256 FZUS63 KDTX 151339 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 939 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. LHZ361-362-152145- 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- 939 AM EDT Thu Oct 15 2026 ...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... .REST OF TODAY...Southeast 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 . $$ LHZ363-462>464-152145- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 939 AM EDT Thu Oct 15 2026 ...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE FRIDAY NIGHT... .REST OF TODAY...East winds 10 to 15 knots decreasing to 5 to 10 knots late in the afternoon. Waves 1 to 3 feet. .TONIGHT...East winds 10 to 15 knots becoming southeast 15 to 20 knots by midnight...then becoming east 10 to 15 knots early in the morning. Rain. Waves 1 to 3 feet building to 3 to 5 feet in the late evening and overnight. .FRIDAY...West winds 15 to 20 knots increasing to 20 to 25 knots with gusts to around 30 knots in the late morning and early afternoon...then becoming north to 30 knots with gusts to 35 knot gales early in the afternoon. A chance of rain. Waves 3 to 5 feet building to 10 to 14 feet. Waves occasionally around 18 feet. .FRIDAY NIGHT...North winds to 30 knots decreasing to 20 to 25 knots after midnight. Gusts to 35 knot gales. A chance of rain. Waves 12 to 16 feet. Waves occasionally around 20 feet. .SATURDAY...North winds 15 to 20 knots becoming northwest 10 to 15 knots late in the morning...then becoming southwest 15 to 20 knots late in the afternoon. Waves 8 to 12 feet subsiding to 4 to 6 feet. Waves occasionally around 15 feet. .SUNDAY...Southwest winds 20 to 25 knots with gusts to 35 knot gales. Waves 6 to 9 feet. Waves occasionally around 12 feet. .MONDAY...Southwest winds 15 to20 knots decreasing to 5 to 10 knots. Waves 5 to 7 feet subsiding to 1 to 3 feet. Waves occasionally around 10 feet. $$ LHZ461-152145- MAFOR 1515/ HURON NORTH 11210 12310 12316 11206 11116 11820. Waves 2 to 4 feet. HURON SOUTH 12300 11310 12326 11216 11110 11720. Waves 2 feet or less this afternoon. Waves 1 to 3 feet building to 2 to 4 feet tonight. Waves 2 to 4 feet Friday morning. $$ DRK 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)  701 FZUS63 KMKX 151348 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 848 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... Two areas of low pressure are progged to merge over the Great Lakes region into a single low pressure later today into tonight and deepen to around 29.4 inches as it shifts into the eastern Great Lakes through Friday. Expect a northerly wind shift to ramp up and increase to gales and nearing storm force at times Friday on the backside of the departing low pressure while a strong high pressure around 30.7 inches builds to the west. A Gale Warning remains 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 & thunderstorms may linger into Friday along the back side of departing low pressure. A few waterspouts are possible in the Friday showers/thunderstorms, particularly over the southern half of Lake Michigan. As the high sinks toward the Ohio River Valley on Saturday, strong low pressure around 29.0 inches will develop in northern Manitoba through the weekend. The tight pressure gradient may bring southwest gales to Lake Michigan on Sunday. LMZ261-362-364-366-563-565-567-868-152130- 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- 848 AM CDT Thu Oct 15 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY NIGHT... .REST OF 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 building to 4 to 7 ft occasionally to 9 ft. .SATURDAY NIGHT...Southwest winds to 30 kt increasing to gales to 35 kt. Waves 6 to 9 ft occasionally to 12 ft building to 8 to 12 ft occasionally to 16 ft. .SUNDAY...Southwest gales to 40 kt. Waves 10 to 14 ft occasionally to 18 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 2 to 4 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-152130- 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- 848 AM CDT Thu Oct 15 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...GALE WARNING IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY NIGHT... .REST OF TODAY...East winds 10 to 20 kt becoming southeast 15 to 25 kt. Slight chance of showers through mid morning, then 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 and slight chance of thunderstorms in the evening, then 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 likely 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 3 to 5 ft. .SATURDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt. Waves 7 to 10 ft occasionally to 13 ft. .SUNDAY...Southwest winds to 30 kt increasing to gales to 40 kt. Waves 10 to 14 ft occasionally to 18 ft. .MONDAY...Southwest winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. $$ &&STORM LMZ761-152130- MAFOR 1516/ MICHIGAN NORTH...GALE WARNING IN EFFECT...11320 11326 11226 11216 11126 11846 11840 11846. Waves 2 to 4 feet building to 3 to 5 feet this afternoon. Waves 3 to 5 feet building to 3 to 6 feet tonight. Waves 5 to 8 feet Friday morning. MICHIGAN SOUTH...GALE WARNING IN EFFECT...11326 13336 14740. Waves 3 to 6 feet this afternoon. Waves 3 to 6 feet building to 6 to 9 feet tonight. Waves 7 to 10 feet Friday morning. $$ DDV Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes