WHUS73 KDLH 122018

MWWDLH



URGENT - MARINE WEATHER MESSAGE

National Weather Service Duluth MN

218 PM CST Fri Dec 12 2025



LSZ140>143-130830-

/O.CON.KDLH.SC.Y.0138.000000T0000Z-251213T0000Z/

/O.CON.KDLH.GL.W.0036.251213T0000Z-251213T1400Z/

Grand Portage to Grand Marais MN-

Grand Marais to Taconite Harbor MN-

Taconite Harbor to Silver Bay Harbor MN-

Silver Bay Harbor to Two Harbors MN-

218 PM CST Fri Dec 12 2025



...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS

EVENING...

...GALE WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 8 AM

CST SATURDAY...



* WHAT...For the Small Craft Advisory, northwest winds 15 to 20 kt

  with gusts up to 30 kt and waves 1 to 2 ft. For the Gale

  Warning, northwest winds 15 to 20 kt with gusts up to 35 kt and

  waves up to 5 ft expected.



* WHERE...Grand Portage to Grand Marais MN, Grand Marais to 

  Taconite Harbor MN, Taconite Harbor to Silver Bay Harbor MN 

  and Silver Bay Harbor to Two Harbors MN.



* WHEN...For the Small Craft Advisory, until 6 PM CST this 

  evening. For the Gale Warning, from 6 PM this evening to 8 AM 

  CST Saturday.



* 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.



&&



$$



LSZ146-147-150-130830-

/O.CON.KDLH.SC.Y.0138.000000T0000Z-251214T1000Z/

/O.CON.KDLH.UP.W.0007.251213T0000Z-251213T1000Z/

Port Wing to Sand Island WI-Sand Island to Bayfield WI-

Outer Apostle Islands Beyond 5 NM from Mainland-

218 PM CST Fri Dec 12 2025



...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST SUNDAY...

...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 6 PM THIS

EVENING TO 4 AM CST SATURDAY...



* WHAT...For the Small Craft Advisory, northwest winds 20 to 30 

  kt and waves 3 to 6 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, Sand Island to Bayfield 

  WI and Outer Apostle Islands Beyond 5 NM from Mainland.



* WHEN...For the Small Craft Advisory, until 4 AM CST Sunday. 

  For the Heavy Freezing Spray Warning, from 6 PM this evening 

  to 4 AM CST Saturday.



* 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.



&&



$$



LSZ121-144-145-148-130830-

/O.CON.KDLH.SC.Y.0138.000000T0000Z-251214T1000Z/

Chequamegon Bay-Bayfield to Oak Point WI-Two Harbors to Duluth MN-

Duluth MN to Port Wing WI-Oak Point to Saxon Harbor WI-

218 PM CST Fri Dec 12 2025



...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST SUNDAY...



* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and 

  waves 1 to 4 ft.



* WHERE...Chequamegon Bay-Bayfield to Oak Point WI, Two Harbors 

  to Duluth MN, Duluth MN to Port Wing WI and Oak Point to Saxon 

  Harbor WI.



* WHEN...Until 4 AM CST Sunday.



* IMPACTS...Conditions will be hazardous to small craft.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Anyone operating a smaller vessel should avoid navigating in

hazardous conditions.



&&



$$