FZNT01 KWBC 291616
HSFAT1 1630
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC SUN SEP 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC SEP 29.
24 HOUR FORECAST VALID 1200 UTC SEP 30.
48 HOUR FORECAST VALID 1200 UTC OCT 01.
.WARNINGS.
…HURRICANE WARNING…
.HURRICANE ISAAC NEAR 43.2N 35.6W 971 MB AT 1500 UTC SEP 29
MOVING NE OR 045 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 65 KT
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 180 NM NE
QUADRANT…150 NM SE QUADRANT…120 NM SW QUADRANT…AND 160 NM
NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 360 NM W
SEMICIRCLE…270 NM NE QUADRANT AND 480 NM SE QUADRANT WITH SEAS
TO 31 FT. ELSEWHERE S OF 49N E OF 41W WINDS 20 TO 33 KT. SEAS TO
12 FT.
.12 HOUR FORECAST TROPICAL STORM ISAAC NEAR 44.0N 33.6W. MAXIMUM
SUSTAINED WINDS 55 KT GUSTS 65 KT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE ISAAC NEAR 45.1N 30.3W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 120 NM OF CENTER. SEAS 12 FT OR GREATER WITHIN 360
NM NE QUADRANT…300 NM SE QUADRANT…120 NM SW QUADRANT…AND
240 NM NW QUADRANT WITH SEAS TO 25 FT. ELSEWHERE FROM 41N TO 50N
E OF 37W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.36 HOUR FORECAST POST-TROPICAL CYCLONE ISAAC NEAR 46.6N 26.8W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE ISAAC NEAR 48.5N 25.0W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 30 NM S SEMICIRCLE…170 NM NE QUADRANT AND 100 NM
NW QUADRANT. SEAS 12 FT OR GREATER
WITHIN 180 NM N SEMICIRCLE…300 SE QUADRANT…AND 150 NM SW
QUADRANT WITH SEAS TO 17 FT. ELSEWHERE S OF 40N E OF 44W WINDS 20
TO 33 KT. SEAS TO 12 FT.
…GALE WARNING…
.LOW 41N53W 998 MB MOVING SE 10 KT. FROM 32N TO 47N BETWEEN 40W
AND 63W WINDS 25 TO 35 KT…HIGHEST N AND NW OF CENTER. SEAS 8 TO
15 FT.
.24 HOUR FORECAST LOW 39N47W 1000 MB. S OF 40N E OF 50W AND FROM
40N TO 49N BETWEEN 37W AND 58W WINDS 25 TO 35 KT…HIGHEST SE OF
CENTER. SEAS 8 TO 14 FT IN A MIXED SWELL.
.48 HOUR FORECAST LOW 44N46W 997 MB. WITHIN 240 NM N AND NW
QUADRANTS WINDS 25 TO 35
