FZNT01 KWBC 280930
HSFAT1 1030
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC SAT SEP 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 28.
24 HOUR FORECAST VALID 0600 UTC SEP 29.
48 HOUR FORECAST VALID 0600 UTC SEP 30.
.WARNINGS.
…HURRICANE WARNING…
.HURRICANE ISAAC NEAR 39.2N 41.5W 968 MB AT 0900 UTC SEP 28
MOVING NE OR 055 DEG AT 17 KT. MAXIMUM SUSTAINED WINDS 90 KT
GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N
SEMICIRCLE…130 NM SE QUADRANT AND 110 NM SW QUADRANT. SEAS 12
FT OR GREATER WITHIN 360 NM S SEMICIRCLE…120 NM NE QUADRANT
AND 240 NM NW QUADRANT WITH SEAS TO 37 FT. ELSEWHERE S OF 44N E
OF 48W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.24 HOUR FORECAST HURRICANE ISAAC NEAR 42.1N 37.0W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 120 NM NW AND SE QUADRANTS…130 NM NE QUADRANT AND 110
NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NE
QUADRANT…420 NM SE QUADRANT…360 NM SW QUADRANT AND 300 NM NW
QUADRANT WITH SEAS TO 32 FT. ELSEWHERE S OF 47N E OF 45W WINDS 20
TO 33 KT. SEAS TO 12 FT.
.48 HOUR FORECAST POST-TROPICAL ISAAC E OF AREA NEAR 44.6N 33.1W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE
WINDS WITHIN 170 NM NE QUADRANT…130 NM SE QUADRANT…110 NM SW
QUADRANT…AND 150 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
480 NM W SEMICIRCLE WITH SEAS TO 27 FT. ELSEWHERE S OF 50N E OF
45W WINDS 20 TO 33 KT. SEAS TO 12 FT.
…GALE WARNING…
.LOW 44N60W 1008 MB MOVING SE 15 KT. FROM 38N TO 47N BETWEEN 54W
AND 64W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 41N53W 1000 MB.
FROM 34N TO 46N BETWEEN 45W AND 62W WINDS 25 TO 35 KT. SEAS 8 TO
14 FT.
.48 HOUR FORECAST LOW 40N49W 999 MB. S OF 47N BETWEEN 45W AND
57W WINDS 25 TO 35 KT. SEAS 8 TO 15 FT.
…GALE WARNING…
.WITHIN 60 NM E OF A LINE FROM 65N54W TO 63N53W AREA OF SE TO S
WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 120 NM OF W GREENLAND COAST N OF 61N W
OF 48W WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.36 HOUR FORECAST WITHIN 120 NM OF W GREENLAND COAST N OF 61N AND
FROM 63N TO 65N BETWEEN 60W AND 64W WINDS 30 TO 40 KT. SEAS 8 TO
15 FT.
.48 HOUR FORECAST NEW LOW 65N61W 999 MB. FROM 60N TO 65N W OF 60W
AND FROM 60N TO 62N WITHIN 60 NM W OF GREENLAND COAST WINDS 20 TO
30 KT. SEAS TO 11 FT.
.SYNOPSIS AND FORECAST.
.FROM 31N TO 38N W OF 72W AREA OF S TO SW WINDS 20 TO 30 KT. SEAS
TO 11 FT.
.24 HOUR FORECAST CONDITIONS IMPROVED.
.24 HOUR FORECAST LOW E OF AREA 64N30W 1004 MB. N OF 62N E OF 37W
AREA OF N WINDS TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW DISSIPATED. WITHIN AN AREA BOUNDED BY A
LINE FROM 59N35W TO 65N35W TO 60N43W TO 59N35W AND WITHIN 120 NM
NW OF A LINE FROM 52N52W TO 58N44W AREA OF S TO SW WINDS TO 25
KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 39N TO 41N W OF 70W AREA OF E WINDS TO 25
KT. SEAS TO 8 FT.
.48 HOUR FORECAST CONDITIONS IMPROVED.
.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 120 NM W AND NW OF A LINE FROM 61N60W TO 67N54W.
.48 HOUR FORECAST N OF 65N E OF 56W TO THE W COAST OF GREENLAND.
.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 0600 UTC SAT SEP 28.
24 HOUR FORECAST VALID 0600 UTC SUN SEP 29.
48 HOUR FORECAST VALID 0600 UTC MON SEP 30.
.WARNINGS.
…ATLANTIC TROPICAL STORM WARNING…
.TROPICAL STORM JOYCE NEAR 19.5N 45.3W 1004 MB AT 0900 UTC SEP
28 MOVING NW OR 305 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 20 NM S
SEMICIRCLE…40 NM NE QUADRANT AND 90 NM NW QUADRANT. SEAS 12 FT
OR GREATER WITHIN 0 NM S SEMICIRCLE…120 NM NE QUADRANT AND 90
NM NW QUADRANT WITH SEAS TO 14 FT. ELSEWHERE WITHIN 21N43W TO
22N44W TO 22N46W TO 20N46W TO 18N45W TO 20N42W TO 21N43W WINDS 20
TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 21N39W TO
24N43W TO 23N45W TO 20N48W TO 17N46W TO 18N41W TO 21N39W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM JOYCE NEAR 20.5N 48.2W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS
WITHIN 50 NM NE QUADRANT…20 NM SE QUADRANT…0 NM SW
QUADRANT…AND 40 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 45
NM W SEMICIRCLE AND 30 NM NE QUADRANT WITH SEAS TO 14 FT.
ELSEWHERE WITHIN 21N47W TO 22N48W TO 21N49W TO 19N48W TO 19N47W
TO 21N47W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA
WITHIN 24N46W TO 24N49W TO 20N52W TO 19N51W TO 19N44W TO 20N42W
TO 24N46W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM JOYCE NEAR 21.7N 49.6W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS
WITHIN 20 NM NW AND SE QUADRANTS…30 NM NE QUADRANT AND 0 NM SW
QUADRANT. ELSEWHERE WITHIN 22N49W TO 23N49W TO 22N50W TO 21N50W
TO 21N49W T
