FZNT01 KWBC 300330
HSFAT1 0430
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC MON SEP 30 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
THE NATIONAL WEATHER SERVICE IS ACCEPTING PUBLIC COMMENTS UNTIL
OCTOBER 16 2024 ON A PROPOSAL TO REPLACE FEET WITH METERS WHEN
DESCRIBING SEAS IN A VARIETY OF NATIONAL MARINE CENTER TEXT AND
GRAPHICAL PRODUCTS FOR THE HIGH SEAS AREAS ONLY.
TO LEARN MORE PLEASE VISIT (WEB ADDRESS LOWERCASE)
HTTPS://OCEAN.WEATHER.GOV/PROPOSED-METERS.PHP
FROM OCTOBER 15 TO APRIL 1, DUE TO THE CLIMATOLOGY OF THE NORTH
ATLANTIC AND THE FREQUENCY AND VOLUME OF WEATHER HAZARDS, ALONG
WITH CUSTOMER FEEDBACK, HIGH SEAS FORECASTS WILL BE LIMITED TO
WINDS OF 25 TO 35 KNOTS AND HIGHER, AND SEAS OF 12 FEET OR
GREATER, ALONG WITH FREEZING SPRAY, DENSE FOG, VOLCANIC ASH,
AND ANYTHING TROPICAL (INCLUDING A DEPRESSION). LESSER
CONDITIONS WILL BE INCLUDED FOR WARNING CONDITIONS AND TO
PRESERVE CONTINUITY WHERE APPROPRIATE.
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 30.
24 HOUR FORECAST VALID 0000 UTC OCT 01.
48 HOUR FORECAST VALID 0000 UTC OCT 02.
.WARNINGS.
…TROPICAL STORM WARNING…
.TROPICAL STORM ISAAC NEAR 44.4N 32.8W 975 MB AT 0300 UTC SEP 30
MOVING NE OR 055 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 55 KT
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM NE
QUADRANT…130 NM SE QUADRANT…140 NM SW QUADRANT…AND 190 NM
NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 420 NM W
SEMICIRCLE…270 NM NE QUADRANT AND 540 NM SE QUADRANT WITH SEAS
TO 28 FT. ELSEWHERE FROM 33N TO 49N E OF 45W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.12 HOUR FORECAST POST-TROPICAL CYCLONE ISAAC NEAR 45.1N 30.1W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE ISAAC NEAR 46.7N
26.4W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM
FORCE WINDS WITHIN 100 NM OF CENTER EXCEPT 130 NM NE QUADRANT.
SEAS 12 FT OR GREATER WITHIN 180 NM NE QUADRANT…420 NM SE
QUADRANT…330 NM SW QUADRANT AND 270 NM NW QUADRANT WITH SEAS TO
23 FT. ELSEWHERE WITHIN 600 NM W SEMICIRCLE WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE ISAAC NEAR 50.7N
23.1W. MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM
FORCE WINDS WITHIN 190 NM NE QUADRANT…120 NM SE QUADRANT…0
NM SW QUADRANT…AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER
WITHIN 180 NM NE QUADRANT…210 NM SE QUADRANT…240 NM SW
QUADRANT AND 180 NM NW QUADRANT WITH SEAS TO 17 FT.
…GALE WARNING…
.LOW 40N51W 997 MB MOVING NE 10 KT. FROM 33N TO 49N BETWEEN 45W
AND 60W WINDS 20 TO 30 KT IN MIXED SWELL. SEAS 8 TO 14
FT…HIGHEST S AND W OF CENTER.
.24 HOUR FORECAST LOW 42N44W 998 MB. BETWEEN 120 NM AND 600 NM SE
QUADRANT WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. ELSEWHERE WITHIN 540
NM W AND 480 NM N QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 13
FT…HIGHEST NEAR 45N43W.
.48 HOUR FORECAST LOW 44N48W 989 MB. BETWEEN 180 NM AND 300 NM
NE…WITHIN 120 NM SE…180 NM SW QUADRANTS AND BETWEEN 60 NM AND
240 NM NW SEMICIRCLE WINDS 30 TO 45 KT. SEAS 10 TO 20 FT.
ELSEWHERE WITHIN 660 NM N…540 NM NE…240 NM SE…600 NM SW AND
480 NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
…GALE WARNING…
.COMPLEX LOW WITH MAIN CENTER 63N53W 1000 MB MOVING NE 15 KT.
WITHIN 90 NM E OF A FRONT FROM 60N52W TO 67N55W TO THE W COAST OF
GREENLAND WINDS 30 TO 40 KT. SEAS 9 TO 15 FT. ELSEWHERE FROM 52N
TO 60N BETWEEN 47W AND 56W AND WITHIN 360 NM W SEMICIRCLE WINDS
20 TO 30 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW DISSIPATED INLAND AND NEW LOW TO FORM
65N59W 1016 MB. FROM 63N TO 65N BETWEEN 57W AND 64W WINDS TO 25
KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW DISSIPATED. WITHIN 180 NM SW AND W OF A
LINE FROM 58N57W TO 65N61W AREA OF SE TO S WINDS TO 25 KT. SEAS
LESS THAN 8 FT.
