185 FZUS63 KMKX 150736 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 236 AM CDT Thu Oct 15 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... Winds will gradually become easterly tonight as high pressure around 30.3 inches slides through the region. The stronger winds are expected across the southern half of the lake during this time. Two areas of low pressure are progged to merge over the Great Lakes region into a single low pressure tonight and deepen to around 29.5 inches as it shifts into the eastern Great Lakes through Friday. Expect a northwesterly wind shift to ramp up and increase to gales and nearing storm force at times on the backside of the departing low pressure while a strong high pressure around 30.7 inches builds to the west. A Gale Warning is now in effect for all of the open waters of Lake Michigan Friday morning into Friday night. Widespread rain is expected this afternoon into tonight, with a few thunderstorms possible over the southern open waters. Lake effect showers & thundershowers may linger into Friday along the back side of departing low pressure. A few waterspouts are possible in the Friday showers/thundershowers, particularly over the southern half of Lake Michigan. As the high sinks toward the Ohio River Valley on Saturday, strong low pressure around 29.1 inches will develop in northern Manitoba. The tight pressure gradient may bring southwest gales to Lake Michigan on Sunday. LMZ261-362-364-366-563-565-567-868-151530- 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- 236 AM CDT Thu Oct 15 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY NIGHT... .TODAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt. Showers this afternoon. Waves 3 to 5 ft. .TONIGHT...East winds 10 to 20 kt diminishing to 10 to 15 kt late in the evening, then becoming northeast 10 to 20 kt after midnight becoming north to 30 kt late. Showers in the evening, then chance of showers overnight. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. .FRIDAY...North winds to 30 kt increasing to gales to 45 kt. Chance of showers. Waves 6 to 9 ft occasionally to 12 ft building to 12 to 16 ft occasionally to 21 ft. .FRIDAY NIGHT...North gales to 40 kt diminishing to 30 kt overnight. Waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to 12 ft occasionally to 16 ft. .SATURDAY...West winds 15 to 25 kt becoming southwest to 30 kt. Waves 4 to 6 ft occasionally to 8 ft. .SATURDAY NIGHT...Southwest winds to 30 kt increasing to gales to 35 kt. Waves 5 to 8 ft occasionally to 10 ft building to 7 to 10 ft occasionally to 13 ft. .SUNDAY...Southwest gales to 40 kt. Waves 8 to 12 ft occasionally to 16 ft. .MONDAY...Southwest winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-151530- 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 from St. Joseph to South Haven MI 5 NM offshore to Mid Lake- 236 AM CDT Thu Oct 15 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY NIGHT... .TODAY...East winds 10 to 20 kt becoming southeast 15 to 25 kt. Showers this afternoon. Waves 4 to 7 ft occasionally to 9 ft. .TONIGHT...Southeast winds 10 to 20 kt increasing to 15 to 25 kt late in the evening, then veering to northwest to 30 kt overnight. Showers in the evening, then slight chance of showers overnight. Waves 4 to 6 ft occasionally to 8 ft building to 7 to 10 ft occasionally to 13 ft. .FRIDAY...Northwest winds to 30 kt increasing to gales to 35 kt late in the morning, then becoming north gales to 40 kt early in the afternoon increasing to gales to 45 kt late. Chance of showers in the morning, then showers in the afternoon. Waves 8 to 11 ft occasionally to 14 ft building to 14 to 18 ft occasionally to 23 ft. .FRIDAY NIGHT...North gales to 45 kt diminishing to 30 kt overnight. Chance of rain showers in the evening. Waves 15 to 20 ft occasionally to 26 ft subsiding to 12 to 16 ft occasionally to 21 ft. .SATURDAY...North winds 10 to 20 kt backing to southwest 15 to 25 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 6 ft occasionally to 8 ft. .SATURDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt. Waves 6 to 9 ft occasionally to 12 ft. .SUNDAY...Southwest winds to 30 kt increasing to gales to 40 kt. Waves 8 to 11 ft occasionally to 14 ft building to 8 to 12 ft occasionally to 16 ft. .MONDAY...Southwest winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. $$ LMZ761-151530- MAFOR 1510/ MICHIGAN NORTH 12310 11320 11326 11226 11216 11126 11846. Waves 1 to 3 feet building to 2 to 4 feet today. Waves 2 to 4 feet building to 3 to 5 feet tonight. MICHIGAN SOUTH 11220 12320 13336 12740. Waves 3 to 6 feet today. Waves 3 to 6 feet building to 6 to 9 feet tonight. $$ Quigley Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes  448 FZUS61 KCLE 150742 GLFLE Open Lake Forecast for Lake Erie National Weather Service Cleveland OH 342 AM EDT Thu Oct 15 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... High