278 FZUS63 KDTX 180714 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 314 AM 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...A warm front lifts across Lake Huron this morning, with southerly flow expanding across all of the local waters. Strong to severe thunderstorms are possible this afternoon- evening and again Tuesday as a cold front sweeps across the region. High pressure, 30.50 inches, then builds in mid-week. LCZ460-181515- Lake St Clair- 314 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH THIS EVENING... .TODAY...South winds 10 to 15 knots increasing to 20 to 25 knots. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. .TONIGHT...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Mostly cloudy with a chance of showers and thunderstorms in the evening...then partly cloudy with a chance of light showers after midnight. Waves 1 to 3 feet. .TUESDAY...South winds 15 to 20 knots becoming southwest 20 to 25 knots with gusts to 30 knots in the late morning and afternoon. Partly sunny. A chance of light showers in the late morning and early afternoon. Light showers likely and a chance of thunderstorms early in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .TUESDAY NIGHT...West winds 15 to 20 knots veering to the northwest after midnight. Partly cloudy early in the evening becoming mostly cloudy. Light showers likely and a chance of thunderstorms ...then a chance of light showers after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .WEDNESDAY...North winds 15 to 20 knots diminishing to 10 to 15 knots in the afternoon...then becoming northeast 15 to 20 knots in the evening. Partly cloudy. Waves 2 feet or less. .THURSDAY...Northeast winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. .FRIDAY...East winds 15 to 20 knots. Partly cloudy. A chance of showers. Waves 2 feet or less. $$ MR Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes  299 FZUS63 KDTX 180715 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 315 AM 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...A warm front lifts across Lake Huron this morning, with southerly flow expanding across all of the local waters. Strong to severe thunderstorms are possible this afternoon- evening and again Tuesday as a cold front sweeps across the region. High pressure, 30.50 inches, then builds in mid-week. LHZ361-181515- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 315 AM EDT Mon May 18 2026 .TODAY...Southeast winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. A chance of showers and thunderstorms in the afternoon. Waves 3 to 5 feet. .TONIGHT...South winds 5 to 10 knots backing to the southeast in the late evening and overnight. A chance of showers and thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. .TUESDAY...South winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and early afternoon...then veering to the southwest early in the afternoon. Showers likely and a chance of thunderstorms in the morning...then showers in the afternoon. Waves 3 to 5 feet building to 5 to 7 feet early in the afternoon. Waves occasionally around 10 feet. .TUESDAY NIGHT...Northwest winds 20 to 25 knots. Gusts to 30 knots in the late evening and overnight. Waves 6 to 9 feet. Waves occasionally around 12 feet. .WEDNESDAY...Northwest winds 20 to 25 knots with gusts to around 30 knots becoming north 5 to 10 knots. Waves 6 to 9 feet subsiding to 3 to 5 feet late in the afternoon. Waves occasionally around 12 feet. .THURSDAY...Light and variable winds becoming east 5 to 10 knots . Waves 2 feet or less. .FRIDAY...Southeast winds 5 to 10 knots becoming east 10 to 15 knots. Waves 1 to 3 feet. $$ LHZ362-363-181515- 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- 315 AM EDT Mon May 18 2026 .TODAY...South winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. A chance of showers and thunderstorms in the afternoon. Waves 4 to 6 feet. .TONIGHT...South winds 15 to 20 knots decreasing to 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 4 to 6 feet. Waves occasionally around 8 feet. .TUESDAY...South winds 15 to 20 knots increasing to 20 to 25 knots in the late morning and afternoon. A chance of showers in the afternoon. Waves 5 to 7 feet building to 6 to 9 feet early in the afternoon. Waves occasionally around 12 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots veering to the northwest in the late evening and overnight. A chance of showers in the evening. Waves 8 to 12 feet. Waves occasionally around 15 feet. .WEDNESDAY...Northwest winds 15 to 20 knots veering to the north late in the afternoon...then decreasing to 10 to 15 knots late in the evening. Waves 6 to 9 feet subsiding to 3 to 5 feet late in the evening. Waves occasionally around 12 feet. .THURSDAY...North winds 5 to 10 knots veering to the northeast by midnight. Waves 1 to 3 feet. .FRIDAY...East winds 5 to 10 knots increasing to 10 to 15 