Great Lakes Forecast
Issued by NWS
Issued by NWS
610 FZUS63 KMKX 210152 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 852 PM CDT Fri Sep 20 2024 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 will continue to slowly move east across Lake Michigan tonight. Light southerly winds will shift westerly and diminish behind this front as weak high pressure builds into Saturday morning. Patchy dense fog is possible in the northern half of the open waters tonight into Saturday morning with light winds and a moist airmass. Winds will become southerly once again Saturday afternoon and evening ahead of a Canadian cold front Sunday morning. Isolated to scattered thunderstorms are expected ahead of and along this front, ending by Sunday evening. Winds will shift to become modest and northerly behind the front and will continue into early next week. LMZ261-362-364-366-563-565-567-868-210930- 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- 852 PM CDT Fri Sep 20 2024 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TONIGHT...South winds 10 to 15 kt veering to west. Patchy fog. Waves 1 to 3 ft. .SATURDAY...Northwest winds 5 to 10 kt backing to south. Patchy dense fog in the morning. Waves 1 to 2 ft. .SATURDAY NIGHT...South winds 10 to 15 kt becoming southwest. Chance of showers overnight. Waves 1 to 2 ft. .SUNDAY...Northwest winds 10 to 15 kt becoming north 10 to 20 kt. Showers likely. Waves 2 to 4 ft. .SUNDAY NIGHT...North winds 10 to 20 kt. Showers likely in the evening, then chance of showers overnight. Waves 3 to 5 ft. .MONDAY...North winds 10 to 20 kt. Waves 3 to 5 ft. .MONDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to 15 kt. Chance of showers. Waves 2 to 4 ft. .TUESDAY...Northeast winds 10 to 15 kt becoming north 10 to 20 kt. Chance of showers. Waves 1 to 3 ft. .WEDNESDAY...Northwest winds 10 to 15 kt becoming west 10 to 20 kt. Waves 1 to 2 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-210930- 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- 852 PM CDT Fri Sep 20 2024 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TONIGHT...South winds 5 to 10 kt veering to northwest. Waves 1 to 3 ft. .SATURDAY...West winds 5 to 10 kt backing to southeast. Waves 1 to 2 ft. .SATURDAY NIGHT...Southeast winds 10 to 15 kt becoming south. Chance of showers and thunderstorms overnight. Waves 1 to 2 ft. .SUNDAY...Southwest winds 10 to 15 kt veering to northwest 10 to 20 kt. Showers likely with a chance of thunderstorms in the morning, then showers in the afternoon. Waves 2 to 4 ft. .SUNDAY NIGHT...North winds 10 to 20 kt. Showers likely in the evening, then chance of showers overnight. Waves 4 to 6 ft occasionally to 8 ft. .MONDAY...North winds 10 to 20 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft. .MONDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to 15 kt. Chance of showers. Waves 3 to 5 ft. .TUESDAY...Northeast winds 10 to 20 kt becoming north. Chance of showers. Waves 2 to 4 ft. .WEDNESDAY...Northwest winds 10 to 15 kt. Waves 1 to 3 ft. $$ LMZ761-210930- MAFOR 2104/ MICHIGAN NORTH 11510 11600 11700 19704 11600 11500 13410. Waves 1 to 3 feet overnight. Waves 2 feet or less Saturday and Saturday evening. MICHIGAN SOUTH 11500 11600 11700 11500 11400 13310. Waves 2 feet or less. $$ MH Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes