529 FZUS63 KDTX 181920 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 320 PM EDT Mon May 18 2026 For waters beyond five nautical miles off shore on Lake Huron Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...Strong to severe thunderstorms are likely this afternoon-evening and again possible Tuesday as a cold front sweeps across the region. High pressure, 30.50 inches, then builds in mid-week. LHZ361-190330- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 320 PM EDT Mon May 18 2026 ...SEVERE THUNDERSTORM WATCH 221 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...Southeast winds 5 to 10 knots backing to the east by midnight...then veering to the south early in the morning. A chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .TUESDAY...Southeast winds 10 to 15 knots becoming south 15 to 20 knots in the late morning and early afternoon...then veering to the southwest late in the afternoon. A chance of showers. Waves 3 to 5 feet building to 4 to 6 feet late in the afternoon. Waves occasionally around 8 feet. .TUESDAY NIGHT...West winds 15 to 20 knots becoming northwest 20 to 25 knots with gusts to around 30 knots in the late evening and overnight. A chance of showers in the evening. Waves 6 to 9 feet. Waves occasionally around 12 feet. .WEDNESDAY...Northwest winds 20 to 25 knots with gusts to around 30 knots decreasing to 15 to 20 knots in the late morning and afternoon. Waves 5 to 7 feet. Waves occasionally around 10 feet. .WEDNESDAY NIGHT...Northwest winds 15 to 20 knots decreasing to 5 to 10 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. .THURSDAY...Light and variable winds becoming east 5 to 10 knots late in the morning...then becoming light and variable late in the evening. Waves 2 feet or less. .FRIDAY...East winds 5 to 10 knots increasing to 15 to 20 knots. A chance of. Waves 2 feet or less building to 2 to 4 feet. .SATURDAY...East winds 20 to 25 knots decreasing to 10 to 15 knots. A chance of showers. Waves 2 to 4 feet. $$ LHZ362-363-190330- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 320 PM EDT Mon May 18 2026 ...SEVERE THUNDERSTORM WATCH 221 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...South winds 10 to 15 knots increasing to 15 to 20 knots early in the morning. A chance of showers and thunderstorms in the evening...then a chance of showers after midnight. Waves 4 to 6 feet. Waves occasionally around 8 feet. .TUESDAY...South winds 15 to 20 knots increasing to 20 to 25 knots early in the afternoon...then decreasing to 15 to 20 knots late in the afternoon. A chance of showers. Waves 4 to 6 feet building to 6 to 9 feet in the afternoon. Waves occasionally around 12 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots veering to the northwest with gusts to around 30 knots in the late evening and overnight. A chance of showers in the evening. Waves 6 to 9 feet. Waves occasionally around 12 feet. .WEDNESDAY...Northwest winds 20 to 25 knots with gusts to around 30 knots decreasing to 15 to 20 knots in the late morning and afternoon. Waves 6 to 9 feet. Waves occasionally around 12 feet. .WEDNESDAY NIGHT...North winds 15 to 20 knots becoming northwest 10 to 15 knots after midnight. Waves 4 to 6 feet. Waves occasionally around 8 feet. .THURSDAY...Northeast winds 5 to 10 knots becoming light and variable...then becoming northeast 5 to 10 knots late in the evening. Waves 1 to 3 feet. .FRIDAY...East winds 5 to 10 knots increasing to 15 to 20 knots. Waves1 to 3 feet building to 2 to 4 feet by midnight. .SATURDAY...East winds 15 to 20 knots decreasing to 10 to 15 knots . A chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet by midnight. $$ LHZ462>464-190330- 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- 320 PM EDT Mon May 18 2026 ...SEVERE THUNDERSTORM WATCH 221 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...South winds 10 to 15 knots. Showers likely and a chance of thunderstorms in the evening...then a chance of showers after midnight. Waves 3 to 5 feet. .TUESDAY...South winds 15 to 20 knots. A chance of showers in the morning...then a chance of showers and thunderstorms in the afternoon. Waves 3 to 5 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west 10 to 15 knots in the late evening and overnight. A chance of showers and thunderstorms in the evening...then a chance of showers after midnight. Waves 3 to 5 feet. .WEDNESDAY...North winds 10 to 15 knots. Waves 4 to 6 feet. Waves occasionally around 8 feet. .WEDNESDAY NIGHT...North winds 10 to 15 knots. Waves 3 to 5 feet. .THURSDAY...Northeast winds 5 to 10 knots