High Seas Forecast
Issued by NWS

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000
FZNT01 KWBC 280404
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC TUE SEP 28 2021

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

METAREA IV BULLETIN WILL ONLY BE BROADCAST FROM THE INMARSAT
AOE SATELLITE. PLEASE ENSURE YOUR RECEIVER IS POINTED
CORRECTLY.

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 0000 UTC SEP 28.
24 HOUR FORECAST VALID 0000 UTC SEP 29.
48 HOUR FORECAST VALID 0000 UTC SEP 30.

.WARNINGS.

...GALE WARNING...
.LOW INLAND NEAR 56N73W 990 MB MOVING SW 05 KT. WITHIN 480 NM N
AND NE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW 54N74W 1007 MB. FROM 58N TO 62N W OF
64W...INCLUDING THE HUDSON STRAIT...WINDS 20 TO 30 KT. SEAS TO 8
FT.
.48 HOUR FORECAST LOW DISSIPATED INLAND AND ASSOCIATED CONDITIONS
DIMINISHED.

...GALE WARNING...
.LOW 54N60W 995 MB MOVING NE 05 KT. WITHIN 360 NM NE AND 480 NM E
QUADRANTS WINDS 25 TO 35 KT. SEAS TO 11 FT. ELSEWHERE FROM 37N TO
57N BETWEEN 43W AND 55W AND WITHIN 480 NM S QUADRANT WINDS 20 TO
30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 56N59W 1004 MB. WITHIN 180 NM NW QUADRANT
WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS
DIMINISHED.

.SYNOPSIS AND FORECAST.

.LOW 32N58W 1012 MB MOVING N 05 KT. WITHIN 120 NM OF LOW...EXCEPT
NW QUADRANT...WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW...POSSIBLE TROPICAL CYCLONE...35N57W 1012
MB. WITHIN 120 NM SE QUADRANT WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW...POSSIBLE TROPICAL CYCLONE...40N54W 1014
MB. WITHIN 240 NM E AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 9
FT.

.FROM 38N TO 44N W OF 67W SW WINDS TO 25 KT. SEAS LESS THAN 8
FT.
.24 HOUR FORECAST NEW LOW 53N56W 1003 MB. WITHIN 300 NM SE OF
FRONT FROM 51N54W TO 38N76W SW TO S WINDS 20 TO 30 KT. SEAS TO 8
FT.
.48 HOUR FORECAST LOW 55N37W 1011 MB. FROM 48N TO 52N E OF 46W W
WINDS 20 TO 30 KT. SEAS TO 11 FT.

.EXCEPT WHERE OTHERWISE DESCRIBED...N OF 45N E OF 48W WINDS LESS
THAN 25 KT. SEAS TO 12 FT IN MIXED SWELL.
.24 HOUR FORECAST N OF 57N E OF 49W WINDS LESS THAN 25 KT. SEAS
TO 12 FT IN MIXED SWELL.
.48 HOUR FORECAST N OF 52N E OF 47W WINDS LESS THAN 25 KT. SEAS
TO 12 FT IN MIXED SWELL.

.24 HOUR FORECAST NEW LOW 55N39W 998 MB. FROM 48N TO 57N E OF 49W
AND WITHIN 300 NM SE OF FRONT FROM 50N35W TO 44N43W WINDS 20 TO
30 KT. SEAS TO 12 FT. ELSEWHERE FROM 36N TO 48N E OF 52W WINDS
LESS THAN 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS MOVED E OF AREA.

.48 HOUR FORECAST NEW LOW 43N63W 1007 MB.FROM 33N TO 53N BETWEEN
56W AND 77W WINDS TO 25 KT. SEAS TO 9 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM W AND
SW OF A LINE FROM 60N64W TO 55N57W TO 51N48W TO 47N48W TO
45N48W.
.24 HOUR FORECAST DENSE FOG FROM 53N TO 56N W OF 41W.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.HIGH 55N36W 1019 MB MOVING SE 25 KT.
.24 HOUR FORECAST HIGH MOVED E OF AREA.

.HIGH 36N70W 1018 MB MOVING NE 45 KT.
.24 HOUR FORECAST HIGH 43N47W 1021 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST HIGH 31N77W 1019 MB.
.48 HOUR FORECAST HIGH 31N78W 1018 MB.

.FORECASTER JOSEPH. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 0000 UTC TUE SEP 28.
24 HOUR FORECAST VALID 0000 UTC WED SEP 29.
48 HOUR FORECAST VALID 0000 UTC THU SEP 30.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE SAM NEAR 16.8N 53.2W 956 MB AT 0300 UTC SEP 28 MOVING
NW OR 315 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130
KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NW AND SE
QUADRANTS...110 NM NE QUADRANT AND 70 NM SW QUADRANT. SEAS 12 FT
OR GREATER WITHIN 120 NM N SEMICIRCLE AND 90 NM S SEMICIRCLE WITH
SEAS TO 34 FT. ELSEWHERE WITHIN 15N52W TO 15N54W TO 18N55W TO
19N52W TO 17N51W TO 15N52W WINDS 20 TO 33 KT. SEAS 10 TO 12.
REMAINDER OF AREA WITHIN 15N49W TO 13N53W TO 15N58W TO 20N56W TO
20N50W TO 15N49W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED
SWELL.
.24 HOUR FORECAST HURRICANE SAM NEAR 18.4N 55.1W. MAXIMUM
SUSTAINED WINDS 115 KT GUSTS 140 KT. LITTLE CHANGE IN TROPICAL
STORM FORCE WINDS. SEAS 12 FT OR GREATER WITHIN 135 NM N AND 120
NM S SEMICIRCLES WITH SEAS TO 35 FT. ELSEWHERE WITHIN 17N55W TO
18N57W TO 20N57W TO 20N55W TO 19N53W TO 17N55W WINDS 20 TO 33 KT.
SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 17N51W TO 14N55W TO
16N60W TO 21N60W TO 23N52W TO 17N51W WINDS 20 KT OR LESS. SEAS 8
TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE SAM NEAR 20.6N 58.0W. MAXIMUM
SUSTAINED WINDS 110 KT GUSTS 135 KT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM NW AND SE QUADRANTS...120 NM NE QUADRANT AND 70 NM
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM OF CENTER WITH
SEAS TO 33 FT. ELSEWHERE WITHIN 19N57W TO 19N60W TO 22N61W TO
23N59W TO 22N56W TO 19N57W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT.
REMAINDER OF AREA WITHIN 18N54W TO 15N62W TO 19N64W TO 25N62W TO
25N55W TO 18N54W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED
SWELL.
.72 HOUR FORECAST HURRICANE SAM NEAR 24.3N 61.0W. MAXIMUM
SUSTAINED WINDS 110 KT GUSTS 135 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE SAM NEAR 29.6N 61.5W. MAXIMUM
SUSTAINED WINDS 105 KT GUSTS 130 KT.
.120 HOUR FORECAST HURRICANE SAM NEAR 37.5N 56.9W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT.

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.

.ATLC 36 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...
NEAR 08N35W 1010 MB. WITHIN 07N35W TO 07N35W TO 09N37W TO 10N37W
TO 11N35W TO 07N35W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
08N37W 1010 MB. WITHIN 07N35W TO 07N38W TO 09N39W TO 12N39W TO
13N35W TO 07N35W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

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


.FORECASTER AREINHART. NATIONAL HURRICANE CENTER.

$$


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