FZNT01 KWBC 202136
HSFAT1 2230
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC SEP 20.
24 HOUR FORECAST VALID 1800 UTC SEP 21.
48 HOUR FORECAST VALID 1800 UTC SEP 22.
.WARNINGS.
…STORM WARNING…
.LOW 53N45W 1001 MB MOVING SE 15 KT. WITHIN 180 NM NW OF A LINE
FROM 55N45W TO 61N37W WINDS 45 TO 60 KT. SEAS 15 TO 23 FT.
ELSEWHERE FROM 46N TO 57N W OF 45W AND FROM 60N TO 64N E OF
GREENLAND COAST WINDS 30 TO 45 KT. SEAS 9 TO 16 FT. ALSO N OF 64N
E OF GREENLAND COAST AND WITHIN 420 NM NW QUADRANT WINDS 20 TO 30
KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED WITH LOW
52N41W BELOW.
…STORM WARNING…
.LOW 49N40W 1003 MB MOVING N 20 KT. FROM 42N TO 53N E OF 46W
WINDS 25 TO 40 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 52N41W 994 MB. FROM 56N TO 62N BETWEEN 39W
AND 46W WINDS 40 TO 50 KT. SEAS 18 TO 24 FT. ELSEWHERE FROM 44N
TO 64N E OF 44W AND WITHIN 540 NM W SEMICIRCLE WINDS 25 TO 40 KT.
SEAS 9 TO 18 FT.
.48 HOUR FORECAST COMBINED LOW 53N44W 999 MB. FROM 57N TO 60N
BETWEEN 40W AND 50W WINDS 35 TO 45 KT. ELSEWHERE FROM 46N TO 59N
W OF 50W AND FROM 54N TO 61N E OF 50W WINDS 20 TO 35 KT. SEAS 9
TO 16 FT…HIGHEST N AND W OF CENTER.
…GALE WARNING…
.COMPLEX LOW WITH MAIN LOW 39N68W 1004 MB NEARLY STATIONARY AND
SECOND LOW 40N61W 1004 MB MOVING E 15 KT. WITHIN 300 NM NW
SEMICIRCLE OF MAIN LOW…AND WITHIN 300 NM N AND E SEMICIRCLES OF
SECOND LOW WINDS 25 TO 40 KT. SEAS 8 TO 14 FT…HIGHEST N AND W
OF EACH LOW CENTER.
.24 HO