becoming north 10 to 15 knots late in the afternoon...then becoming northeast 5 to 10 knots late in the evening. Waves 2 to 4 feet subsiding to 1 to 3 feet. .FRIDAY...East winds 5 to 10 knots increasing to 15 to 20 knots. A chance of showers by midnight. Waves 1 to 3 feet building to 2 to 4 feet by midnight. .SATURDAY...East winds 15 to 20 knots decreasing to 10 to 15 knots. A chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LHZ461-190330- MAFOR 1821/ HURON NORTH...Severe Thunderstorm Watch in effect...12416 13410 12420 11520. A chance of thunderstorms tonight. Waves 3 to 5 feet tonight. Waves 3 to 5 feet building to 5 to 7 feet. Occasional wave height around 10 feet Tuesday. HURON SOUTH...Severe Thunderstorm Watch in effect...11516 11416 13410 12420 11520. A chance of thunderstorms this evening. Waves 2 to 4 feet tonight. Waves 3 to 5 feet Tuesday. $$ AM Experimental modernized open lake forecast is available online at weather.gov/dtx/glftable (all lower case) Graphical marine forecasts are available online at weather.gov/greatlakes (all lower case)  543 FZUS63 KDTX 181920 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 320 PM EDT Mon May 18 2026 Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...Strong to severe thunderstorms are likely this afternoon-evening and again possible Tuesday as a cold front sweeps across the region. High pressure, 30.50 inches, then builds in mid-week. LCZ460-190330- Lake St Clair- 320 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 221 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Mostly cloudy becoming partly cloudy after midnight becoming mostly cloudy. Light showers likely early in the evening. A chance of thunderstorms in the evening. A chance of light showers in the late evening and overnight. Waves 1 to 3 feet. .TUESDAY...Southwest winds 15 to 20 knots increasing to 20 to 25 knots with gusts to 30 knots in the afternoon. Mostly cloudy early in the morning becoming partly sunny. A chance of light showers early in the morning. Light showers likely and a chance of thunderstorms late in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet in the afternoon. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west 10 to 15 knots by midnight...then becoming north 15 to 20 knots after midnight. Mostly cloudy. Showers likely early in the evening. A chance of thunderstorms. A chance of light showers in the late evening and overnight. Waves 1 to 3 feet. .WEDNESDAY...North winds 15 to 20 knots diminishing to 10 to 15 knots in the late morning and afternoon. Partly sunny. A chance of light showers early in the morning. Waves 2 feet or less. .WEDNESDAY NIGHT...Northeast winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Partly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots in the afternoon...then increasing to 10 to 15 knots in the evening. Mostly sunny becoming partly cloudy. Waves 2 feet or less. .FRIDAY...East winds 20 to 25 knots. Mostly cloudy. Showers likely. Waves 1 to 3 feet. .SATURDAY...East winds 20 to 25 knots. Mostly cloudy with showers likely. Waves 2 feet or less. $$ AM Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes  466 FZUS61 KCLE 181939 GLFLE Open Lake Forecast for Lake Erie National Weather Service Cleveland OH 339 PM EDT Mon May 18 2026 For waters beyond five nautical miles of shore on Lake Erie Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS... Pressure will fall tonight and Tuesday ahead of a cold front late Tuesday into early Tuesday night. A ridge averaging 30.30 inches will build in Wednesday holding through Thursday night. A trough averaging 30.30 inches moves in for the weekend. LEZ164-190215- The Islands to Vermilion OH beyond 5 nm off shoreline to US- Canadian border- 339 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 10 to 15 knots. Showers likely with a chance of thunderstorms this evening, then a slight chance of showers and thunderstorms after midnight. Waves 1 to 3 feet. .TUESDAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots. A chance of showers early, then a chance of showers with a slight chance of thunderstorms late in the morning. A chance of showers and thunderstorms late. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming northwest 10 to 15 knots. Showers with a chance of thunderstorms. Waves 2 to 3 feet. .WEDNESDAY...Northeast winds 10 to 15 knots. Showers likely in the morning. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots increasing to 15 to 20 knots. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming east 15 to 20 knots. Waves 2 to 3 feet. .FRIDAY...East winds 15 to 20 knots becoming southeast. Showers likely during the day, then showers Friday night. Waves 1 to 3 feet. .SATURDAY...Southeast winds 5 to 15 knots becoming south. Showers likely with a chance of thunderstorms during the day, then a chance of showers Saturday night. Waves 1 to 2 feet. Winds and waves higher in and near thunderstorms. $$ LEZ162-163-190215- Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border- Reno Beach to The Islands OH beyond 5NM off shoreline to US- Canadian border- 339 PM EDT Mon May 18 2026 ...SEVERE THUNDERSTORM WATCH 223 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .TONIGHT...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of showers and thunderstorms this evening, then a chance of showers with a slight chance of thunderstorms after midnight. Waves 1 to 3 feet. .TUESDAY...South winds 15 to 20 knots becoming southwest. A chance of showers with a slight chance of thunderstorms early, then a slight chance of showers and thunderstorms. A chance of showers and thunderstorms late. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming northwest 10 to 15 knots. Showers with a chance of thunderstorms. Waves 1 to 3 feet. .WEDNESDAY...North winds 5 to 15 knots becoming northeast. A chance of showers in the morning. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots increasing to 15 to 20 knots. Waves 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming east. Waves 1 to 3 feet. .FRIDAY...East winds 15 to 20 knots. A chance of showers during the day, then showers Friday night. Waves 2 to 4 feet subsiding to 1 to 3 feet. .SATURDAY...Southeast winds 15 to 20 knots diminishing to 5 to 15 knots. A chance of showers and thunderstorms during the day, then a chance of showers Saturday night. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LEZ165>168-190215- Vermilion to Avon Point OH beyond 5 nm off shoreline to US- Canadian border- Avon Point to Willowick OH beyond 5 nm off shoreline to US- Canadian border-Willowick to Geneva-on-the- Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on- the-Lake to Conneaut OH beyond 5 nm off shoreline to US- Canadian border- 339 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 10 to 15 knots becoming south. A chance of showers and thunderstorms this evening, then a slight chance of showers and thunderstorms after midnight. A slight chance of showers late. Waves 1 to 3 feet. .TUESDAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots. A chance of showers early, then a slight chance of showers late in the morning. A slight chance of showers and thunderstorms late. Waves 1 to 3 feet building to 2 to 4 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming northwest 10 to 15 knots. Showers with a chance of thunderstorms. Waves 2 to 4 feet. .WEDNESDAY...North winds 10 to 15 knots. Showers likely in the morning. Waves 1 to 3 feet. .WEDNESDAY NIGHT...North winds 10 to 15 knots becoming northeast. Waves 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming east. Waves 2 to 4 feet. .FRIDAY...East winds 15 to 20 knots. A chance of showers during the day, then showers Friday night. Waves 2 to 4 feet subsiding to 1 to 3 feet. .SATURDAY...Southeast winds 15 to 20 knots becoming south 5 to 15 knots. Showers likely during the day, then a chance of showers Saturday night. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LEZ061-169-190215- Ripley to Buffalo NY extending from 5NM off shoreline to US- Canadian border- Conneaut OH to Ripley NY beyond 5 nm off shoreline to US- Canadian border- 339 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 5 to 10 knots. A slight chance of showers and thunderstorms from late evening on. Waves 1 to 2 feet. .TUESDAY...Southwest winds 10 to 15 knots. A chance of showers early, then a slight chance of showers late in the morning. Waves 1 to 2 feet. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers with a chance of thunderstorms. Waves 2 to 3 feet. .WEDNESDAY...Northwest winds 5 to 10 knots becoming west. Showers likely in the morning. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming northeast. Waves 1 to 2 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming east. Waves 2 feet or less. .FRIDAY...East winds 10 to 15 knots. A chance of showers during the day, then showers likely Friday night. Waves 2 feet or less. .SATURDAY...East winds 5 to 15 knots becoming southeast. Showers likely. