819
WHUS73 KDLH 180109
MWWDLH
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DULUTH MN
709 PM CST WED DEC 17 2025
LSZ148-150-181315-
/O.CON.KDLH.SC.Y.0144.000000T0000Z-251218T0200Z/
/O.CON.KDLH.GL.W.0041.251218T0200Z-251218T1000Z/
/O.CON.KDLH.GL.W.0042.251218T2000Z-251219T1000Z/
/O.NEW.KDLH.UP.W.0009.251219T0000Z-251219T1000Z/
OAK POINT TO SAXON HARBOR WI-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
709 PM CST WED DEC 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CST THIS
EVENING...
..GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CST THURSDAY
...GALE WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 PM THURSDAY TO
4 AM CST FRIDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, WAVES 1 TO 2 FT. FOR THE
FIRST GALE WARNING, SOUTH WINDS 15 TO 25 KT WITH GUSTS UP TO
35 KT AND WAVES 2 TO 5 FT EXPECTED. FOR THE SECOND GALE
WARNING, NORTH WINDS 20 TO 25 KT WITH GUSTS UP TO 40 KT AND
WAVES 6 TO 9 FT EXPECTED. 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...OAK POINT TO SAXON HARBOR WI AND OUTER APOSTLE ISLANDS
BEYOND 5 NM FROM MAINLAND.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 8 PM CST THIS
EVENING. FOR THE FIRST GALE WARNING, UNTIL 4 AM CST THURSDAY.
FOR THE SECOND GALE WARNING, FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY. FOR THE HEAVY FREEZING SPRAY WARNING, FROM 6 PM
THURSDAY TO 4 AM CST FRIDAY.
* 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.
LSZ121-181315-
/O.CON.KDLH.SC.Y.0144.000000T0000Z-251218T2000Z/
/O.CON.KDLH.GL.W.0042.251218T2000Z-251219T1000Z/
/O.NEW.KDLH.UP.W.0009.251219T0000Z-251219T1000Z/
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
709 PM CST WED DEC 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM CST
THURSDAY...
...GALE WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 PM THURSDAY TO
4 AM CST FRIDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTHWEST WINDS 10 TO 20
KT WITH GUSTS UP TO 30 KT AND WAVES 1 TO 2 FT. FOR THE GALE
WARNING, NORTHWEST WINDS 15 TO 25 KT WITH GUSTS UP TO 40 KT
AND WAVES UP TO 3 FT EXPECTED. 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...CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 2 PM CST THURSDAY.
FOR THE GALE WARNING, FROM 2 PM THURSDAY TO 4 AM CST FRIDAY.
FOR THE HEAVY FREEZING SPRAY WARNING, FROM 6 PM THURSDAY TO 4
AM CST FRIDAY.
* 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.
LSZ145>147-181315-
/O.CON.KDLH.SC.Y.0144.000000T0000Z-251218T2000Z/
/O.CON.KDLH.GL.W.0042.251218T2000Z-251219T1000Z/
/O.NEW.KDLH.UP.W.0009.251219T0000Z-251219T1000Z/
DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI-
SAND ISLAND TO BAYFIELD WI-
709 PM CST WED DEC 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM CST
THURSDAY...
...GALE WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 PM THURSDAY TO
4 AM CST FRIDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTHWEST WINDS 15 TO 25
KT WITH GUSTS UP TO 30 KT AND WAVES 1 TO 4 FT. FOR THE GALE
WARNING, NORTHWEST WINDS 20 TO 30 KT WITH GUSTS UP TO 45 KT
AND WAVES 6 TO 9 FT EXPECTED. 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
AND SAND ISLAND TO BAYFIELD WI.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 2 PM CST THURSDAY.
FOR THE GALE WARNING, FROM 2 PM THURSDAY TO 4 AM CST FRIDAY.
FOR THE HEAVY FREEZING SPRAY WARNING, FROM 6 PM THURSDAY TO 4
AM CST FRIDAY.
* 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.
LSZ143-144-181315-
/O.CON.KDLH.SC.Y.0144.000000T0000Z-251218T2000Z/
/O.CON.KDLH.GL.W.0042.251218T2000Z-251219T1000Z/
SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN-
709 PM CST WED DEC 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM CST
THURSDAY...
...GALE WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTHWEST WINDS 10 TO 20
KT WITH GUSTS UP TO 30 KT AND WAVES 2 TO 5 FT. FOR THE GALE
WARNING, NORTHWEST WINDS 20 TO 30 KT WITH GUSTS UP TO 40 KT
AND WAVES 3 TO 6 FT EXPECTED.
* WHERE...SILVER BAY HARBOR TO TWO HARBORS MN AND TWO HARBORS TO
DULUTH MN.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 2 PM CST THURSDAY.
FOR THE GALE WARNING, FROM 2 PM THURSDAY TO 4 AM CST FRIDAY.
* 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.
LSZ140-141-181315-
/O.CON.KDLH.SC.Y.0144.251218T0200Z-251218T2000Z/
/O.CON.KDLH.GL.W.0042.251218T2000Z-251219T1000Z/
GRAND PORTAGE TO GRAND MARAIS MN-
GRAND MARAIS TO TACONITE HARBOR MN-
709 PM CST WED DEC 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM CST
THURSDAY...
...GALE WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTHWEST WINDS 10 TO 20
KT WITH GUSTS UP TO 30 KT AND WAVES 4 TO 7 FT EXPECTED. FOR
THE GALE WARNING, NORTH WINDS 20 TO 30 KT WITH GUSTS UP TO 50
KT AND WAVES 3 TO 6 FT EXPECTED.
* WHERE...GRAND PORTAGE TO GRAND MARAIS MN AND GRAND MARAIS TO
TACONITE HARBOR MN.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 2 PM CST THURSDAY.
FOR THE GALE WARNING, FROM 2 PM THURSDAY TO 4 AM CST FRIDAY.
* 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.
LSZ142-181315-
/O.CON.KDLH.SC.Y.0144.251218T0200Z-251218T2000Z/
/O.CON.KDLH.GL.W.0042.251218T2000Z-251219T1000Z/
TACONITE HARBOR TO SILVER BAY HARBOR MN-
709 PM CST WED DEC 17 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM CST
THURSDAY...
...GALE WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 4 AM CST
FRIDAY...
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTHWEST WINDS 5 TO 15
KT WITH GUSTS UP TO 25 KT AND WAVES 1 TO 4 FT EXPECTED. FOR
THE GALE WARNING, NORTH WINDS 20 TO 30 KT WITH GUSTS UP TO 45
KT AND WAVES 2 TO 5 FT EXPECTED.
* WHERE...TACONITE HARBOR TO SILVER BAY HARBOR MN.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 2 PM CST THURSDAY.
FOR THE GALE WARNING, FROM 2 PM THURSDAY TO 4 AM CST FRIDAY.
* 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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