pressure 30.10 inches builds off to the east of Lake Erie through the afternoon. A warm front will lift north across the lake late this evening as low pressure 29.60 inches moves into the Great Lakes. A cold front will sweep across the lake early Friday with high pressure 30.50 inches building into the Ohio Valley this weekend. LEZ162-163-151415- 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- 342 AM EDT Thu Oct 15 2026 .TODAY...Northeast winds 10 to 15 knots becoming east. Waves 1 to 3 feet. .TONIGHT...East winds 10 to 15 knots becoming southwest 15 to 20 knots. Showers likely early, then showers with a slight chance of thunderstorms. A chance of showers late. Waves 1 to 2 feet building to 2 to 4 feet. .FRIDAY...West winds to 30 knots becoming northwest. A chance of showers in the morning, then showers likely in the afternoon. Waves 3 to 6 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. Showers likely in the evening. Waves 3 to 6 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .SATURDAY...North winds to 30 knots becoming southwest and diminishing to 5 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet. .SUNDAY...Southwest winds 10 to 15 knots. Waves 1 to 2 feet. .MONDAY...Southwest winds 5 to 15 knots becoming west. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LEZ164>166-151415- The Islands to Vermilion OH beyond 5 nm off shoreline to US- Canadian border- 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- 342 AM EDT Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...East winds 10 to 15 knots becoming southwest and increasing to 15 to 25 knots. A chance of showers early, then showers with a slight chance of thunderstorms from late evening on. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .FRIDAY...Southwest winds to 30 knots becoming northwest. Showers. Waves 5 to 9 feet. Waves occasionally around 11 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. Showers in the evening, then a chance of showers overnight. Waves 6 to 10 feet. Waves occasionally around 13 feet. .SATURDAY...North winds to 30 knots becoming southwest and diminishing to 15 to 20 knots. Waves 6 to 9 feet subsiding to 1 to 3 feet. Waves occasionally around 11 feet. .SUNDAY...Southwest winds 15 to 20 knots. Waves 2 to 4 feet. .MONDAY...Southwest winds 5 to 15 knots becoming west. Waves 1 to 3 feet subsiding to 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LEZ061-167>169-151415- Ripley to Buffalo NY extending from 5NM off shoreline to US- Canadian border-Willowick to Geneva-on-the- Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on- the-Lake to Conneaut OH beyond 5 nm off shoreline to US- Canadian border- Conneaut OH to Ripley NY beyond 5 nm off shoreline to US- Canadian border- 342 AM EDT Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots becoming northeast. Waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...East winds 10 to 15 knots becoming southwest and increasing to 15 to 25 knots. A slight chance of showers early, then a chance of showers with a slight chance of thunderstorms late in the evening. Showers with a slight chance of thunderstorms after midnight. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .FRIDAY...Southwest winds to 30 knots becoming northwest. Showers in the morning, then a chance of showers in the afternoon. Waves 5 to 9 feet. Waves occasionally around 11 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. A chance of showers. Waves 6 to 10 feet. Waves occasionally around 13 feet. .SATURDAY...North winds to 30 knots becoming west and diminishing to 15 to 20 knots. Waves 6 to 9 feet subsiding to 2 to 4 feet. Waves occasionally around 11 feet. .SUNDAY...Southwest winds 15 to 20 knots. Waves 2 to 4 feet. .MONDAY...Southwest winds 5 to 15 knots becoming west. Waves 2 to 4 feet subsiding to 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LEZ161-151415- MAFOR 1509/ ERIE WEST 1/3 13210 11200 11210 11316 11426 11530. Waves 2 to 4 feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet building to 3 to 6 feet tonight. ERIE CENTRAL 1/3 14210 11210 11310 11426 11436. Waves 2 to 4 feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet building to 3 to 6 feet tonight. ERIE EAST 1/3 11110 12210 12110 11310 12426. A chance of thunderstorms overnight. Waves 1 to 3 feet today. Waves 1 to 3 feet building to 3 to 5 feet tonight. $$  428 FZUS63 KDTX 150742 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 342 AM EDT Thu Oct 15 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...High pressure, 30.30 inches, passes across the northern Great Lakes this morning. Low pressure is forecast to strengthen to 29.60 inches as it tracks across the central Great Lakes Thursday night and early Friday. A strong cold front in its wake brings likely northerly gales late Friday. LHZ361-362-151545- 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- 342 AM EDT Thu Oct 15 2026 ...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... .TODAY...East winds 10 to 15 knots. Waves 1 to 3 feet building to 2 to 4 feet in the afternoon. .TONIGHT...Southeast winds 10 to 15 knots backing to the northeast early in the morning. Rain. Waves 2 to 4 feet. .FRIDAY...Northeast winds 10 to 15 knots becoming north 15 to 20 knots with gusts to around 30 knots in the late morning and early afternoon...then increasing to 30 knots with gusts to 35 knot gales early in the afternoon. A chance of rain. Waves 2 to 4 feet building to 6 to 9 feet in the late morning and afternoon. Waves occasionally around 12 feet. .FRIDAY NIGHT...North winds to 30 knots with gusts to 35 knot gales decreasing to 15 to 20 knots. Waves 8 to 12 feet. Waves occasionally around 15 feet. .SATURDAY...Northwest winds 10 to 15 knots backing to the west with gusts to around 30 knots late in the morning...then becoming southwest 15 to 20 knots with gusts to around 30 knots late in the afternoon. Waves 3 to 5 feet. .SUNDAY...Southwest winds 15 to 20 knots with gusts to 35 knot gales. Waves 4 to 6 feet building to 6 to 9 feet. Waves occasionally around 12 feet. .MONDAY...Southwest winds 10 to 15 knots becoming light and variable. Waves 3 to 5 feet subsiding to 2 feet or less . $$ LHZ363-462>464-151545- 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- 342 AM EDT Thu Oct 15 2026 ...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... .TODAY...East winds 10 to 15 knots decreasing to 5 to 10 knots late in the afternoon. Waves 1 to 3 feet. .TONIGHT...East winds 10 to 15 knots becoming southeast 15 to 20 knots by midnight...then becoming east 10 to 15 knots early in the morning. Rain. Waves 1 to 3 feet building to 3 to 5 feet in the late evening and overnight. .FRIDAY...West winds 15 to 20 knots increasing to 20 to 25 knots with gusts to around 30 knots in the late morning and early afternoon...then becoming north to 30 knots with gusts to 35 knot gales early in the afternoon. A chance of rain. Waves 3 to 5 feet building to 10 to 14 feet. Waves occasionally around 18 feet. .FRIDAY NIGHT...North winds to 30 knots decreasing to 20 to 25 knots after midnight. Gusts to 35 knot gales. A chance of rain. Waves 10 to 14 feet. Waves occasionally around 18 feet. .SATURDAY...North winds 15 to 20 knots becoming northwest 10 to 15 knots late in the morning...then becoming southwest 15 to 20 knots late in the afternoon. Waves 8 to 12 feet subsiding to 4 to 6 feet. Waves occasionally around 15 feet. .SUNDAY...Southwest winds 20 to 25 knots with gusts to 35 knot gales. Waves 6 to 9 feet. Waves occasionally around 12 feet. .MONDAY...Southwest winds 15 to 20 knots decreasingto 5 to 10 knots. Waves 5 to 7 feet subsiding to 1 to 3 feet. Waves occasionally around 10 feet. $$ LHZ461-151545- MAFOR 1509/ HURON NORTH 11200 12210 12310 12316 11206. Waves 1 to 3 feet. HURON SOUTH 12200 12300 11310 12326 11216. Waves 1 to 3 feet today. Waves 1 to 3 feet building to 2 to 4 feet tonight. $$ KDK 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)  437 FZUS63 KDTX 150742 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 342 AM EDT Thu Oct 15 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...High pressure, 30.30 inches, passes across the northern Great Lakes this morning. Low pressure is forecast to strengthen to 29.60 inches as it tracks across the central Great Lakes Thursday night and early Friday. A strong cold front in its wake brings likely northerly gales late Friday. LCZ460-151545- Lake St Clair- 342 AM EDT Thu Oct 15 2026 .TODAY...East winds 10 to 15 knots. Mostly cloudy. Waves 2 feet or less. .TONIGHT...East winds 10 to 15 knots becoming southeast 15 to 20 knots late in the evening...then becoming south 20 to 25 knots after midnight veering to the southwest with gusts to 30 knots early in the morning. Cloudy. Rain likely. A chance of light rain early in the morning. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .FRIDAY...West winds 20 to 25 knots becoming northwest 15 to 20 knots in the late morning and afternoon. Mostly cloudy. A chance of light rain early in the morning. A chance of light rain early in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .FRIDAY NIGHT...North winds 20 to 25 knots increasing to 30 knots in the late evening and overnight. Mostly cloudy early in the evening becoming partly cloudy. A chance of light rain early in the evening. Waves 2 to 4 feet. A Small Craft Advisory may be needed. .SATURDAY...North winds 20 to 25 knots becoming northwest 10 to 15 knots in the afternoon...then backing to the west in the evening. Clear. Waves 2 to 4 feet subsiding to 2 feet or less in the afternoon and evening. .SUNDAY...Southwest winds 10 to 15 knots. Clear. Waves 1 to 3 feet. .MONDAY...Southwest winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. $$ KDK Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes