646
FZNT01 KWBC 260420
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC THU SEP 26 2024

CCODE/2:31:04:11:00/AOE+AOW/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

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 26.
24 HOUR FORECAST VALID 0000 UTC SEP 27.
48 HOUR FORECAST VALID 0000 UTC SEP 28.

.WARNINGS.

...HURRICANE WARNING...
.24 HOUR FORECAST HURRICANE HELENE NEAR 29.5N 84.5W. MAXIMUM
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS
WITHIN 270 NM E SEMICIRCLE AND 140 NM W SEMICIRCLE. ELSEWHERE S
OF 34N W OF 76W WINDS 20 TO 33 KT. SEAS TO 14 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE HELENE NEAR 36.7N 87.1W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 50 KT. ELSEWHERE S OF 38N W
OF 73W WINDS TO 25 KT. SEAS TO 10 FT.

...TROPICAL STORM WARNING...
.TROPICAL STORM ISAAC NEAR 37.1N 54.1W 997 MB AT 0300 UTC SEP 26
MOVING E OR 085 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NE
QUADRANT...50 NM SE QUADRANT...40 NM SW QUADRANT AND 80 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM S SEMICIRCLE WITH
SEAS TO 15 FT.
.24 HOUR FORECAST TROPICAL STORM ISAAC 37.3N 49.8W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS
WITHIN 70 NM NE QUADRANT...60 NM SE QUADRANT...50 NM SW QUADRANT
AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM OF
CENTER WITH SEAS TO 16 FT.
.48 HOUR FORECAST TROPICAL STORM ISAAC 38.8N 43.2W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS
WITHIN 90 NM NE QUADRANT...130 NM SE QUADRANT...70 NM SW
QUADRANT AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 180
NM S AND 120 NM N SEMICIRCLES WITH SEAS TO 18 FT. ELSEWHERE
WITHIN 360 NM SE...240 NM SW...300 NM NE AND N QUADRANTS WINDS
20 TO 33 KT. SEAS TO 12 FT.

...GALE WARNING...
.WITHIN 180 NM W AND NW OF A LINE FROM 40N47W TO 40N52W TO
38N57W WINDS 25 TO 35 KT. SEAS 9 TO 17 FT.
.24 HOUR FORECAST WITHIN 180 NM N AND NW OF A LINE FROM 41N35W
TO 43N40W TO 40N50W TO 36N54W WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST CONDITIONS DESCRIBED ABOVE WITH TROPICAL STORM
ISAAC.

...GALE WARNING...
.LOW 61N42W 1012 MB MOVING SE 10 KT. WITHIN 120 NM S AND SW OF A
LINE FROM 61N40W TO 60N45W TO 62N50W WINDS 20 TO 30 KT. SEAS TO
9 FT.
.12 HOUR FORECAST LOW 60N40W 1010 MB. WITHIN 120 NM SW OF A LINE
FROM 61N49W TO 59N45W WINDS 25 TO 35 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 60N35W 1011 MB. WITHIN 300 NM S SEMICIRCLE
AND WITHIN 120 NM E OF THE COAST OF GREENLAND S OF 64N WINDS 20
TO 30 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW AND CONDITIONS E OF AREA.

.SYNOPSIS AND FORECAST.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 120 NM OF THE W COAST OF GREENLAND BETWEEN 61N AND 65N
.24 HOUR FORECAST CONDITIONS IMPROVED.

.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 THU SEP 26.
24 HOUR FORECAST VALID 0000 UTC FRI SEP 27.
48 HOUR FORECAST VALID 0000 UTC SAT SEP 28.

.WARNINGS.

...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING...
.HURRICANE HELENE NEAR 23.1N 86.6W 972 MB AT 0300 UTC SEP 26
MOVING N OR 360 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 75 KT GUSTS
90 KT. TROPICAL STORM FORCE WINDS WITHIN 210 NM NE QUADRANT...300
NM SE QUADRANT...90 NM SW QUADRANT...AND 120 NM NW QUADRANT.
SEAS 12 FT OR GREATER WITHIN 150 NM W SEMICIRCLE...240 NM NE
QUADRANT AND 270 NM SE QUADRANT WITH SEAS TO 28 FT.
ELSEWHERE...WITHIN 24N80W TO 28N83W TO 26N90W TO 22N91W TO 17N85W
TO 17N82W TO 24N80W...INCLUDING STRAITS OF FLORIDA...WINDS 20 TO
33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST HURRICANE HELENE NEAR 29.5N 84.5W. MAXIMUM
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS
WITHIN 270 NM E SEMICIRCLE AND 140 NM W SEMICIRCLE. SEAS 12 FT OR
GREATER WITHIN 240 NM E SEMICIRCLE...150 NM SW QUADRANT...AND
180 NM SE QUADRANT WITH SEAS TO 40 FT. ELSEWHERE...WITHIN 31N76W
TO 27N86W TO 30N86W TO 27N97W TO 24N97W TO 21N80W TO
31N76W...INCLUDING STRAITS OF FLORIDA AND IN YUCATAN
CHANNEL...WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.36 HOUR FORECAST TROPICAL STORM HELENE INLAND NEAR 34.3N 84.7W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 70 KT. OVER FORECAST
WATERS...TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER
WITHIN 210 NM E SEMICIRCLE AND 120 NM SW QUADRANT WITH SEAS TO 18
FT. ELSEWHERE...WITHIN 31N76W TO 29N81W TO 31N81W TO 30N87W TO
28N88W TO 24N80W TO 31N76W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT.
REMAINDER OF AREA...WITHIN 31N74W TO 31N86W TO 27N97W TO 23N97W
TO 22N92W TO 24N79W TO 31N74W...INCLUDING STRAITS OF FLORIDA AND
IN YUCATAN CHANNEL...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN
MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 36.7N
87.1W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 50 KT. OVER FORECAST
WATERS...WITHIN 31N78W TO 31N80W TO 29N80W TO 28N79W TO 29N78W TO
31N78W WINDS 20 TO 30 KT. SEAS 8 TO 10 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.

.ATLC LOW PRES NEAR 15N35W 1009 MB. WITHIN 20N35W TO 20N36W TO
17N36W TO 16N36W TO 15N36W TO 15N35W TO 20N35W NE TO E WINDS 20
TO 30 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17N40W 1008 MB. WITHIN 18N38W TO 19N40W TO 19N42W TO 17N42W TO
16N41W TO 17N37W TO 18N38W WINDS 20 TO 30 KT. SEAS 10 TO 11 FT.
ELSEWHERE...WITHIN 21N37W TO 22N39W TO 20N42W TO 17N43W TO
15N39W TO 17N35W TO 21N37W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT
IN MIXED SWELL.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
18N45W 1007 MB. WITHIN 19N42W TO 20N43W TO 20N45W TO 19N44W TO
18N42W TO 19N42W WINDS 20 TO 30 KT. SEAS 10 TO 11 FT.
ELSEWHERE...WITHIN 21N39W TO 22N44W TO 21N46W TO 18N47W TO
16N45W TO 18N41W TO 21N39W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT
IN MIXED SWELL.

.ATLC 12 HOUR FORECAST WITHIN 31N60W TO 31N64W TO 30N64W TO
30N61W TO 31N60W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N TO NE
SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST CONDITIONS IMPROVE.

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

$$
.FORECASTER KONARIK. NATIONAL HURRICANE CENTER.