590 WHUS73 KGRR 180801 MWWGRR URGENT - MARINE WEATHER MESSAGE National Weather Service Grand Rapids MI 401 AM EDT Mon May 18 2026 LMZ844-845-181615- /O.NEW.KGRR.SC.Y.0035.260519T0600Z-260520T0000Z/ St Joseph to South Haven MI-South Haven to Holland MI- 401 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM TO 8 PM EDT TUESDAY... * WHAT...Southwest winds 15 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. && $$ LMZ846>849-181615- /O.EXT.KGRR.SC.Y.0034.000000T0000Z-260520T0000Z/ Holland to Grand Haven MI-Grand Haven to Whitehall MI- Whitehall to Pentwater MI-Pentwater to Manistee MI- 401 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT TUESDAY... * WHAT...South winds 15 to 30 knots and waves 5 to 8 feet. * WHERE...Holland to Manistee. * WHEN...Until 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$  835 WHUS73 KMKX 180815 MWWMKX URGENT - MARINE WEATHER MESSAGE National Weather Service Milwaukee/Sullivan WI 315 AM CDT Mon May 18 2026 LMZ643-181615- /O.EXP.KMKX.MF.Y.0005.000000T0000Z-260518T0800Z/ /O.NEW.KMKX.SC.Y.0054.260518T0815Z-260520T0000Z/ Sheboygan to Port Washington WI- 315 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT TUESDAY... ...DENSE FOG ADVISORY HAS EXPIRED... * WHAT...South winds 10 to 20 kt with gusts up to 25 kt and waves 4 to 6 ft. * WHERE...Nearshore Waters from Sheboygan to Port Washington. * WHEN...Until 7 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. && $$ LMZ644-181615- /O.EXP.KMKX.MF.Y.0005.000000T0000Z-260518T0800Z/ /O.NEW.KMKX.SC.Y.0054.260519T0900Z-260519T2100Z/ Port Washington to North Point Light WI- 315 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM TO 4 PM CDT TUESDAY... ...DENSE FOG ADVISORY HAS EXPIRED... * WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt expected. * WHERE...Nearshore Waters from Port Washington to North Point Lighthouse. * WHEN...From 4 AM to 4 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ645-646-181615- /O.NEW.KMKX.SC.Y.0054.260519T0900Z-260519T2100Z/ North Point Light to Wind Point WI- Wind Point WI to Winthrop Harbor IL- 315 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM TO 4 PM CDT TUESDAY... * WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt expected. * WHERE...Nearshore Waters from North Point Lighthouse to Winthrop Harbor IL. * WHEN...From 4 AM to 4 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. && $$  127 WHUS71 KLWX 180823 MWWLWX URGENT - MARINE WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 423 AM EDT Mon May 18 2026 ANZ531>534-537>543-181630- /O.CON.KLWX.SC.Y.0086.260518T1900Z-260519T0600Z/ Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island- 423 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO 2 AM EDT TUESDAY... * WHAT...South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE...Chesapeake Bay from Smith Point VA to Pooles Island MD and adjoining estuaries, and Tidal Potomac from Cobb Island MD to Smith Point VA. * WHEN...From 3 PM Monday to 2 AM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$  488 WHUS76 KPQR 180831 MWWPQR URGENT - MARINE WEATHER MESSAGE National Weather Service Portland OR 131 AM PDT Mon May 18 2026 PZZ253-190045- /O.CAN.KPQR.SC.Y.0056.000000T0000Z-260518T1000Z/ /O.NEW.KPQR.SC.Y.0058.260518T2100Z-260519T0600Z/ Coastal waters from Cape Foulweather to Florence OR out 10 NM- 131 AM PDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 11 PM PDT THIS EVENING... * WHAT...Seas 6 to 8 ft at 16 seconds and north winds 15 to 20 kt with gusts up to 25 kt expected. * WHERE...Coastal waters from Cape Foulweather to Florence OR out 10 NM. * WHEN...From 2 PM this afternoon to 11 PM PDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PZZ273-180945- /O.CAN.KPQR.SC.Y.0056.000000T0000Z-260518T1000Z/ Waters from Cape Foulweather to Florence OR from 10 to 60 NM- 131 AM PDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... $$ PZZ210-190045- /O.CON.KPQR.SC.Y.0057.260518T1100Z-260518T1500Z/ /O.NEW.KPQR.SC.Y.0059.260519T1200Z-260519T1600Z/ Columbia River Bar- 131 AM PDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM TO 9 AM PDT TUESDAY... * WHAT...Rough bar conditions expected. * WHERE...In the Main Channel of the Columbia River Bar. * WHEN...Small Craft Advisory, until 8 AM PDT this morning. Small Craft Advisory, from 5 AM to 9 AM PDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft, especially when operating near to, or attempting to cross, the Columbia River Bar. * ADDITIONAL DETAILS...Very strong ebb current of 7.32 kt at 613 AM Monday. Seas 8 ft. Ebb current of 3.6 kt at 653 PM Monday. Seas 8 ft. Very strong ebb current of 7.02 kt at 703 AM Tuesday. Seas 10 ft. