WHUS73 KMQT 180913 MWWMQT URGENT - MARINE WEATHER MESSAGE National Weather Service Marquette MI 513 AM EDT Mon May 18 2026 LMZ221-181500- /O.CAN.KMQT.SC.Y.0085.000000T0000Z-260519T0000Z/ /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260518T1500Z/ Green Bay North of line from Cedar River MI to Rock Island Passage- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... ...SMALL CRAFT ADVISORY IS CANCELLED... * WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Green Bay North of line from Cedar River MI to Rock Island Passage. * WHEN...Until 11 AM EDT this morning. * IMPACTS...Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ249-181015- /O.CAN.KMQT.SC.Y.0085.000000T0000Z-260518T1200Z/ Marquette to Munising MI- 513 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... Winds and waves are expected to stay below small craft advisory criteria. $$ LSZ250-251-181015- /O.CAN.KMQT.SC.Y.0085.000000T0000Z-260518T1500Z/ Munising to Grand Marais MI-Grand Marais to Whitefish Point MI- 513 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... Winds and waves are expected to stay below small craft advisory criteria. $$ LSZ244-182100- /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260518T2100Z/ /O.CON.KMQT.SC.Y.0085.000000T0000Z-260518T1800Z/ Eagle River to Manitou Island MI- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, south winds 5 to 15 kt with gusts up to 25 kt and waves 2 to 5 ft occurring. * WHERE...Eagle River to Manitou Island MI. * WHEN...For the Dense Fog Advisory, until 5 PM EDT this afternoon. For the Small Craft Advisory, until 2 PM EDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ245-181800- /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260518T1300Z/ /O.CON.KMQT.SC.Y.0085.000000T0000Z-260518T1800Z/ Manitou Island to Point Isabelle MI- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, south winds 5 to 15 kt with gusts up to 25 kt and waves 3 to 6 ft occurring. * WHERE...Manitou Island to Point Isabelle MI. * WHEN...For the Dense Fog Advisory, until 9 AM EDT this morning. For the Small Craft Advisory, until 2 PM EDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ246-181500- /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260518T1300Z/ /O.CON.KMQT.SC.Y.0085.000000T0000Z-260518T1500Z/ Point Isabelle to Lower Entrance of Portage Canal MI- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT THIS MORNING... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, southeast winds 5 to 15 kt with gusts up to 20 kt and waves 3 to 6 ft occurring. * WHERE...Point Isabelle to Lower Entrance of Portage Canal MI. * WHEN...For the Dense Fog Advisory, until 9 AM EDT this morning. For the Small Craft Advisory, until 11 AM EDT this morning. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ248-250-182115- /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260518T1500Z/ /O.EXT.KMQT.SC.Y.0085.000000T0000Z-260520T0000Z/ Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, south winds 15 to 25 kt with gusts up to 30 kt and waves 5 to 8 ft occurring. * WHERE...Seul Choix Point to Point Detour MI and 5NM East of a line from Fairport MI to Rock Island Passage. * WHEN...For the Dense Fog Advisory, until 11 AM EDT this morning. For the Small Craft Advisory, until 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ264>266-182100- /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260518T2100Z/ Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... * WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border, Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore and Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore. * WHEN...Until 5 PM EDT this afternoon. * IMPACTS...Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ267-182115- /O.NEW.KMQT.MF.Y.0011.260518T0913Z-260519T0000Z/ Lake Superior from Grand Marais MI to Whitefish PointMI 5NM off shore to the US/Canadian border- 513 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ247-181500- /O.CON.KMQT.SC.Y.0085.000000T0000Z-260518T1500Z/ Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 513 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT THIS MORNING... * WHAT...Southeast winds 5 to 10 kt with gusts up to 20 kt and waves 2 to 5 ft occurring. * WHERE...Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays. * WHEN...Until 11 AM EDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LSZ248-181200- /O.CON.KMQT.SC.Y.0085.000000T0000Z-260518T1200Z/ Huron Islands to Marquette MI- 513 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Southeast winds 10 to 15 kt with gusts up to 20 kt and waves 3 to 5 ft occurring. * WHERE...Huron Islands to Marquette MI. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$