####018007852####
FZNT01 KWBC 212152

HSFAT1



HIGH SEAS FORECAST FOR METAREA IV 

NWS OCEAN PREDICTION CENTER WASHINGTON DC 

2230 UTC SUN APR 21 2024 



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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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). 



SECURITE 



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



ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS 



SYNOPSIS VALID 1800 UTC APR 21. 

24 HOUR FORECAST VALID 1800 UTC APR 22. 

48 HOUR FORECAST VALID 1800 UTC APR 23. 



.WARNINGS. 

...STORM WARNING... 

.48 HOUR FORECAST LOW 35N68W 992 MB. WITHIN 240 NM S SEMICIRCLE 

WINDS 35 TO 50 KT. SEAS 9 TO 15 FT. ELSEWHERE WITHIN 300 NM E 

SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 11 FT. 



...GALE WARNING... 

.COMPLEX LOW WITH MAIN CENTER 65N62W 993 MB MOVING NE 20 KT. 

WITHIN 90 NM W OF THE GREENLAND COAST WINDS 35 TO 45 KT. SEAS 12 

TO 21 FT. ELSEWHERE N OF 50N BETWEEN 56W AND 45W WINDS 25 TO 35 

KT. SEAS 8 TO 15 FT. 

.24 HOUR FORECAST LOW N OF AREA. N OF 57N BETWEEN 45W AND 56W 

WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. 

.48 HOUR FORECAST CONDITIONS DIMINISHED 



...GALE WARNING... 

.LOW INLAND NEAR 45N54W 1002 MB MOVING FROM 45N TO 50N W OF 47W 

WINDS 25 TO 35 KT. SEAS TO 10 FT. 

.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DIMINISHED. 



...GALE WARNING... 

.LOW 51N36W 1003 MB MOVING NW 10 KT. WITHIN 240 NM NW AND 180 NM 

SW QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 12 FT. 

.24 HOUR FORECAST LOW 55N41W 1009 MB. WITHIN 120 NM OF CENTER 

WINDS TO 25 KT. SEAS TO 9 FT. 

.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DIMINISHED. 



...GALE WARNING... 

.LOW 31N35W 1007 MB MOVING E 10 KT. WITHIN 120 NM OF LOW WINDS 

TO 25 KT. SEAS TO 9 FT. 

.24 HOUR FORECAST LOW E OF AREA 31N32W 1002 MB. WITHIN 300 NM NW 

QUADRANT WINDS 25 TO 35 KT. SEAS TO 10 FT. 

.48 HOUR FORECAST LOW JUST SE NEAR 29N33W 1006 MB. WITHIN 360 NM 

NW QUADRANT WINDS 25 TO 35 KT. SEAS 9 TO 16 FT. 



...GALE WARNING... 

.LOW 34N74W 1008 MB MOVING NE 15 KT. WITHIN 120 NM SE AND S 

QUADRANTS WINDS TO 25 KT. SEAS TO 9 FT. 

.24 HOUR FORECAST LOW 36N64W 1009 MB. FROM 31N TO 37N W OF 60W 

AND WITHIN 300 E AND SE OF A LINE FROM 37N67W TO 45N45W WINDS 25 

TO 35 KT. SEAS 8 TO 13 FT. 

.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DESCRIBED WITH 

LOW 59N58W BELOW.



...GALE WARNING... 

.30 HOUR FORECAST LOW INLAND 55N61W 989 MB. WITHIN 420 NM SE AND 

120 NE QUADRANTS AND WITHIN 150 NM S AND SW OF THE GREENLAND 

COAST S OF 61N WINDS 25 TO 40 KT. SEAS 9 TO 16 FT. 

.48 HOUR FORECAST LOW 61N57W 986 MB. FROM 51N TO 57N BETWEEN 34W 

AND 56W WINDS 25 TO 40 KT. SEAS 8 TO 16 FT. ELSEWHERE FROM 48N 

TO 61N E OF 61W AND N OF 57N E OF THE GREENLAND COAST WINDS 20 

TO 30 KT. SEAS TO 10 FT.



.SYNOPSIS AND FORECAST.



.LOW 45N54W 1008 MB MOVING NE 15 KT. WITHIN 180 NM NE AND 300 NM 

S AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 10 FT.

.24 HOUR FORECAST LOW 51N46W 1007 MB. WITHIN 420 NM SE QUADRANT 

WINDS 20 TO 30 KT. SEAS TO 11 FT.

.48 HOUR FORECAST LOW DISSIPATED CONDITIONS DIMINISHED.



.LOW 44N34W 1006 MB MOVING NE 15 KT. WITHIN 360 NM W AND NW AND 

300 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. 

.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA. 



.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 50N BETWEEN 

49W AND 55W. 

.24 HOUR FORECAST DENSE FOG N OF 42N BETWEEN 48W AND 58W AND 

FROM 54N TO 60N E OF 42W. 

.48 HOUR FORECAST DENSE FOG N OF 55N W OF 48W AND N OF 57N E OF 

44W. 



.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY W OF A LINE 

FROM 57N58W TO 57N52W TO 53N49W TO 50N52W. 



.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.



NATIONAL HURRICANE CENTER MIAMI FL



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

GULF OF MEXICO



SYNOPSIS VALID 1800 UTC SUN APR 21.

