FZNT01 KWBC 200933
HSFAT1 1030
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC FRI SEP 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 20.
24 HOUR FORECAST VALID 0600 UTC SEP 21.
48 HOUR FORECAST VALID 0600 UTC SEP 22.
.WARNINGS.
…STORM WARNING…
.LOW 54N44W 999 MB MOVING S 10 KT. WITHIN 420 NM N…300 NM NW
AND 240 NM W QUADRANTS WINDS 30 TO 45 KT. SEAS 10 TO 19 FT.
ELSEWHERE WITHIN 540 NM NE…360 NM NW…300 NM W…180 NM S AND
180 NM SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 51N43W 1002 MB. WITHIN 120 NM W AND NW OF
LINE FROM 57N44W TO 58N41W TO 62N38W WINDS 45 TO 60 KT. SEAS 15
TO 26 FT. ELSEWHERE WITHIN AN AREA BOUNDED BY 65N35W…63N35W
…60N40W…57N43W…52N48W…52N51W…56N50W…64N43W…65N35W
WINDS 30 TO 45 KT. SEAS 10 TO 20 FT. ALSO WITHIN 420 NM W AND SW
SEMICIRCLES WINDS 20 TO 30 KT. SEAS 9 TO 13 FT.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED WITH LOW
53N40W 997 MB.
…STORM WARNING…
.LOW 46N47W 1009 MB MOVING NE 25 KT. FROM 43N TO 47N BETWEEN 42W
AND 53W WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 52N41W 997 MB. WITHIN 180 NM N SEMICIRCLE
AND 240 NM E QUADRANT WINDS 25 TO 40 KT. SEAS 9 TO 15 FT.
.48 HOUR FORECAST LOW 53N40W 997 MB. FROM 58N TO 61N BETWEEN 42W
AND 46W WINDS 40 TO 55 KT. SEAS 12 TO 24 FT. ELSEWHERE WITHIN AN
AREA BOUNDED BY 62N40W…57N40W…52N47W…52N53W…57N52W
…59N46W…62N42W…62N40W WINDS 30 TO 45 KT. SEAS 10 TO 21 FT.
ALSO WITHIN 540 NM N…540 NM W AND 300 NM S SEMICIRCLES WINDS
20 TO 30 KT. SEAS 9 TO 13 FT.
…GALE WARNING…
.COMPLEX LOW WITH MAIN LOW 39N69W 1004 MB NEARLY STATIONARY AND
SECONDARY LOW 41N65W MOVING E 20 KT. WITHIN 180 NM NW SEMICIRCLE
OF MAIN LOW…ALSO WITHIN 180 NM N SEMICIRCLE AND 240 NM SE
QUADRANT OF SECONDARY LOW WINDS 25 TO 35 KT. SEAS TO 12 FT.
.24 HOUR FORECAST MAIN LOW 40N69W 1004 MB AND SECONDARY LOW
41N55W 1009 MB. WITHIN 180 NM N AND W SEMICIRCLES OF MAIN LOW
WINDS 25 TO 40 KT. SEAS 10 TO 15 FT. ELSEWHERE FROM 40N TO 44N
BETWEEN 53W AND 71W WINDS 20 TO 30 KT. SEAS T
