


Great Lakes Forecast
Issued by NWS
Issued by NWS
011 FZUS63 KMKX 040122 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 822 PM CDT Tue Jun 3 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... A cold front is approaching Lake Michigan this evening, and is forecast to cross the open waters tonight. The boundary passage will bring a northwest wind shift to the entirety of Lake Michigan by sunrise. Winds will become southerly across northern Lake Michigan this afternoon as 29.6 inch low pressure moves across the Hudson Bay. Winds will remain northerly across the southern half of the waters as 30.0 inch high pressure drifts into the upper Mississippi River Valley. This general pattern will continue through Thursday. Winds will shift northeasterly across all of Lake Michigan on Friday, when an area of 29.9 inch low pressure will move into the Appalachian Mountains. Expect north-northeast winds to continue into the day on Saturday. No gales are anticipated through the period. Periods of showers and embedded thunderstorms will continue along and ahead of a cold front through tonight, gradually pushing east of Lake Michigan by Wednesday evening. Severe weather is not anticipated in this activity. Predominantly dry conditions prevail through the remainder of the week. The next widespread chances for showers and thunderstorms arrive on Sunday. It is too early to determine if severe weather will be possible in any of this activity. LMZ261-362-364-366-563-565-567-868-040915- 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- 822 PM CDT Tue Jun 3 2025 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TONIGHT...South winds to 30 kt becoming southwest late this evening, then becoming west after midnight becoming northwest 10 to 20 kt late. Showers with a chance of thunderstorms. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. .WEDNESDAY...Northwest winds 10 to 20 kt backing to southwest 10 to 15 kt. Chance of showers in the morning. Areas of smoke. Waves 3 to 5 ft subsiding to 1 to 3 ft. .WEDNESDAY NIGHT...Southwest winds 5 to 10 kt becoming south. Areas of smoke. Waves 1 to 2 ft. .THURSDAY...South winds 5 to 10 kt becoming southwest. Waves 1 ft or less. .THURSDAY NIGHT...East winds 5 to 10 kt. Waves 1 ft or less. .FRIDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt. Waves 1 ft or less. .FRIDAY NIGHT...Northeast winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 ft or less. .SATURDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves 1 ft or less. .SUNDAY...South winds 10 to 20 kt. Chance of showers. Waves 2 to 4 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-040915- 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- 822 PM CDT Tue Jun 3 2025 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TONIGHT...South winds to 30 kt becoming west 15 to 25 kt. Chance of showers and slight chance of thunderstorms through early evening, then showers and slight chance of thunderstorms overnight. Areas of smoke overnight. Waves 4 to 6 ft occasionally to 8 ft. .WEDNESDAY...Northwest winds 10 to 20 kt becoming north 10 to 15 kt. Showers and slight chance of thunderstorms in the morning, then chance of showers in the afternoon. Waves 3 to 5 ft subsiding to 1 to 3 ft. .WEDNESDAY NIGHT...North winds 5 to 10 kt. Areas of smoke in the evening. Chance of showers in the evening. Waves 1 to 2 ft. .THURSDAY...North winds 5 to 10 kt increasing to 10 to 15 kt in the afternoon. Waves 1 to 2 ft. .THURSDAY NIGHT...North winds 10 to 15 kt becoming northeast 5 to 10 kt. Waves 1 to 2 ft. .FRIDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt. Waves 1 to 2 ft. .FRIDAY NIGHT...Northeast winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft. .SATURDAY...North winds 10 to 15 kt. Waves 1 to 2 ft. .SUNDAY...Southwest winds 10 to 20 kt becoming south. Chance of showers. Waves 2 to 4 ft. $$ LMZ761-040915- MAFOR 0404/ MICHIGAN NORTH 11646 11726 11720 11710 11610 11510 11500 11400. A chance of thunderstorms overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet Wednesday. Waves 2 feet or less Wednesday evening. MICHIGAN SOUTH 11546 11536 11726 12826 11810 12800. Waves 3 to 5 feet overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet Wednesday. Waves 2 feet or less Wednesday evening. $$ Quigley Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes