396  
WHUS73 KDLH 210904  
MWWDLH  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE DULUTH MN  
304 AM CST TUE JAN 21 2025  
 
LSZ150-212115-  
/O.CON.KDLH.UP.W.0002.000000T0000Z-250122T1200Z/  
/O.CON.KDLH.SC.Y.0010.000000T0000Z-250122T2200Z/  
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-  
304 AM CST TUE JAN 21 2025  
 
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 6 AM CST  
WEDNESDAY...  
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CST  
WEDNESDAY...  
 
* WHAT...FOR THE HEAVY FREEZING SPRAY WARNING, HEAVY FREEZING  
SPRAY AT A RATE OF 2 CM PER HOUR OR GREATER MAY RAPIDLY  
ACCUMULATE ON VESSELS. FOR THE SMALL CRAFT ADVISORY, SOUTHWEST  
WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND WAVES 3 TO 6 FT.  
 
* WHERE...OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND.  
 
* WHEN...FOR THE HEAVY FREEZING SPRAY WARNING, UNTIL 6 AM CST  
WEDNESDAY. FOR THE SMALL CRAFT ADVISORY, UNTIL 4 PM CST  
WEDNESDAY.  
 
* 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. CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
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.  
 
ANYONE OPERATING A SMALLER VESSEL SHOULD AVOID NAVIGATING IN  
HAZARDOUS CONDITIONS.  
 

 
 

 
 
LSZ140>142-212115-  
/O.CON.KDLH.SC.Y.0010.000000T0000Z-250122T2200Z/  
/O.CON.KDLH.UP.W.0002.250121T2200Z-250122T1200Z/  
GRAND PORTAGE TO GRAND MARAIS MN-  
GRAND MARAIS TO TACONITE HARBOR MN-  
TACONITE HARBOR TO SILVER BAY HARBOR MN-  
304 AM CST TUE JAN 21 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CST  
WEDNESDAY...  
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 4 PM THIS  
AFTERNOON TO 6 AM CST WEDNESDAY...  
 
* WHAT...FOR THE SMALL CRAFT ADVISORY, WEST WINDS 15 TO 25 KT  
WITH GUSTS UP TO 30 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, GRAND MARAIS TO  
TACONITE HARBOR MN AND TACONITE HARBOR TO SILVER BAY HARBOR MN.  
 
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 4 PM CST WEDNESDAY.  
FOR THE HEAVY FREEZING SPRAY WARNING, FROM 4 PM THIS AFTERNOON  
TO 6 AM CST WEDNESDAY.  
 
* 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. CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
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.  
 
ANYONE OPERATING A SMALLER VESSEL SHOULD AVOID NAVIGATING IN  
HAZARDOUS CONDITIONS.  
 

 
 

 
 
LSZ146-147-212115-  
/O.CON.KDLH.SC.Y.0010.000000T0000Z-250122T2200Z/  
/O.CON.KDLH.UP.W.0002.250121T1400Z-250121T2200Z/  
PORT WING TO SAND ISLAND WI-SAND ISLAND TO BAYFIELD WI-  
304 AM CST TUE JAN 21 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CST  
WEDNESDAY...  
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 8 AM THIS  
MORNING TO 4 PM CST THIS AFTERNOON...  
 
* WHAT...FOR THE SMALL CRAFT ADVISORY, SOUTHWEST WINDS 15 TO 25  
KT WITH GUSTS UP TO 30 KT AND WAVES 2 TO 5 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...PORT WING TO SAND ISLAND WI AND SAND ISLAND TO  
BAYFIELD WI.  
 
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 4 PM CST WEDNESDAY.  
FOR THE HEAVY FREEZING SPRAY WARNING, FROM 8 AM THIS MORNING  
TO 4 PM CST THIS AFTERNOON.  
 
* 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. CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
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.  
 
ANYONE OPERATING A SMALLER VESSEL SHOULD AVOID NAVIGATING IN  
HAZARDOUS CONDITIONS.  
 

 
 

 
 
LSZ143>145-212115-  
/O.CON.KDLH.SC.Y.0010.000000T0000Z-250122T2200Z/  
SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN-  
DULUTH MN TO PORT WING WI-  
304 AM CST TUE JAN 21 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CST  
WEDNESDAY...  
 
* WHAT...SOUTHWEST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND  
WAVES 2 TO 5 FT.  
 
* WHERE...SILVER BAY HARBOR TO TWO HARBORS MN, TWO HARBORS TO  
DULUTH MN AND DULUTH MN TO PORT WING WI.  
 
* WHEN...UNTIL 4 PM CST WEDNESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
ANYONE OPERATING A SMALLER VESSEL SHOULD AVOID NAVIGATING IN  
HAZARDOUS CONDITIONS.  
 

 
 

 
 
LSZ148-212115-  
/O.CON.KDLH.SC.Y.0010.000000T0000Z-250122T2200Z/  
OAK POINT TO SAXON HARBOR WI-  
304 AM CST TUE JAN 21 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CST  
WEDNESDAY...  
 
* WHAT...SOUTHWEST WINDS 10 TO 20 KT WITH GUSTS UP TO 30 KT AND  
WAVES 1 TO 3 FT.  
 
* WHERE...OAK POINT TO SAXON HARBOR WI.  
 
* WHEN...UNTIL 4 PM CST WEDNESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
ANYONE OPERATING A SMALLER VESSEL SHOULD AVOID NAVIGATING IN  
HAZARDOUS CONDITIONS.  
 

 
 

 
 
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