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Home Return to list Ice Accretion Warning 0006 Issued by the Duluth Forecast Office
Action: New Issued At: 2026-02-23 14:04:23 472 WHUS73 KDLH 232004 MWWDLH URGENT - MARINE WEATHER MESSAGE National Weather Service Duluth MN 204 PM CST Mon Feb 23 2026 LSZ140-141-241000- /O.NEW.KDLH.SC.Y.0027.260224T0600Z-260225T1800Z/ /O.NEW.KDLH.UP.W.0006.260224T1200Z-260224T1800Z/ Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- 204 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST WEDNESDAY... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 6 AM TO NOON CST TUESDAY... * WHAT...For the Small Craft Advisory, west winds 15 to 25 kt with gusts up to 30 kt and waves 5 to 8 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...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...For the Small Craft Advisory, from midnight tonight to noon CST Wednesday. For the Heavy Freezing Spray Warning, from 6 AM to noon CST Tuesday. * 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. && $$ LSZ142-241000- /O.NEW.KDLH.SC.Y.0027.260224T0600Z-260225T1800Z/ Taconite Harbor to Silver Bay Harbor MN- 204 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST WEDNESDAY... * WHAT...West winds 15 to 25 kt with gusts up to 30 kt and waves 3 to 6 ft expected. * WHERE...Taconite Harbor to Silver Bay Harbor MN. * WHEN...From midnight tonight to noon CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ143>146-148-241000- /O.NEW.KDLH.SC.Y.0027.260224T0900Z-260225T1500Z/ Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- Duluth MN to Port Wing WI-Port Wing to Sand Island WI- Oak Point to Saxon Harbor WI- 204 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 3 AM TUESDAY TO 9 AM CST WEDNESDAY... * WHAT...West winds 15 to 25 kt with gusts up to 30 kt and waves 3 to 6 ft expected. * WHERE...Silver Bay Harbor to Two Harbors MN, Two Harbors to Duluth MN, Duluth MN to Port Wing WI, Port Wing to Sand Island WI and Oak Point to Saxon Harbor WI. * WHEN...From 3 AM Tuesday to 9 AM CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ150-241000- /O.NEW.KDLH.SC.Y.0027.260224T0600Z-260225T0300Z/ Outer Apostle Islands Beyond 5 NM from Mainland- 204 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 PM CST TUESDAY... * WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and waves 4 to 7 ft expected. * WHERE...Outer Apostle Islands Beyond 5 NM from Mainland. * WHEN...From midnight tonight to 9 PM CST Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-02-23 21:24:04 691 WHUS73 KDLH 240323 MWWDLH URGENT - MARINE WEATHER MESSAGE National Weather Service Duluth MN 923 PM CST Mon Feb 23 2026 LSZ140-141-241530- /O.CON.KDLH.SC.Y.0027.260224T0600Z-260225T1800Z/ /O.CON.KDLH.UP.W.0006.260224T1200Z-260224T1800Z/ Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- 923 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY... ...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 6 AM TO NOON CST TUESDAY... * WHAT...For the Small Craft Advisory, west winds 15 to 25 kt with gusts up to 30 kt and waves 5 to 8 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...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...For the Small Craft Advisory, until noon CST Wednesday. For the Heavy Freezing Spray Warning, from 6 AM to noon CST Tuesday. * 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. && $$ LSZ142-241530- /O.CON.KDLH.SC.Y.0027.260224T0600Z-260225T1800Z/ Taconite Harbor to Silver Bay Harbor MN- 923 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY... * WHAT...West winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 5 ft expected. * WHERE...Taconite Harbor to Silver Bay Harbor MN. * WHEN...Until noon CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ143>146-148-241530- /O.CON.KDLH.SC.Y.0027.260224T0900Z-260225T1500Z/ Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- Duluth MN to Port Wing WI-Port Wing to Sand Island WI- Oak Point to Saxon Harbor WI- 923 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 AM TUESDAY TO 9 AM CST WEDNESDAY... * WHAT...West winds 15 to 25 kt with gusts up to 30 kt and waves 2 to 5 ft expected. * WHERE...Silver Bay Harbor to Two Harbors MN, Two Harbors to Duluth MN, Duluth MN to Port Wing WI, Port Wing to Sand Island WI and Oak Point to Saxon Harbor WI. * WHEN...From 3 AM Tuesday to 9 AM CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ150-241530- /O.CON.KDLH.SC.Y.0027.260224T0600Z-260225T0300Z/ Outer Apostle Islands Beyond 5 NM from Mainland- 923 PM CST Mon Feb 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CST TUESDAY... * WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and waves 3 to 6 ft expected. * WHERE...Outer Apostle Islands Beyond 5 NM from Mainland. * WHEN...Until 9 PM CST Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ BJH Action: Continued Issued At: 2026-02-24 02:53:41 228 WHUS73 KDLH 240853 MWWDLH URGENT - MARINE WEATHER MESSAGE National Weather Service Duluth MN 253 AM CST Tue Feb 24 2026 LSZ140-141-242100- /O.CON.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ /O.CON.KDLH.UP.W.0006.260224T1200Z-260224T1800Z/ Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- 253 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY... ...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING TO NOON CST TODAY... * WHAT...For the Small Craft Advisory, west winds 10 to 20 kt with gusts up to 30 kt and waves 5 to 8 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 and Grand Marais to Taconite Harbor MN. * WHEN...For the Small Craft Advisory, until noon CST Wednesday. For the Heavy Freezing Spray Warning, from 6 AM this morning to noon CST today. * 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. && $$ LSZ142-242100- /O.CON.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ Taconite Harbor to Silver Bay Harbor MN- 253 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY... * WHAT...West winds 10 to 15 kt with gusts up to 30 kt and waves 2 to 5 ft. * WHERE...Taconite Harbor to Silver Bay Harbor MN. * WHEN...Until noon CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ143>146-148-242100- /O.CON.KDLH.SC.Y.0027.260224T0900Z-260225T1500Z/ Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- Duluth MN to Port Wing WI-Port Wing to Sand Island WI- Oak Point to Saxon Harbor WI- 253 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST WEDNESDAY... * WHAT...West winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 5 ft expected. * WHERE...Silver Bay Harbor to Two Harbors MN, Two Harbors to Duluth MN, Duluth MN to Port Wing WI, Port Wing to Sand Island WI and Oak Point to Saxon Harbor WI. * WHEN...Until 9 AM CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ150-242100- /O.CON.KDLH.SC.Y.0027.000000T0000Z-260225T0300Z/ Outer Apostle Islands Beyond 5 NM from Mainland- 253 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CST THIS EVENING... * WHAT...Southwest winds 15 to 20 kt with gusts up to 30 kt and waves 3 to 6 ft. * WHERE...Outer Apostle Islands Beyond 5 NM from Mainland. * WHEN...Until 9 PM CST this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-02-24 09:56:16 169 WHUS73 KDLH 241555 MWWDLH URGENT - MARINE WEATHER MESSAGE National Weather Service Duluth MN 955 AM CST Tue Feb 24 2026 LSZ146-150-250400- /O.EXT.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ /O.NEW.KDLH.UP.W.0007.260225T0300Z-260225T1400Z/ Port Wing to Sand Island WI- Outer Apostle Islands Beyond 5 NM from Mainland- 955 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL NOON CST WEDNESDAY... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 9 PM THIS EVENING TO 8 AM CST WEDNESDAY... * WHAT...For the Small Craft Advisory, west 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 Outer Apostle Islands Beyond 5 NM from Mainland. * WHEN...For the Small Craft Advisory, until noon CST Wednesday. For the Heavy Freezing Spray Warning, from 9 PM this evening to 8 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. && $$ LSZ140-141-250400- /O.CON.KDLH.UP.W.0006.000000T0000Z-260224T1800Z/ /O.CON.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- 955 AM CST Tue Feb 24 2026 ...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY... * WHAT...For the Heavy Freezing Spray Warning, heavy freezing spray at a rate of 2 cm per hour or greater may rapidly accumulate on vessels. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 30 kt and waves 1 to 2 ft. * WHERE...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...For the Heavy Freezing Spray Warning, until noon CST today. For the Small Craft Advisory, until noon CST Wednesday. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare for dangerous accumulation of ice on their vessel. If possible, remain in port, avoid the warning area or conduct mitigation. Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ143-144-250400- /O.EXT.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- 955 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL NOON CST WEDNESDAY... * WHAT...West winds 10 to 20 kt with gusts up to 30 kt and waves 1 to 4 ft. * WHERE...Silver Bay Harbor to Two Harbors MN and Two Harbors to Duluth MN. * WHEN...Until noon CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ145-148-250400- /O.EXT.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ Duluth MN to Port Wing WI-Oak Point to Saxon Harbor WI- 955 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL NOON CST WEDNESDAY... * WHAT...West winds 10 to 20 kt with gusts up to 30 kt and waves 1 to 4 ft. * WHERE...Duluth MN to Port Wing WI and Oak Point to Saxon Harbor WI. * WHEN...Until noon CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ LSZ142-250400- /O.CON.KDLH.SC.Y.0027.000000T0000Z-260225T1800Z/ Taconite Harbor to Silver Bay Harbor MN- 955 AM CST Tue Feb 24 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON CST WEDNESDAY... * WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt and waves up to 3 ft. * WHERE...Taconite Harbor to Silver Bay Harbor MN. * WHEN...Until noon CST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Anyone operating a smaller vessel should avoid navigating in hazardous conditions. && $$ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||