FZNT01 KWBC 270405
HSFAT1 0430
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC FRI SEP 27 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 27.
24 HOUR FORECAST VALID 0000 UTC SEP 28.
48 HOUR FORECAST VALID 0000 UTC SEP 29.
.WARNINGS.
…HURRICANE WARNING…
.TROPICAL STORM ISAAC NEAR 37.1N 49.8W 995 MB AT 0300 UTC SEP 27
MOVING E OR 090 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 55 KT
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM NE
QUADRANT…40 NM SE QUADRANT…50 NM SW QUADRANT AND 40 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 60 NM NE…120 NM
SE…150 NM SW…AND 240 NM NW QUADRANTS…WITH SEAS TO 17 FT.
ELSEWHERE FROM 33N TO 40N BETWEEN 45W AND 56W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.24 HOUR FORECAST HURRICANE ISAAC NEAR 38.1N 44.1W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS
WITHIN 70 NM NE QUADRANT…100 NM SE QUADRANT…80 NM SW
QUADRANT AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 180
NM E AND 180 NM W SEMICIRCLES… WITH SEAS TO 27 FT. ELSEWHERE
WITHIN 300 NM OF CENTER…EXCEPT 240 NM SW QUADRANT WINDS 20 TO
33 KT. SEAS 9 TO 13 FT.
.48 HOUR FORECAST HURRICANE ISAAC 41.1N 37.9W. MAXIMUM SUSTAINED
WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 165
NM NE…130 NM SE…100 NM SW…AND 130 NM NW QUADRANTS. SEAS 12
FT OR GREATER WITHIN 180 NM NE…360 NM SE…240 NM SW AND 240
NM NW QUADRANTS…WITH SEAS TO 30 FT. ELSEWHERE FROM 32N TO 46N
E OF 43W WINDS 20 TO 33 KT. SEAS TO 12 FT.
…HURRICANE WARNING…
.HURRICANE HELENE NEAR 29.9N 83.9W 938 MB AT 0300 UTC SEP 27.
MAXIMUM SUSTAINED WINDS 120 KT GUSTS 140 KT. TROPICAL STORM
FORCE WINDS WITHIN 240 NM NE…270 NM SE…100 NM SW…AND 120
NM NW QUADRANTS. ELSEWHERE FROM 31N TO 34N W OF 76W WINDS 20 TO
33 KT. SEAS TO 13 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE HELENE NEAR 36.9N 86.2W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 50 KT. ELSEWHERE FROM 31N TO
38N W OF 73W WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE HELENE NEAR 36.9N 86.9W.
MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.
…GALE WARNING…
.LOW 42N42W 1011 MB MOVING NE 15 KT. WITHIN 180 NM N SEMICIRCLE
WINDS 25 TO 35 KT. SEAS 9 TO 13 FT. EXCEPT WHERE DESCRIBED WITH
TROPICAL STORM ISAAC ABOVE…ELSEWHERE FROM 40N TO 46N E OF 54W
WINDS 20 TO 30 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW E OF AREA. EXCEPT WHERE DESCRIBED WITH
HURRICANE ISAAC ABOVE…WITHIN 240 NM W AND N OF A LINE FROM
40N44W TO 42N35W WINDS 20 TO 30 KT. SEAS 9 TO 13 FT.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS E OF AREA.
…GALE WARNING…
.24 HOUR FORECAST LOW 44N62W 1008 MB. FROM 40N TO 48N BETWEEN
56W AND 65W WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW 42N54W 1002 MB. WITHIN 180 NM N SEMICIRCLE
AND 300 NM W QUADRANT WINDS 25 TO 35 KT. SEAS TO 12 FT.
ELSEWHERE WITHIN 300 NM N AND 420 NM W SEMICIRCLES WINDS 20 TO
30 KT. SEAS TO 10 FT.
.SYNOPSIS AND FORECAST.
.LOW 60N36W 1011 MB MOVING E 15 KT. WITHIN 300 NM S SEMICIRCLE
WINDS 20 TO 30 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA.
.24 HOUR FORECAST FROM 63N TO 65N BETWEEN GREENLAND AND 53W
WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST WITHIN 120 NM OF THE W COAST OF GREENLAND N OF
63N WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW E OF AREA 64N30W 1004 MB. N OF 61N E OF
38W WINDS 20 TO 30 KT. SEAS 9 TO 13 FT.
.FORECASTER SHAW. 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 0000 UTC FRI SEP 27.
24 HOUR FORECAST VALID 0000 UTC SAT SEP 28.
48 HOUR FORECAST VALID 0000 UTC SUN SEP 29.
.WARNINGS.
…GULF OF MEXICO HURRICANE WARNING…
.HURRICANE HELENE NEAR 29.9N 83.9W 938 MB AT 0300 UTC SEP 27
MOVING NNE OR 015 DEG AT 21 KT. MAXIMUM SUSTAINED WINDS 120 KT
GUSTS 140 KT. TROPICAL STORM FORCE WINDS WITHIN 240 NM NE
QUADRANT…270 NM SE QUADRANT…100 NM SW QUADRANT…AND 120 NM
NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM NE
QUADRANT…340 NM SE QUADRANT…420 NM SW QUADRANT…AND 120 NM
NW QUADRANT WITH SEAS TO 35 FT. ELSEWHERE WITHIN 31N76W TO 29N83W
TO 31N87W TO 30N93W TO 24N84W TO 24N79W TO 31N76W… INCLUDING
STRAITS OF FLORIDA AND ATLANTIC EXPOSURES…WINDS 20 TO 33 KT.
SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 28N92W TO 30N93W TO
27N96W TO 22N93W TO 20N86W TO 21N79W TO 28N92W… INCLUDING
STRAITS OF FLORIDA AND IN YUCATAN CHANNEL…WINDS 20 KT OR LESS.
SEAS 8 TO 12 FT IN MIXED SWELL.
.12 HOUR FORECAST TROPICAL STORM HELENE INLAND NEAR 33.9N 84.0W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 75 KT.
.24 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.9N
86.2W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 50 KT. WITHIN 31N77W
TO 31N80W TO 28N80W TO 28N78W TO 31N77W WINDS 20 TO 30 KT. SEAS 8
TO 11 FT. ELSEWHERE WITHIN 30N74W TO 31N74W TO 31N77W TO 30N78W
TO 28N78W TO 28N77W TO 30N74W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.9N
86.9W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. OVER FORECAST
WATERS CONDITIONS IMPROVE. 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.
…ATLANTIC GALE WARNING…
.LOW PRES NEAR 16N40W 1007 MB. WITHIN 19N38W TO 19N41W TO 16N41W
TO 15N41W TO 15N39W TO 17N38W TO 19N38W WINDS 20 TO 30 KT. SEAS
8 TO 12 FT. ELSEWHERE WITHIN 20N36W TO 21N40W TO 19N41W TO 18N38W
TO 16N38W TO 16N35W TO 20N36W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN MIXED SWELL.
.12 HOUR FORECAST LOW PRES…POSSIBLE TROPICAL CYCLONE..NEAR
17N43W 1007 MB. WITHIN 18N42W TO 18N42.5W TO 17.5N43W TO 17N43W
TO 17N42.5W TO 17.5N42W TO 18N42W WINDS 30 TO 35 KT. SEAS 12 TO
16 FT. ELSEWHERE WITHIN 20N38W TO 21N41W TO 19N45W TO 15N43W TO
19N37W TO 20N38W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW PRES…POSSIBLE TROPICAL CYCLONE…NEAR
18N44W 1005 MB. WITHIN 19N44W TO 19N45W TO 18N45W TO 18N44W TO
19N44W WINDS 30 TO 40 KT. SEAS 12 TO 16 FT. ELSEWHERE WITHIN
20N41W TO 20N43W TO 19N45W TO 18N46W TO 17N44W TO 18N41W TO
20N41W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA
WITHIN 21N41W TO 22N45W TO 19N47W TO 16N46W TO 19N40W TO 21N41W
WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW PRES…POSSIBLE TROPICAL CYCLONE…NEAR
19N48W 1005 MB. WITHIN 20N46W TO 20N48W TO 19N48W TO 18N47W TO
19N47W TO 20N46W WINDS 30 T00 TX 1
