351
FZNT01 KWBC 181613
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC TUE AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 18.
24 HOUR FORECAST VALID 1200 UTC AUG 19.
48 HOUR FORECAST VALID 1200 UTC AUG 20.

.WARNINGS.

...GALE WARNING...
.LOW 41N67W 1007 MB MOVING NE 10 KT. WITHIN 120 NM E AND 180 NM
SE QUADRANTS WINDS 25 TO 35 KT. SEAS TO 3.5 M. ELSEWHERE WITHIN
360 NM S AND 300 NM E QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 45N63W 1008 MB. WITHIN 300 NM E SEMICIRCLE
AND WITHIN 240 NM E OF A FRONT FROM LOW TO 37N65W WINDS 20 TO 30
KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS MERGED WITH NEW
LOW 56N60W IN SYNOPSIS AND FORECAST.

...GALE WARNING...
.LOW 68N60W 1005 MB MOVING N 15 KT. WITHIN 60 NM OF W GREENLAND
COAST N OF 63N WINDS 25 TO 35 KT. SEAS TO 3 M. ELSEWHERE WITHIN
150 NM W OF GREENLAND N OF 61N WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW N OF AREA. CONDITIONS DIMINISHED.

.SYNOPSIS AND FORECAST.

.LOW INLAND NEAR 55N61W 1004 MB MOVING NE 20 KT. FROM 49N TO 54N
BETWEEN 53W AND 60W WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW 59N50W 1013 MB. WITHIN 300 NM E AND SE
QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 64N39W 1015 MB. CONDITIONS DIMINISHED.

.LOW 37N49W 1014 MB MOVING NE 10 KT. WITHIN 240 NM E AND SE
QUADRANTS WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 39N48W 1016 MB. WITHIN 300 NM E QUADRANT
WINDS LESS THAN 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DIMINISHED.

.LOW 41N45W 1016 MB MOVING NE 10 KT. WITHIN 240 NM NW SEMICIRCLE
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 45N45W 1017 MB. WITHIN 300 NM NE QUADRANT
WINDS TO 25 KT. SEAS LESS THAN 25 KT.
.48 HOUR FORECAST LOW 46N42W 1018 MB. CONDITIONS DINMISHED.

.48 HOUR FORECAST NEW LOW 56N60W 1002 MB. FROM 49N TO 57N
BETWEEN 49W AND 57W WINDS 20 TO 30 KT. SEAS to 2.5 m.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 41N TO 45N
BETWEEN 66W AND 70W...FROM 57N TO 61N BETWEEN 49W AND 55W...AND
W OF A LINE FROM 55N60W TO 62N55W TO 67N57W.
.24 HOUR FORECAST DENSE FOG FROM 40N TO 45N BETWEEN 63W AND
69W...WITHIN THE GULF OF SAINT LAWRENCE N OF 47N W OF 63W...AND
W OF A LINE FROM 52N56W TO 61N41W TO 67N58W.
.48 HOUR FORECAST DENSE FOG FROM 54N TO 65N BETWEEN 45W AND 65W.

.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 TUE AUG 18.
24 HOUR FORECAST VALID 1200 UTC WED AUG 19.
48 HOUR FORECAST VALID 1200 UTC THU AUG 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.CARIBBEAN 12 HOUR FORECAST WITHIN 13N72W TO 13N73W TO 12N75W TO
11N74W TO 11N73W TO 12N72W TO 13N72W NE TO E WINDS 20 TO 25 KT.
SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 13N75W TO 12N77W TO 12N78W TO 11N78W TO
11N76W TO 11N75W TO 13N75W NE TO E WINDS 20 TO 25 KT. SEAS 2.5
TO 3.0 M.
.48 HOUR FORECAST WITHIN 13N69W TO 15N73W TO 14N77W TO 11N77W TO
12N73W TO 11N70W TO 13N69W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.