knots. Waves 2 feet or less. $$ LHZ462>464-181515- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 315 AM EDT Mon May 18 2026 .TODAY...South winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. Waves 3 to 5 feet. .TONIGHT...South winds 10 to 15 knots. Showers likely and a chance of thunderstorms in the evening...then a chance of showers after midnight. Waves 3 to 5 feet. .TUESDAY...South winds 15 to 20 knots. A chance of showers and thunderstorms in the afternoon. Waves 3 to 5 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots. A chance of showers and thunderstorms in the evening. Waves 4 to 6 feet. Waves occasionally around 8 feet. .WEDNESDAY...North winds 10 to 15 knots. Waves 3 to 5 feet. .THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .FRIDAY...East winds 5 to 10 knots increasing to 10 to 15 knots . Waves 2 feet or less. $$ LHZ461-181515- MAFOR 1809/ HURON NORTH 11300 11310 11420 11426 12416 12410. A chance of thunderstorms this afternoon and evening. Waves 3 to 5 feet. HURON SOUTH 14410 11419 11416 12410. Waves 2 to 4 feet today. Waves 3 to 5 feet subsiding to 1 to 3 feet tonight. $$ MR 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)  490 FZUS61 KCLE 180743 GLFLE Open Lake Forecast for Lake Erie National Weather Service Cleveland OH 343 AM 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... Southerly flow continues across the region through Tuesday. Low pressure 29.70 inches tracks through the northern Great Lakes on Tuesday, pulling a cold front southeast across Lake Erie late Tuesday night and early Wednesday morning. High pressure 30.40 inches builds into the Great Lakes Wednesday and Thursday, exiting to the east across New England on Friday. LEZ162>164-181415- 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- The Islands to Vermilion OH beyond 5 nm off shoreline to US- Canadian border- 343 AM EDT Mon May 18 2026 .TODAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots. A slight chance of showers and thunderstorms late. Waves 1 to 3 feet. .TONIGHT...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of showers and thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Waves 1 to 3 feet. .TUESDAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots. Showers and thunderstorms likely in the afternoon. 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 thunderstorms likely in the evening, then showers overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet. .WEDNESDAY...North winds 10 to 15 knots becoming northeast 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 becoming southeast 10 to 15 knots. A chance of showers during the day, then showers likely Friday night. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LEZ165>168-181415- 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- 343 AM EDT Mon May 18 2026 .TODAY...South winds 10 to 15 knots becoming southwest. Waves 1 to 3 feet. .TONIGHT...Southwest winds 10 to 15 knots. A chance of showers and thunderstorms late in the evening. A chance of showers with a slight chance of 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 and thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west 10 to 15 knots. Showers with thunderstorms likely in the evening, then showers overnight. Waves 2 to 4 feet. .WEDNESDAY...North winds 5 to 15 knots becoming northeast 15 to 20 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming east. Waves 1 to 3 feet. .FRIDAY...East winds 10 to 15 knots becoming southeast. A chance of showers during the day, then showers likely Friday night. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LEZ061-169-181415- Ripley to Buffalo NY extending from 5NM off shoreline to US- Canadian border- Conneaut OH to Ripley NY beyond 5 nm off shoreline to US- Canadian border- 343 AM EDT Mon May 18 2026 .TODAY...South winds 5 to 15 knots becoming southwest. Waves 1 to 2 feet. .TONIGHT...Southwest winds 5 to 10 knots. A slight chance of showers and thunderstorms late in the evening. A chance of showers with a slight chance of thunderstorms after midnight. Waves 1 to 2 feet. .TUESDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers with thunderstorms likely in the evening, then showers overnight. Waves 2 to 3 feet. .WEDNESDAY...Northwest winds 5 to 15 knots becoming north. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming east. Waves 2 feet or less. .FRIDAY...East winds 5 to 15 knots becoming southeast. A chance of showers during the day, then showers likely Friday night. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LEZ161-181415- MAFOR 1809/ ERIE WEST 1/3 13410 14510 11510. A chance of showers and thunderstorms this evening, then a chance of showers overnight. Waves 1 to 3 feet. ERIE CENTRAL 1/3 12410 14510 11510 11500. A chance of showers tonight. Waves 1 to 3 feet. ERIE EAST 1/3 12410 11510 14500 11500. A chance of showers overnight. Waves 1 to 2 feet. $$