High seas forecast: hurricane winds and significant wave heights expected.

FZNT01 KWBC 202131
HSFAT1 2230

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC FRI DEC 20 2024

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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
[email protected](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 DEC 20.
24 HOUR FORECAST VALID 1800 UTC DEC 21.
48 HOUR FORECAST VALID 1800 UTC DEC 22.

.WARNINGS.

…HURRICANE FORCE WIND WARNING…
.LOW 37N72W 1002 MB MOVING NE 30 KT. FROM 31N TO 42N BETWEEN 60W
AND 75W WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.12 HOUR FORECAST LOW 42N65W 992 MB. FROM 38N TO 44N BETWEEN 58W
AND 67W WINDS 40 TO 50 KT. SEAS 10 TO 16 FT.
.24 HOUR FORECAST LOW 46N59W 979 MB. WITHIN 300 NM E…420 NM
S…AND 240 NM NW AND N QUADRANTS WINDS 45 TO 60 KT. SEAS 13 TO
23 FT. ELSEWHERE BETWEEN 76W AND A LINE FROM 31N56W TO 50N39W TO
54N44W WINDS 30 TO 45 KT. SEAS 9 TO 18 FT.
.42 HOUR FORECAST LOW 53N55W 967 MB. WITHIN 240 NM SE AND NW
QUADRANTS WINDS 50 TO 65 KT. SEAS 16 TO 30 FT.
.48 HOUR FORECAST LOW 56N51W 970 MB. WITHIN 300 NM SE
QUADRANT…WITHIN 240 NM W SEMICIRCLE…AND FROM 58N TO 60N
BETWEEN 42W AND 48W WINDS 50 TO 70 KT. SEAS 20 TO 36 FT.
ELSEWHERE FROM 49N TO 60N BETWEEN 35W AND 57W WINDS 40 TO 50 KT.
SEAS 12 TO 30 FT…HIGHEST S OF LOW. ALSO FROM 45N TO 63N
BETWEEN 35W AND 66W…N OF 63N W OF GREENLAND…AND FROM 40N T0 TO 30 KT. SEAS 8 TO 12 FT.

…GALE WARNING…
.24 HOUR FORECAST N OF 61N W OF 51W AREA OF SW WINDS 25 TO 35
KT. SEAS TO 11 FT.
.48 HOUR FORECAST CONDITIONS DESCRIBED ABOVE WITH LOW 56N51W.

…GALE WARNING…
.48 HOUR FORECAST NEW LOW 39N55W 1008 MB. FROM 31N TO 42N
BETWEEN 46W AND 71W WINDS 25 TO 40 KT. SEAS 8 TO 12 FT.

…HEAVY FREEZING SPRAY WARNING…
.MODERATE TO HEAVY FREEZING SPRAY N OF 53N W OF 53W. ELSEWHERE
LIGHT TO MODERATE FREEZING SPRAY NW AND N OF A LINE FROM 46N63W
TO 54N45W TO 60N45W TO 65N35W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY NW AND N OF A
LINE FROM 59N63W TO 65N64W TO 63N50W. ELSEWHERE LIGHT TO
MODERATE FREEZING SPRAY NW AND N OF A LINE FROM 46N64W TO
64N35W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY NW AND N OF
LINE FROM 55NFORECAST.

.ATLC WITHIN 27N69W TO 27N70W TO 26N71W TO 25N69W TO 26N70W TO
27N69W E TO SE WINDS 20 TO 25 KT. SEAS 8 TO 10 FT IN E SWELL.
ELSEWHERE WITHIN 21N44W TO 28N71W TO 21N71W TO 18N63W TO 08N54W
TO 15N52W TO 21N44W…INCLUDING IN ATLANTIC EXPOSURES AND
PASSAGES…WIN