WHUS73 KMQT 190153 MWWMQT URGENT - MARINE WEATHER MESSAGE National Weather Service Marquette MI 953 PM EDT Mon May 18 2026 LSZ246-247-191400- /O.EXT.KMQT.MF.Y.0012.260519T0200Z-260519T1200Z/ /O.EXB.KMQT.SC.Y.0086.260519T1800Z-260520T0000Z/ Point Isabelle to Lower Entrance of Portage Canal MI- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TO 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, west to northwest winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Point Isabelle to Lower Entrance of Portage Canal MI and Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays. * WHEN...For the Dense Fog Advisory, until 8 AM EDT Tuesday. For the Small Craft Advisory, from 2 PM to 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. && $$ LSZ245-191400- /O.EXT.KMQT.MF.Y.0012.260519T0200Z-260519T1200Z/ /O.CON.KMQT.SC.Y.0086.260519T1500Z-260520T0000Z/ Manitou Island to Point Isabelle MI- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM EDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, northwest winds 15 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Manitou Island to Point Isabelle MI. * WHEN...For the Dense Fog Advisory, until 8 AM EDT Tuesday. For the Small Craft Advisory, from 11 AM to 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ250-251-191400- /O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1200Z/ /O.EXT.KMQT.SC.Y.0086.260519T1100Z-260520T0000Z/ Munising to Grand Marais MI-Grand Marais to Whitefish Point MI- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 7 AM TO 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 to southwest winds 15 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected on Tuesday morning becomes northwest winds 15 to 25 kt with gusts up to 30 kt and waves 5 to 8 ft expected Tuesday afternoon. * WHERE...Munising to Grand Marais MI and Grand Marais to Whitefish Point MI. * WHEN...For the Dense Fog Advisory, until 8 AM EDT Tuesday. For the Small Craft Advisory, from 7 AM to 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. && $$ LSZ241-191400- /O.EXT.KMQT.SC.Y.0086.260519T0700Z-260519T1800Z/ Black River to Ontonagon MI- 953 PM EDT Mon May 18 2026 /853 PM CDT Mon May 18 2026/ ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 3 AM EDT /2 AM CDT/ TO 2 PM EDT /1 PM CDT/ TUESDAY... * WHAT...Northeast winds 10 to 15 kt with gusts up to 20 kt and waves 3 to 5 ft expected late tonight becoming west to northwest winds 10 to 15 kt with gusts up to 20 kt and waves 3 to 5 ft expected Tuesday morning. * WHERE...Black River to Ontonagon MI. * WHEN...From 3 AM EDT /2 AM CDT/ to 2 PM EDT /1 PM CDT/ Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LSZ242-243-191400- /O.EXT.KMQT.SC.Y.0086.260519T1100Z-260519T1800Z/ Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- 953 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 7 AM TO 2 PM EDT TUESDAY... * WHAT...Northwest winds 10 to 15 kt with gusts up to 20 kt and waves 3 to 5 ft expected. * WHERE...Ontonagon to Upper Entrance of Portage Canal MI and Upper Entrance of Portage Canal to Eagle River MI. * WHEN...From 7 AM to 2 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LSZ244-191400- /O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1500Z/ /O.CON.KMQT.SC.Y.0086.260519T0600Z-260520T0000Z/ Eagle River to Manitou Island MI- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 PM EDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, east winds 10 to 15 kt and waves 3 to 4 ft expected late tonight become northwest winds 10 to 20 kt with gusts up to 25 kt and waves 3 to 5 ft expected Tuesday morning. * WHERE...Eagle River to Manitou Island MI. * WHEN...For the Dense Fog Advisory, until 11 AM EDT Tuesday. For the Small Craft Advisory, from 2 AM to 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ248-249-191400- /O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1200Z/ /O.CON.KMQT.SC.Y.0086.260519T1400Z-260520T0000Z/ Huron Islands to Marquette MI-Marquette to Munising MI- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 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, west to northwest winds 15 to 20 kt with gusts up to 30 kt and waves 3 to 6 ft expected. * WHERE...Huron Islands to Marquette MI and Marquette to Munising MI. * WHEN...For the Dense Fog Advisory, until 8 AM EDT Tuesday. For the Small Craft Advisory, from 10 AM to 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. && $$ LMZ248-250-191400- /O.CON.KMQT.MF.Y.0013.000000T0000Z-260519T1700Z/ /O.CON.KMQT.SC.Y.0086.260519T0600Z-260520T0000Z/ Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT TUESDAY... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 PM EDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, south to southwest winds 10 to 20 kt with gusts up to 25 kt and waves 3 to 6 ft expected. * WHERE...Seul Choix Point to Point Detour MI and 5NM East of a line from Fairport MI to Rock Island Passage. * WHEN...For the Dense Fog Advisory, until 1 PM EDT Tuesday. For the Small Craft Advisory, from 2 AM to 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ221-191400- /O.CON.KMQT.MF.Y.0013.000000T0000Z-260519T1700Z/ Green Bay North of line from Cedar River MI to Rock Island Passage- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT TUESDAY... * 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 1 PM EDT Tuesday. * 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. && $$ LSZ264>266-191400- /O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1500Z/ Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT TUESDAY... * WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border, Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore and Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore. * WHEN...Until 11 AM EDT Tuesday. * IMPACTS...Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LSZ267-191400- /O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1800Z/ Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT TUESDAY... * 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 2 PM EDT Tuesday. * 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. && $$ LSZ240-191400- /O.CON.KMQT.SC.Y.0086.260519T0900Z-260519T1800Z/ Saxon Harbor WI to Black River MI- 953 PM EDT Mon May 18 2026 /853 PM CDT Mon May 18 2026/ ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 AM EDT /4 AM CDT/ TO 2 PM EDT /1 PM CDT/ TUESDAY... * WHAT...West to north winds 5 to 10 kt with gusts up to 15 kt and waves 3 to 5 ft expected. * WHERE...Saxon Harbor WI to Black River MI. * WHEN...From 5 AM EDT /4 AM CDT/ to 2 PM EDT /1 PM CDT/ Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ TAP