSE FOG FROM 56N TO 62N W OF 54W...AND N OF
54N BETWEEN 38W AND 49W.

.FORECASTER MILLS. 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 FRI SEP 19.
24 HOUR FORECAST VALID 0600 UTC SAT SEP 20.
48 HOUR FORECAST VALID 0600 UTC SUN SEP 21.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GABRIELLE NEAR 21.8N 54.7W 1004 MB AT 0900 UTC
SEP 19 MOVING WNW OR 300 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS
45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 130 NM NE
QUADRANT...100 NM SE QUADRANT...0 NM SW QUADRANT...AND 70 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 315 NM NE QUADRANT...150
NM SE QUADRANT...90 NM SW QUADRANT...AND 180 NM NW QUADRANT WITH
SEAS TO 5.5 M. ELSEWHERE WITHIN 25N51W TO 25N55W TO 23N56W TO 
21N55W TO 20N51W TO 22N49W TO 25N51W WINDS 20 TO 33 KT. SEAS 4.0
TO 5.5 M. REMAINDER OF AREA WITHIN 26N47W TO 29N53W TO 25N58W TO
19N56W TO 19N48W TO 23N46W TO 26N47W WINDS 20 KT OR LESS. SEAS 
2.5 TO 4.5 M IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM GABRIELLE NEAR 23.9N 57.7W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 120 NM NE QUADRANT...90 NM SE QUADRANT...0 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 
NM N SEMICIRCLE AND 105 NM S SEMICIRCLE WITH SEAS TO 6.0 M. 
ELSEWHERE WITHIN 25N55W TO 27N56W TO 26N59W TO 25N60W TO 23N58W 
TO 22N57W TO 25N55W WINDS 20 TO 33 KT. SEAS 4.0 TO 6.0 M. 
REMAINDER OF AREA WITHIN 31N54W TO 27N57W TO 31N58W TO 28N63W TO 
20N60W TO 24N51W TO 31N54W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M
IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM GABRIELLE NEAR 27.1N 60.3W. 
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE 
WINDS WITHIN 140 NM NE QUADRANT...110 NM SE QUADRANT...40 NM SW 
QUADRANT...AND 80 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 180 
NM N SEMICIRCLE AND 120 NM S SEMICIRCLE WITH SEAS TO 6.0 M. 
ELSEWHERE WITHIN 27N57W TO 29N59W TO 29N62W TO 27N63W TO 25N61W 
TO 26N58W TO 27N57W WINDS 20 TO 33 KT. SEAS 4.0 TO 6.0 M. 
REMAINDER OF AREA WITHIN 31N58W TO 29N62W TO 31N64W TO 28N66W TO 
24N65W TO 25N57W TO 31N58W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M
IN MIXED SWELL.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

.SYNOPSIS AND FORECAST.

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


.FORECASTER ERA. NATIONAL HURRICANE CENTER.

$$