812
WHUS73 KDLH 201256
MWWDLH
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DULUTH MN
656 AM CST SAT DEC 20 2025
LSZ145>148-150-210100-
/O.CON.KDLH.GL.W.0044.000000T0000Z-251221T0400Z/
/O.CON.KDLH.UP.W.0010.251220T1800Z-251221T1000Z/
DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI-
SAND ISLAND TO BAYFIELD WI-OAK POINT TO SAXON HARBOR WI-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
656 AM CST SAT DEC 20 2025
..GALE WARNING REMAINS IN EFFECT UNTIL 10 PM CST THIS EVENING
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM NOON TODAY
TO 4 AM CST SUNDAY...
* WHAT...FOR THE GALE WARNING, WEST WINDS 25 TO 35 KT WITH GUSTS
UP TO 45 KT AND WAVES 6 TO 9 FT. FOR THE HEAVY FREEZING SPRAY
WARNING, HEAVY FREEZING SPRAY AT A RATE OF 2 CM PER HOUR OR
GREATER EXPECTED, AND MAY RAPIDLY ACCUMULATE ON VESSELS.
* WHERE...DULUTH MN TO PORT WING WI, PORT WING TO SAND ISLAND
WI, SAND ISLAND TO BAYFIELD WI, OAK POINT TO SAXON HARBOR WI
AND OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND.
* WHEN...FOR THE GALE WARNING, UNTIL 10 PM CST THIS EVENING. FOR
THE HEAVY FREEZING SPRAY WARNING, FROM NOON TODAY TO 4 AM CST
SUNDAY.
* IMPACTS...OPERATING A VESSEL IN HEAVY FREEZING SPRAY IS
HAZARDOUS. FREEZING SPRAY MAY RENDER MECHANICAL AND ELECTRONIC
COMPONENTS INOPERATIVE. RAPID ICE ACCRETION ON DECKS AND
SUPERSTRUCTURES MAY RESULT IN A CATASTROPHIC LOSS OF
STABILITY. STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD PREPARE FOR DANGEROUS ACCUMULATION OF ICE ON
THEIR VESSEL. IF POSSIBLE, REMAIN IN PORT, AVOID THE WARNING AREA
OR CONDUCT MITIGATION.
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR HAZARDOUS CONDITIONS.
LSZ140-210100-
/O.CON.KDLH.GL.W.0044.000000T0000Z-251221T1000Z/
/O.CON.KDLH.UP.W.0010.251220T1800Z-251221T0400Z/
GRAND PORTAGE TO GRAND MARAIS MN-
656 AM CST SAT DEC 20 2025
..GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CST SUNDAY
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM NOON TODAY
TO 10 PM CST THIS EVENING...
* WHAT...FOR THE GALE WARNING, WEST WINDS 20 TO 30 KT WITH GUSTS
UP TO 40 KT AND WAVES 6 TO 9 FT. FOR THE HEAVY FREEZING SPRAY
WARNING, HEAVY FREEZING SPRAY AT A RATE OF 2 CM PER HOUR OR
GREATER EXPECTED, AND MAY RAPIDLY ACCUMULATE ON VESSELS.
* WHERE...GRAND PORTAGE TO GRAND MARAIS MN.
* WHEN...FOR THE GALE WARNING, UNTIL 4 AM CST SUNDAY. FOR THE
HEAVY FREEZING SPRAY WARNING, FROM NOON TODAY TO 10 PM CST
THIS EVENING.
* IMPACTS...OPERATING A VESSEL IN HEAVY FREEZING SPRAY IS
HAZARDOUS. FREEZING SPRAY MAY RENDER MECHANICAL AND ELECTRONIC
COMPONENTS INOPERATIVE. RAPID ICE ACCRETION ON DECKS AND
SUPERSTRUCTURES MAY RESULT IN A CATASTROPHIC LOSS OF
STABILITY. STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD PREPARE FOR DANGEROUS ACCUMULATION OF ICE ON
THEIR VESSEL. IF POSSIBLE, REMAIN IN PORT, AVOID THE WARNING AREA
OR CONDUCT MITIGATION.
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR HAZARDOUS CONDITIONS.
LSZ121-210100-
/O.CON.KDLH.GL.W.0044.000000T0000Z-251221T0400Z/
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
656 AM CST SAT DEC 20 2025
..GALE WARNING REMAINS IN EFFECT UNTIL 10 PM CST THIS EVENING
* WHAT...WEST WINDS 15 TO 25 KT WITH GUSTS UP TO 35 KT AND WAVES
1 TO 2 FT.
* WHERE...CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI.
* WHEN...UNTIL 10 PM CST THIS EVENING.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR HAZARDOUS CONDITIONS.
LSZ141>144-210100-
/O.CON.KDLH.GL.W.0044.000000T0000Z-251221T0400Z/
GRAND MARAIS TO TACONITE HARBOR MN-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN-
656 AM CST SAT DEC 20 2025
..GALE WARNING REMAINS IN EFFECT UNTIL 10 PM CST THIS EVENING
* WHAT...WEST WINDS 15 TO 25 KT WITH GUSTS UP TO 35 KT AND WAVES
2 TO 5 FT.
* WHERE...GRAND MARAIS TO TACONITE HARBOR MN, TACONITE HARBOR TO
SILVER BAY HARBOR MN, SILVER BAY HARBOR TO TWO HARBORS MN AND
TWO HARBORS TO DULUTH MN.
* WHEN...UNTIL 10 PM CST THIS EVENING.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR HAZARDOUS CONDITIONS.
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