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LEZ161-190215- MAFOR 1821/ ERIE WEST 1/3...SEVERE THUNDERSTORM WATCH IN EFFECT...11520 13510 11410 13520. A chance of showers and thunderstorms this evening. A chance of showers Tuesday morning, then a chance of showers and thunderstorms Tuesday afternoon. Waves 1 to 3 feet. ERIE CENTRAL 1/3 13510 12410 11510 12520. A chance of showers and thunderstorms this evening. A chance of showers Tuesday morning. Waves 1 to 3 feet tonight. Waves 1 to 3 feet building to 2 to 4 feet Tuesday. ERIE EAST 1/3 14500 11500 13510. Waves 1 to 2 feet. $$  230 FZUS63 KMKX 181952 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 252 PM CDT Mon May 18 2026 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan. Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered. .SYNOPSIS... Storms and showers are pushing out as winds behind this remain breezy from the south. These winds will increase slightly across the lake late tonight and remain breezy ahead of the cold frontal passage expected Tuesday afternoon as the low pressure system around 29.6 inches swings northeast of the Lake into Ontario. A few storms chances across primarily the south part of the lake late tonight into Tuesday morning ahead of the front. High pressure around 30.4 inches will push in behind the front with light and variable winds taking hold from late Wednesday into Thursday. LMZ261-362-364-366-563-565-567-868-190330- Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and north of a line from Charlevoix MI to South Fox Island 5 NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to Mid Lake- Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI- Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid Lake- 252 PM CDT Mon May 18 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .TONIGHT...South winds 10 to 20 kt increasing to 30 kt. Patchy fog this evening, then areas of dense fog overnight. Chance of showers and thunderstorms overnight. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. .TUESDAY...South winds to 30 kt becoming west 15 to 25 kt. Patchy fog. Slight chance of showers and thunderstorms in the morning, then chance of showers in the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. .TUESDAY NIGHT...Northwest winds 15 to 25 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft. .WEDNESDAY...North winds 15 to 25 kt. Waves 2 to 4 ft. .WEDNESDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 5 to 10 kt overnight. Waves 1 to 3 ft. .THURSDAY...East winds 5 to 10 kt becoming northeast 10 to 20 kt in the afternoon. Waves 1 to 2 ft. .THURSDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves 1 to 3 ft. .FRIDAY...East winds 10 to 20 kt becoming northeast 15 to 25 kt. Waves 2 to 4 ft. .SATURDAY...Northeast winds 15 to 25 kt. Chance of rain showers. Waves 2 to 4 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-190330- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan fromSt. Joseph to South Haven MI 5 NM offshore to Mid Lake- 252 PM CDT Mon May 18 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .TONIGHT...South winds 10 to 20 kt increasing to 30 kt. Slight chance of showers and thunderstorms this evening, then chance of showers and thunderstorms overnight. Patchy fog overnight. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. .TUESDAY...South winds to 30 kt becoming west 15 to 25 kt. Patchy fog in the morning. Slight chance of showers and thunderstorms in the morning, then chance of showers and slight chance of thunderstorms in the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. .TUESDAY NIGHT...Northwest winds 10 to 20 kt becoming north. Waves 3 to 5 ft. .WEDNESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft. .WEDNESDAY NIGHT...Northeast winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...East winds 10 to 20 kt becoming northeast. Waves 2 to 4 ft. .THURSDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Waves 2 to 4 ft. .FRIDAY...East winds 10 to 20 kt becoming northeast. Chance of showers. Waves 2 to 4 ft. .SATURDAY...Northeast winds 10 to 20 kt becoming north 10 to 15 kt. Waves 1 to 3 ft. $$ LMZ761-190330- MAFOR 1822/ MICHIGAN NORTH 12420 11430 11444 11440 19444 11440 12540. A chance of showers and thunderstorms overnight. A chance of showers Tuesday afternoon. Waves 3 to 5 feet subsiding to 2 to 4 feet, then building to 4 to 7 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet Tuesday. MICHIGAN SOUTH 13430 12440 11430 12530. A chance of showers and thunderstorms overnight. A chance of showers Tuesday afternoon. Waves 2 to 4 feet building to 3 to 6 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet Tuesday. $$ Kuroski Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes