FZNT01 KWBC 280402
HSFAT1 0430
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC SEP 28.
24 HOUR FORECAST VALID 0000 UTC SEP 29.
48 HOUR FORECAST VALID 0000 UTC SEP 30.
.WARNINGS.
…HURRICANE WARNING…
HURRICANE ISAAC NEAR 38.2N 43.4W 973 MB AT 0300 UTC SEP 28
MOVING ENE OR 075 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 80 KT
GUSTS 100 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 180 NM S SEMICIRCLE…120 NM NE QUADRANT
AND 150 NM NW QUADRANT WITH SEAS TO 34 FT. ELSEWHERE S OF 45N
BETWEEN 38W AND 50W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.24 HOUR FORECAST HURRICANE ISAAC NEAR 41.0N 38.6W. 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 NM NE
QUADRANT…420 NM SE QUADRANT…240 NM SW QUADRANT AND 300 NM NW
QUADRANT WITH SEAS TO 32 FT. ELSEWHERE S OF 47N BETWEEN 45W AND
35W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM ISAAC NEAR 43.8N 35.4W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 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
240 NM N QUADRANT…300 NM S QUADRANT…540 NM SW QUADRANT AND
360 NM NW QUADRANT WITH SEAS TO 28 FT. ELSEWHERE S OF 50N E OF
50W WINDS 20 TO 33 KT. SEAS TO 12 FT.
…GALE WARNING…
.LOW 45N61W 1008 MB MOVING SE 15 KT. FROM 40N TO 48N BETWEEN 55W
AND 64W WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 42N54W 1001 MB.
FROM 35N TO 47N BETWEEN 50W AND 63W WINDS 25 TO 35 KT. SEAS TO 12
FT. .48 HOUR FORECAST LOW 40N51W 1000 MB. S OF 46N BETWEEN 44W
AND
61W WINDS 25 TO 35 KT. SEAS 8 TO 15 FT.
…GALE WARNING…
.24 HOUR FORECAST N OF 62N W OF GREENLAND COAST AREA OF SE TO S
WINDS TO 25 KT. SEAS TO 8 FT.
.36 HOUR FORECAST WITHIN 120 NM OF W GREENLAND COAST N OF 61N W
OF 47W WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST NEW LOW 67N56W 991 MB. WITHIN 90 NM OF W
GREENLAND COAST N OF 61N W OF 48W AND WITHIN 240 NM S QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT…HIGHEST NEAR 65N58W.
ELSEWHERE N OF 60N W OF GREENLAND WINDS 20 TO 30 KT. SEAS TO 10
FT.
.SYNOPSIS AND FORECAST.
.FROM 31N TO 38N W OF 72W AREA OF S TO SW WINDS 20 TO 30 KT. SEAS
8 TO 12 FT IN MIXED SWELL…HIGHEST NEAR 33N75W.
.24 HOUR FORECAST CONDITIONS IMPROVED.
.LOW E OF THE AREA 46N30W 997 MB MOVING NE 20 KT. FROM 44N TO
49N E OF 37W WINDS TO 25 KT. SEAS 8 TO 15 FT IN MIXED SWELL.
.06 HOUR FORECAST LOW AND CONDITIONS E OF THE AREA.
.24 HOUR FORECAST LOW E OF AREA 64N30W 1004 MB. N OF 62N E OF 38W
AREA OF N TO NE WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED. WITHIN AN AREA BOUNDED BY A
LINE FROM 59N40W TO 60N43W TO 62N40W TO 59N40W AND WITHIN 180 NM
E AND SE OF A LINE FROM 60N50W TO 56N52W TO 53N56W AREA OF S TO
SW WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 39N TO 41N W OF 69W 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 N
OF 64N W OF 58W.
.48 HOUR FORECAST CONDITIONS IMPROVED.
.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 SAT SEP 28.
24 HOUR FORECAST VALID 0000 UTC SUN SEP 29.
48 HOUR FORECAST VALID 0000 UTC MON SEP 30.
.WARNINGS.
…ATLANTIC TROPICAL STORM WARNING…
.TROPICAL STORM JOYCE NEAR 18.9N 44.7W 1004 MB AT 0300 UTC SEP
28 MOVING WNW OR 300 DEG AT 10 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…75 NM NE QUADRANT AND 45 NM
NW QUADRANT WITH SEAS TO 14 FT. ELSEWHERE WITHIN 20N42W TO
21N44W TO 20N46W TO 18N46W TO 18N43W TO 19N41W TO 20N42W WINDS 20
TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 21N39W TO
23N42W TO 20N46W TO 18N46W TO 17N44W TO 19N38W TO 21N39W WINDS 20
KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM JOYCE NEAR 19.7N 47.7W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS
WITHIN 20 NM S SEMICIRCLE…50 NM NE QUADRANT AND 40 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 105 NM NE QUADRANT AND 90
NM NW QUADRANT WITH SEAS TO 15 FT. ELSEWHERE WITHIN 22N44W TO
22N46W TO 21N49W TO 20N49W TO 19N47W TO 20N45W TO 22N44W WINDS 20
TO 33 KT. SEAS 9 TO 11 FT. REMAINDER OF AREA WITHIN 23N42W TO
24N46W TO 23N50W TO 20N51W TO 18N49W TO 20N41W TO 23N42W WINDS 20
KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM JOYCE NEAR 21.0N 49.5W. 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. SEAS 12 FT OR GREATER WITHIN 60 NM NE QUADRANT WITH
SEAS TO 12 FT. ELSEWHERE WITHIN 22N48W TO 22N50W TO 21N50W TO
20N50W TO 20N49W TO 21N48W TO 22N48W WINDS 20 TO 33 KT. SEAS 9 TO
11 FT. REMAINDER OF AREA WITHIN 25N48W TO 25N50W TO 21N54W TO
21N48W TO 22N46W TO 25N48W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
IN MIXED SWELL.
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 WITHIN 31N73W TO 31N80W TO 29N79W TO 29N75W TO 31N73W
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN S TO SW SWELL.
.12 HOUR FORECAST CONDITIONS IMPROV
