FZNT01 KWBC 270939
HSFAT1 1030
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC SEP 27.
24 HOUR FORECAST VALID 0600 UTC SEP 28.
48 HOUR FORECAST VALID 0600 UTC SEP 29.
.WARNINGS.
…HURRICANE WARNING…
.HURRICANE ISAAC NEAR 37.0N 48.5W 981 MB AT 0900 UTC SEP 27
MOVING E OR 090 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 65 KT
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM NE
QUADRANT…60 NM SE QUADRANT…60 NM SW QUADRANT AND 60 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 70 NM NE…150 NM
SE…150 NM SW…AND 240 NM NW QUADRANTS…WITH SEAS TO 21 FT.
ELSEWHERE FROM 32N TO 40N BETWEEN 40W AND 55W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.24 HOUR FORECAST HURRICANE ISAAC NEAR 38.8N 42.4W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM NE QUADRANT…120 NM SE QUADRANT…100 NM SW
QUADRANT AND 90 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240
NM S SEMICIRCLE…120 NM NW AND 90 NM NE QUADRANTS…WITH SEAS
TO 30 FT. ELSEWHERE FROM 32N TO 44N BETWEEN 35W AND 47W WINDS 20
TO 33 KT. SEAS 9 TO 13 FT.
.48 HOUR FORECAST HURRICANE ISAAC 41.8N 37.3W. MAXIMUM SUSTAINED
WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS WITHIN 190
NM NE…130 NM SE…110 NM SW…AND 120 NM NW QUADRANTS. SEAS 12
FT OR GREATER WITHIN 240 NM NE…360 NM SE…300 NM SW AND 240
NM NW QUADRANTS…WITH SEAS TO 30 FT. ELSEWHERE FROM 31N TO 47N
E OF 43W WINDS 20 TO 33 KT. SEAS TO 12 FT.
…TROPICAL STORM WARNING…
.TROPICAL STORM HELENE NEAR 32.8N 83.0W 968 MB AT 0900 UTC SEP
27. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 80 KT. TROPICAL STORM
FORCE WINDS WITHIN 240 NM E SEMICIRCLE…100 NM SW AND 60 NM NW
QUADRANTS. ELSEWHERE FROM 31N TO 35N W OF 74W WINDS 20 TO 33 KT.
SEAS 8 TO 17 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE HELENE NEAR 36.9N 87.3W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. ELSEWHERE FROM 31N TO
38N W OF 72W WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE HELENE NEAR 36.7N 87.0W.
MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.
…GALE WARNING…
.LOW 43N37W 1008 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 WITHIN 240 NM N AND NW OF
A LINE FROM 43N35W TO 43N37W TO 40N47W TO 38N52W WINDS 20 TO 30
KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA.
…GALE WARNING…
.24 HOUR FORECAST LOW 45N59W 1007 MB. FROM 40N TO 48N BETWEEN
55W AND 65W WINDS 20 TO 30 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW 42N53W 1000 MB. WITHIN 240 NM N SEMICIRCLE
WINDS 25 TO 35 KT. SEAS TO 12 FT. ELSEWHERE WITHIN 300 NM N
SEMICIRCLE…ALSO WITHIN 420 NM NW AND 480 NM SW QUADRANTS WINDS
20 TO 30 KT. SEAS TO 11 FT.
…GALE WARNING…
.24 HOUR FORECAST FROM 62N TO 65N BETWEEN GREENLAND AND 53W
WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST N OF 65N BETWEEN GREENLAND AND 56W WINDS 25 TO
35 KT. SEAS TO 10 FT. ELSEWHERE WITHIN 120 NM OF THE W COAST OF
GREENLAND WINDS 20 TO 30 KT. SEAS TO 8 FT.
.SYNOPSIS AND FORECAST.
.LOW 59N33W 1010 MB MOVING E 15 KT. WITHIN 360 NM SW QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA.