24 HOUR FORECAST VALID 1800 UTC MON APR 22.

48 HOUR FORECAST VALID 1800 UTC TUE APR 23.



.WARNINGS.



...GULF OF MEXICO GALE WARNING...

.GULF OF MEXICO COLD FRONT FROM 30N85W TO 25N97.5W. WITHIN 

26N93W TO 28N93W TO 28N97W TO 22N98W TO 19N95W TO 23N95W TO 

26N93W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.

.06 HOUR FORECAST COLD FRONT FROM 29N82.5W TO 24N98W. WITHIN 

23.5N97W TO 23.5N97.5W TO 23N98W TO 22.5N98W TO 22.5N97W TO 

23.5N97W N WINDS 30 TO 35 KT. SEAS 9 TO 10 FT. ELSEWHERE WITHIN 

29N91W TO 30N93W TO 26N97W TO 22N98W TO 21N97W TO 24N93W TO 

29N91W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.

.12 HOUR FORECAST COLD FRONT FROM 27N82W TO 21N97W. WITHIN 

29N91W TO 30N93W TO 27N97W TO 22N98W TO 19N96W TO 23N93W TO 

29N91W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.

.24 HOUR FORECAST COLD FRONT FROM 25N81W TO 19N96W. WITHIN 

20N95W TO 21N96W TO 20N97W TO 19N96W TO 19N95W TO 20N95W NW TO N 

WINDS 20 TO 30 KT. SEAS 8 TO 9 FT. ELSEWHERE WITHIN 27N89W TO 

26N95W TO 23N98W TO 19N95W TO 22N94W TO 24N91W TO 27N89W WINDS 20

KT OR LESS. SEAS 8 FT IN N TO NE SWELL.

.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 

LESS THAN 8 FT.



...ATLANTIC GALE WARNING...

.ATLC 12 HOUR FORECAST COLD FRONT FROM 31N77W TO 28N81W. WITHIN 

31N72W TO 31N75W TO 30.5N75W TO 30N74W TO 30N72.5W TO 31N72W SW 

WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.24 HOUR FORECAST COLD FRONT FROM 31N74W TO 27N80W. WITHIN 

31N70W TO 31N81W TO 28N81W TO 29N72W TO 31N70W W TO NW WINDS 20 

TO 30 KT. SEAS 8 FT.

.27 HOUR FORECAST COLD FRONT FROM 31N73W TO 26N80W. WITHIN 

31N72.5W TO 31N77W TO 30.5N77W TO 30.5N74.5W TO 30.5N73W TO 

31N72.5W NW WINDS 30 TO 35 KT. SEAS 11 TO 15 FT. ELSEWHERE WITHIN

31N70W TO 31N81W TO 27N80W TO 29N75W TO 30N71W TO 31N70W NW 

WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

.36 HOUR FORECAST COLD FRONT 31N70W TO 23N78W. WITHIN 31N67W TO 

31N77W TO 28N77W TO 28N74W TO 30N68W TO 31N67W NW WINDS 20 TO 30 

KT. SEAS 11 TO 14 FT. ELSEWHERE WITHIN 31N67W TO 31N81W TO 27N80W

TO 27N78W TO 29N68W TO 31N67W WINDS 20 KT OR LESS. SEAS 8 TO 12 

FT IN NE SWELL.

.48 HOUR FORECAST COLD FRONT FROM 31N65W TO 21N76W. WITHIN 

31N63W TO 31N66W TO 30N67W TO 29N65W TO 30N64W TO 31N63W SW TO W 

WINDS 20 TO 25 KT. SEAS 8 TO 11 FT IN N SWELL.



.SYNOPSIS AND FORECAST.



.ATLC LOW PRES NEAR 28N37W 1010 MB WITH COLD FRONT FROM 28N37W TO

22N43W. WITHIN 31N35W TO 29N37W TO 28N39W TO 25N39W TO 26N35W TO

31N35W W TO NW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.24 HOUR FORECAST LOW PRES NE OF AREA.COLD FRONT FROM 22N35W TO 

18N45W. WITHIN 31N35W TO 31N38W TO 30N38W TO 30N36W TO 29N35W TO 

31N35W N WINDS 20 TO 25 KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 

31N35W TO 31N42W TO 27N40W TO 26N35W TO 31N35W WINDS 20 KT OR 

LESS. SEAS 8 TO 10 FT IN NW TO N SWELL.

.48 HOUR FORECAST LOW PRES E OF AREA. DISSIPATING COLD FRONT 

FROM 19N35W TO 15N45W. WITHIN 31N35W TO 31N41W TO 28N41W TO 

26N39W TO 27N36W TO 31N35W N TO NE WINDS 20 TO 30 KT. SEAS 11 TO 

14 FT. ELSEWHERE WITHIN 31N35W TO 31N44W TO 27N45W TO 24N41W TO 

25N35W TO 31N35W N WINDS 20 TO 25 KT. SEAS 8 TO 11 FT IN N TO NE 

SWELL.



.CARIBBEAN 03 HOUR FORECAST WITHIN 13N72W TO 13N73W TO 12N75W TO

11N75W TO 12N72W TO 13N72W NE WINDS 20 TO 25 KT. SEAS LESS THAN

8 FT.

.09 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS

LESS THAN 8 FT.



.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.



$$

.FORECASTER DELGADO. NATIONAL HURRICANE CENTER.