729 WHHW70 PHFO 190127 MWWHFO URGENT - MARINE WEATHER MESSAGE National Weather Service Honolulu HI 327 PM HST Mon May 18 2026 PHZ119>121-123-124-191430- /O.CON.PHFO.SC.Y.0025.000000T0000Z-260520T1600Z/ Maalaea Bay-Pailolo Channel-Alenuihaha Channel- Big Island Leeward Waters-Big Island Southeast Waters- 327 PM HST Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST WEDNESDAY... * WHAT...East winds 15 to 25 kt, except north in Maalaea Bay. * WHERE...Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters and Big Island Southeast Waters. * WHEN...Until 6 AM HST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$  843 WHUS73 KMQT 190153 MWWMQT URGENT - MARINE WEATHER MESSAGE National Weather Service Marquette MI 953 PM EDT Mon May 18 2026 LSZ246-247-191400- /O.EXT.KMQT.MF.Y.0012.260519T0200Z-260519T1200Z/ /O.EXB.KMQT.SC.Y.0086.260519T1800Z-260520T0000Z/ Point Isabelle to Lower Entrance of Portage Canal MI- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 953 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM EDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TO 8 PM EDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than one nautical mile. For the Small Craft Advisory, west to northwest winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Point Isabelle to Lower Entrance of Portage Canal MI and Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays. * WHEN...For the Dense Fog Advisory, until 8 AM EDT Tuesday. For the Small Craft Advisory, from 2 PM to 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ 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. && $$ TAP  062 WHUS73 KDTX 190157 MWWDTX URGENT - MARINE WEATHER MESSAGE National Weather Service Detroit/Pontiac MI 957 PM EDT Mon May 18 2026 LHZ421-422-191415- /O.EXP.KDTX.SC.Y.0031.000000T0000Z-260519T0200Z/ /O.NEW.KDTX.SC.Y.0032.260519T1400Z-260520T0200Z/ Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- 957 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 10 PM EDT TUESDAY... ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM EDT THIS EVENING... * WHAT...Expect sustained winds up to 25 knots from the southwest with gusts up to 32 knots. The largest significant waves will be 5 feet with a potential maximum wave height of 7 feet. * WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay and Inner Saginaw Bay SW of Point Au Gres to Bay Port MI. * WHEN...The maximum winds are expected around 11 AM EDT Tuesday with the largest waves expected around 1 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LHZ441>443-191415- /O.EXP.KDTX.SC.Y.0031.000000T0000Z-260519T0200Z/ /O.NEW.KDTX.SC.Y.0032.260519T1400Z-260520T0200Z/ Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- 957 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 10 PM EDT TUESDAY... ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM EDT THIS EVENING... * WHAT...Expect sustained winds up to 19 knots from the southwest with gusts up to 29 knots. The largest significant waves will be 4 feet with a potential maximum wave height of 5 feet. * WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port Sanilac MI and Port Sanilac to Port Huron MI. * WHEN...The maximum winds are expected around 2 PM EDT Tuesday with the largest waves expected around 3 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. && $$ LCZ460-191415- /O.EXP.KDTX.SC.Y.0031.000000T0000Z-260519T0200Z/ /O.NEW.KDTX.SC.Y.0032.260519T1400Z-260520T0200Z/ Lake St Clair- 957 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 10 PM EDT TUESDAY... ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM EDT THIS EVENING... * WHAT...Expect sustained winds up to 21 knots from the southwest with gusts up to 28 knots. The largest significant waves will be 3 feet with a potential maximum wave height of 4 feet. * WHERE...Lake St Clair. * WHEN...The maximum winds are expected around 2 PM EDT Tuesday with the largest waves expected around 3 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LHZ361>363-462>464-191415- /O.NEW.KDTX.MF.Y.0008.260519T0200Z-260519T2000Z/ Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 957 PM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 4 PM EDT TUESDAY... * WHAT...Dense fog will reduce visibilityto less than 1 NM. * WHERE...Portions of Lake Huron. * WHEN...Until 4 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. && $$ LEZ444-191415- /O.NEW.KDTX.SC.Y.0032.260519T1400Z-260520T0200Z/ Michigan Waters of Lake Erie from Detroit River to North Cape MI- 957 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 10 PM EDT TUESDAY... * WHAT...Expect sustained winds up to 20 knots from the southwest with gusts up to 26 knots. The largest significant waves will be 3 feet with a potential maximum wave height of 4 feet. * WHERE...Michigan Waters of Lake Erie from Detroit River to North Cape MI. * WHEN...The maximum winds are expected around 2 PM EDT Tuesday with the largest waves expected around 3 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$  026 WHUS73 KGRR 190156 MWWGRR URGENT - MARINE WEATHER MESSAGE National Weather Service Grand Rapids MI 956 PM EDT Mon May 18 2026 LMZ846>849-191000- /O.CON.KGRR.SC.Y.0034.000000T0000Z-260520T0000Z/ Holland to Grand Haven MI-Grand Haven to Whitehall MI- Whitehall to Pentwater MI-Pentwater to Manistee MI- 956 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT TUESDAY... * WHAT...South winds 15 to 25 knots with gusts up to 30 knots and waves 3 to 6 feet. * WHERE...Holland to Manistee. * WHEN...Until 8 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. && $$ LMZ844-845-191000- /O.CON.KGRR.SC.Y.0035.260519T0600Z-260520T0000Z/ St Joseph to South Haven MI-South Haven to Holland MI- 956 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 PM EDT TUESDAY... * WHAT...Southwest winds 10 to 20 knots with gusts up to 30 knots and waves 2 to 5 feet expected. * WHERE...St Joseph to Holland. * WHEN...From 2 AM to 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$