.SYNOPSIS AND FORECAST.
WITHIN 90 NM W AND NW OF A LINE FROM 60N39W TO 62N37W AREA OF S
WINDS LESS THAN 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST WITHIN AN AREA BOUNDED BY A LINE FROM 60N44W TO
64N35W TO 58N35W TO 60N44W AREA OF SW WINDS 20 TO 30 KT. SEAS TO
10 FT.
.48 HOUR FORECAST NEW LOW 61N40W 1012 MB. WITHIN 300 NM NE
QUADRANT AND WITHIN 90 NM N AND NE OF A LINE FROM 58N46W TO
60N51W TO GREENLAND WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST NEW LOW 35N69W 1010 MB. WITHIN 120 NM N AND NE
OF A LINE FROM 37N76W TO 37N70W TO 36N66W AREA OF NE TO E WINDS
TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST W OF A LINE FROM 35N65W TO 40N68W AREA OF NE TO
E WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST FROM 44N TO 51N BETWEEN 58W AND 64W…INCLUDING
THE GULF OF SAINT LAWRENCE AND WITHIN 90 NM W OF A LINE FROM
50N53W TO 54N54W AREA OF N TO NE WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N FROM 61N TO 64N E
OF 55W TO THE W COAST OF GREENLAND.
.24 HOUR FORECAST CONDITIONS IMPROVED.
.48 HOUR FORECAST DENSE FOG N OF 64N E OF GREENLAND COAST.
.FORECASTER FUTTERMAN. 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 MON SEP 30.
24 HOUR FORECAST VALID 0000 UTC TUE OCT 01.
48 HOUR FORECAST VALID 0000 UTC WED OCT 02.
.WARNINGS.
…ATLC HURRICANE WARNING…
.TROPICAL DEPRESSION TWELVE E OF AREA NEAR 13.9N 33.2W 1006 MB
AT 0300 UTC SEP 30 MOVING W OR 280 DEG AT 6 KT. MAXIMUM
SUSTAINED WINDS 30 KT GUSTS 40 KT. FROM 15N TO 18N BETWEEN 35W
AND 37W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN E SWELL.
.12 HOUR FORECAST TROPICAL STORM TWELVE NEAR 14.0N 34.6W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.24 HOUR FORECAST TROPICAL STORM TWELVE NEAR 14.2N 36.8W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 90 NM NE QUADRANT…50 NM SE QUADRANT…20 NM SW
QUADRANT…AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
THE AREA OF TROPICAL STORM FORCE WINDS WITH SEAS TO 14 FT.
ELSEWHERE FROM 12N TO 18N BETWEEN 35W AND 40W WINDS 20 TO 33 KT.
SEAS 8 TO 12 FT.
.48 HOUR FORECAST HURRICANE TWELVE NEAR 15.2N 40.6W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS
WITHIN 140 NM NE QUADRANT…130 NM SE QUADRANT…60 NM SW
QUADRANT…AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
120 NM OF CENTER…EXCEPT 60 NM SW QUADRANT WITH SEAS TO 24 FT.
ELSEWHERE FROM 10N TO 20N BETWEEN 35W AND 44W WINDS 20 TO 33 KT.
SEAS 8 TO 12 FT.
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.
.TROPICAL DEPRESSION JOYCE NEAR 22.3N 49.6W 1006 MB AT 0300 UTC
SEP 30 MOVING NW OR 310 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 30
KT GUSTS 40 KT. SEAS 12 FT OR GREATER WITHIN 0 NM S
SEMICIRCLE…60 NM NE QUADRANT AND 30 NM NW QUADRANT WITH SEAS
TO 13 FT. ELSEWHERE FROM 21N TO 24N BETWEEN 46W AND 51W WINDS 20
TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW JOYCE NEAR 23.6N
49.8W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 120 NM
NE QUADRANT OF CENTER WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW JOYCE NEAR 25.7N
49.6W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. WINDS 20 KT OR
LESS. SEAS LESS THAN 8 FT.
FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK…SIZE
AND INTENSITY.
.ATLC 18 HOUR FORECAST N OF 30N BETWEEN 50W AND 56W WINDS 20 KT
OR LESS. SEAS 8 TO 9 FT IN NE SWELL.
.24 HOUR FORECAST N OF 29N BETWEEN 44W AND 56W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.
.48 HOUR FORECAST N OF 30N BETWEEN 40W AND 45W WINDS 20 KT OR
LESS. SEAS 8 FT IN N TO NE SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.FORECASTER GR. NATIONAL HURRICANE CENTER.
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UUID 63D82912-7EDC-11EF-949E-0AFB0B270000 TX 1