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wave conditions are expected to be hazardous to small craft in the vicinity of the Columbia River Bar. Mariners are advised to obtain the latest bar conditions from the United States Coast Guard before attempting to cross the bar. && $$ For more information from the National Weather Service, visit: https://www.weather.gov/portland/marine  921 WHUS76 KSEW 180840 MWWSEW URGENT - MARINE WEATHER MESSAGE National Weather Service Seattle WA 140 AM PDT Mon May 18 2026 PZZ131-132-181645- /O.CON.KSEW.SC.Y.0062.000000T0000Z-260518T1200Z/ /O.NEW.KSEW.SC.Y.0063.260518T2100Z-260519T1200Z/ Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca- 140 AM PDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING... ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 5 AM PDT TUESDAY... * WHAT...For the first Small Craft Advisory, west winds 20 to 30 kt. For the second Small Craft Advisory, west winds 20 to 25 kt. * WHERE...Central U. S. Waters Strait Of Juan De Fuca and East Entrance U. S. Waters Strait Of Juan De Fuca. * WHEN...For the first Small Craft Advisory, until 5 AM PDT early this morning. For the second Small Craft Advisory, from 2 PM this afternoon to 5 AM PDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 21 to 33 knots and/or seas 10 feet or higher are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels should avoid navigating in these conditions. && $$ For more information from the National Weather Service visit http://weather.gov/seattle  188 WHUS73 KGRB 180845 MWWGRB URGENT - MARINE WEATHER MESSAGE National Weather Service Green Bay WI 345 AM CDT Mon May 18 2026 LMZ521-522-181645- /O.CAN.KGRB.SC.Y.0052.000000T0000Z-260519T0000Z/ /O.CON.KGRB.MF.Y.0006.000000T0000Z-260518T1400Z/ /O.NEW.KGRB.SC.Y.0053.260519T1500Z-260520T0000Z/ Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 345 AM CDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than 1 NM. For the Small Craft Advisory, west winds 15 to 20 kts with gusts up to 25 kts and waves 2 to 4 ft expected. * WHERE...Central and Southern Bay of Green Bay. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM to 7 PM CDT 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. && $$ LMZ543-181645- /O.CAN.KGRB.MF.Y.0006.000000T0000Z-260518T1400Z/ /O.CON.KGRB.SC.Y.0052.000000T0000Z-260520T0600Z/ Two Rivers to Sheboygan WI- 345 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT WEDNESDAY... ...DENSE FOG ADVISORY IS CANCELLED... * WHAT...South winds 10 to 20 kts with gusts to 25 kts veering west on Tuesday. Waves 3 to 5 ft increasing to 4 to 7 ft late tonight into Tuesday. * WHERE...Lake Michigan nearshore waters from Two Rivers to Sheboygan. * WHEN...Until 1 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ541-542-181645- /O.CON.KGRB.MF.Y.0006.000000T0000Z-260518T1400Z/ /O.CON.KGRB.SC.Y.0052.000000T0000Z-260520T0600Z/ Rock Island Passage to Sturgeon Bay WI- Sturgeon Bay to Two Rivers WI- 345 AM CDT Mon May 18 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 AM CDT WEDNESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to 1 NM or less. For the Small Craft Advisory, south winds 10 to 20 kts with gusts to 25 kts veering west on Tuesday. Waves 3 to 5 ft increasing to 4 to 7 ft late tonight into Tuesday. * WHERE...Lake Michigan nearshore waters from Washington Island to Two Rivers. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, until 1 AM CDT Wednesday. * 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. && $$ Kieckbusch  654 WHUS73 KLOT 180855 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 355 AM CDT Mon May 18 2026 LMZ740>745-181000- /O.EXP.KLOT.SC.Y.0058.000000T0000Z-260518T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 355 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 4 AM CDT EARLY THIS MORNING... Winds have diminished below advisory criteria. Therefore the Small Craft Advisory has been allowed to expire. $$