High seas forecast for North Atlantic includes storm and gale warnings.

FZNT01 KWBC 191021
HSFAT1 1030

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC THU DEC 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC DEC 19.
24 HOUR FORECAST VALID 0600 UTC DEC 20.
48 HOUR FORECAST VALID 0600 UTC DEC 21.

.WARNINGS.

…STORM WARNING…
.LOW 63N38W 990 MB MOVING NE 15 KT. FRONT FROM 55N35W TO 48N40W
TO 50N42W TO 43N49W. WITHIN 240 NM E OF FRONT AND 180 NM W
SEMICIRCLE WINDS 25 TO 40 KT. SEAS 8 TO 17 FT…HIGHEST E OF
FRONT.
.06 HOUR FORECAST LOW 64N36W 988 MB. WITHIN 90 NM NW SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST LOW E OF AREA 65N28W 983 MB. CONDITIONS
DESCRIBED WITH LOW 62N39W BELOW.

…STORM WARNING…
.LOW 42N69W 1011 MB MOVING NE 35 KT. WITHIN 420 NM S QUADRANT
WINDS 25 TO 35 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 53N44W 989 MB. WITHIN 360 NM S AND 300 NM
SE QUADRANTS WINDS 35 TO 50 KT. SEAS 12 TO 20 FT. ELSEWHERE FROM
43N TO 55N BETWEEN 35W AND 52W WINDS 25 TO 40 KT. SEAS 8 TO 16
FT.
.48 HOUR FORECAST LOW WELL E OF AREA 62N16W 960 MB. CONDITIONS
DESCRIBED WITH LOW 61N40W DESCRIBED BELOW.

…STORM WARNING…
.24 HOUR FORECAST NEW LOW 61N56W 986 MB. WITHIN 180 NM AND SW
QUADRANTS WINDS 30 TO 45 KT. SEAS 8 TO 17 FT. ELSEWHERE WITHIN
360 NM SW SEMICIRCLE AND 180 NM N AND NE QUADRANTS WINDS 25 TO
35 KT. SEAS 8 TO 14 FT.
.30 HOUR FORECAST LOW 61N54W 981 MB. WITHIN 240 NM S AND 180 NM
SW QUADRANTS WINDS 40 TO 50 KT. SEAS 12 TO 21 FT.
.48 HOUR FORECAST LOW 61N40W 989 MB. FROM 55N TO 61N E OF 47W
WINDS 35 TO 50 KT. SEAS 16 TO 32 FT. ELSEWHERE FROM 53N TO 62N E
OF 50W WINDS 25 TO 40 KT. SEAS 12 TO 24 FT.

…GALE WARNING…
.LOW 62N46W 994 MB MOVING NE 15 KT. WITHIN 240 NM SW QUADRANT
WINDS 25 TO 35 KT. SEAS 9 TO 15 FT.
.24 HOUR FORECAST LOW 63N39W 990 MB. WITHIN 240 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS 9 TO 17 FT.
.48 HOUR FORECAST LOW DISSIPATED. ASSOCIATED CONDITIONS
DESCRIBED WITH LOW 61N40W DESCRIBED ABOVE.

…GALE WARNING…
.LOW S OF AREA 30N38W 1020 MB MOVING NW 10 KT. FROM 31N TO 34N E
OF 42W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.06 HOUR FORECAST LOW 32N39W 1019 MB. WITHIN 240 NM N SEMICIRCLE
WINDS 25 TO 40 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW 32N43W 1012 MB. WITHIN 300 NM NW AND 360
NM NE QUADRANTS WINDS 25 TO 40 KT. SEAS 9 TO 18 FT.
.48 HOUR FORECAST LOW 31N43W 1010 MB. FROM 31N TO 35N BETWEEN
40W AND 46W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

…GALE WARNING…
.24 HOUR FORECAST NEW LOW 33N76W 1015 MB. WITHIN 240 NM N AND NW
QUADRANTS WINDS TO 25 KT. SEAS TO 9 FT