Expires:202506192115;;011555 FZUS63 KMKX 191358 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 858 AM CDT Thu Jun 19 2025 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... Lighter northwest winds will become southwesterly later this afternoon into Friday. Will continue to see stronger southerly winds through the weekend as a deepening low pressure develops over the Dakotas and slowly moves into the Upper Midwest early next week. Gales are not expected with this system at this time. LMZ080-669-671-673-675-777-779-870-872-874-876-878-192115- 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- 858 AM CDT Thu Jun 19 2025 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TODAY...Northwest winds 10 to 20 kt backing to southwest 10 to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft. .TONIGHT...Southwest winds 10 to 15 kt. Chance of showers and slight chance of thunderstorms overnight. Waves 1 to 2 ft. .FRIDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt. Chance of showers. Waves 2 to 4 ft. .FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to 25 kt. Chance of showers in the evening. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. .SATURDAY...South winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft. .SATURDAY NIGHT...South winds to 30 kt becoming southwest 15 to 25 kt. Waves 6 to 9 ft occasionally to 12 ft. .SUNDAY...Southwest winds 15 to 25 kt becoming south to 30 kt. Waves 4 to 7 ft occasionally to 9 ft. .MONDAY...Southwest winds 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft. $$