.48 HOUR FORECAST N OF 62N E OF 36W WINDS TO 25 KT. SEAS TO 11
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 0600 UTC FRI SEP 27.
24 HOUR FORECAST VALID 0600 UTC SAT SEP 28.
48 HOUR FORECAST VALID 0600 UTC SUN SEP 29.
.WARNINGS.
…GULF OF MEXICO AND ATLANTIC TROPICAL STORM WARNING…
.TROPICAL STORM HELENE NEAR 32.8N 83.0W 968 MB AT 0900 UTC SEP
27 MOVING N OR 360 DEG AT 26 KT. MAXIMUM SUSTAINED WINDS 60 KT
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 240 NM E
SEMICIRCLE…100 NM SW QUADRANT AND 60 NM NW QUADRANT. SEAS 12 FT
OR GREATER WITHIN 240 NM NE QUADRANT…380 NM SE QUADRANT…390
NM SW QUADRANT…AND 0 NM NW QUADRANT WITH SEAS TO 17 FT.
ELSEWHERE WITHIN 31N74W TO 28N80W TO 31N81W TO 30N88W TO 24N84W
TO 25N76W TO 31N74W…INCLUDING STRAITS OF FLORIDA AND ATLANTIC
EXPOSURES…WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA
WITHIN 27N87W TO 30N89W TO 30N92W TO 27N93W TO 22N87W TO 24N82W
TO 27N87W…INCLUDING STRAITS OF FLORIDA…WINDS 20 KT OR LESS.
SEAS 8 TO 11 FT IN MIXED SWELL.
.12 HOUR FORECAST POST-TROPICAL HELENE NEAR 36.4N 84.5W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT.
.24 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.9N
87.3W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 31N73W
TO 31N79W TO 29N78W TO 29N77W TO 30N75W TO 31N73W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN S TO SW SWELL.
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.7N
87.0W. 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 17N42W 1007 MB. WITHIN 18N39W TO 19N42W TO 18N43W
TO 16N43W TO 16N41W TO 17N40W TO 18N39W WINDS 20 TO 30 KT. SEAS
8 TO 11 FT. ELSEWHERE WITHIN 22N35W TO 23N40W TO 21N43W TO 18N44W
TO 16N40W TO 17N35W TO 22N35W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN MIXED SWELL.
.12 HOUR FORECAST LOW PRES…POSSIBLE TROPICAL CYCLONE…NEAR
18N44W 1007 MB. WITHIN 18.5N43.5W TO 19N43.5W TO 19N44W TO
18.5N44.5W TO 18N44W TO 18N43.5W TO 18.5N43.5W WINDS 30 TO 35
KT. SEAS 12 TO 13 FT. ELSEWHERE WITHIN 20N41W TO 20N42W TO
20N44W TO 18N45W TO 17N43W TO 18N42W TO 20N41W WINDS 20 TO 30
KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 24N39W TO 22N46W
TO 18N46W TO 19N41W TO 17N42W TO 18N35W TO 24N39W WINDS 20 KT OR
LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST LOW PRES…POSSIBLE TROPICAL CYCLONE…NEAR
19N46W 1004 MB. WITHIN 20N45W TO 20N46W TO 19N46W TO 19N45W TO
20N45W WINDS 30 TO 40 KT. SEAS 12 TO 14 FT. ELSEWHERE WITHIN
21N42W TO 22N45W TO 20N47W TO 17N46W TO 17N45W TO 18N43W TO
21N42W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA
WITHIN 21N39W TO 24N43W TO 22N48W TO 18N47W TO 17N42W TO 19N39W
TO 21N39W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW PRES…POSSIBLE TROPICAL CYCLONE…NEAR
20N49W 1006 MB. WITHIN 21N48W TO 21N49W TO 20N50W TO 20N48W TO
21N48W WINDS 30 TO 40 KT. SEAS 10 TO 12 FT. ELSEWHERE
