Great Lakes Forecast
Issued by NWS
Issued by NWS
209 FZUS63 KMKX 220144 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 844 PM CDT Sat Sep 21 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... Expect southerly winds increase through the evening as low pressure around 29.7 inches lifts from MN to Ontario, which will in turn drag a cold front across WI and Lake Michigan overnight through tomorrow. Showers and thunderstorms will develop ahead of and along the cold front. Southwesterly winds will become northerly behind this front Sunday night into Monday. Given the strong cold air moving over the warmer lake waters, expecting to see gusty northerly winds during this timeframe. Gusts up to 30 knots and a few gale force gusts cannot be ruled out, especially for the southern portions of Lake Michigan. Will see winds weaken a bit for Monday as high pressure builds in across the Great Lakes region, but the northerly component will persist through the start of the week. LMZ261-362-364-366-563-565-567-868-220915- 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- 844 PM CDT Sat Sep 21 2024 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TONIGHT...South winds 10 to 20 kt. Slight chance of showers through early evening, then chance of showers and thunderstorms overnight. Waves 1 to 3 ft. .SUNDAY...Southwest winds 10 to 20 kt veering to northwest 15 to 25 kt late in the morning, then becoming north early in the afternoon increasing to 30 kt late. Chance of showers and thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Patchy fog in the afternoon. Waves 1 to 2 ft building to 4 to 7 ft occasionally to 9 ft. .SUNDAY NIGHT...North winds to 30 kt diminishing to 15 to 25 kt. Waves 6 to 9 ft occasionally to 12 ft. .MONDAY...Northeast 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. .MONDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft. .TUESDAY...Northeast winds 10 to 15 kt. Waves 1 to 3 ft. .TUESDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft. .WEDNESDAY...Northwest winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft. .THURSDAY...North winds 10 to 15 kt. Waves 1 ft or less. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-220915- 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- 844 PM CDT Sat Sep 21 2024 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TONIGHT...Southeast winds 10 to 15 kt becoming south. Slight chance of showers through early evening, then slight chance of showers and thunderstorms overnight. Waves 1 to 2 ft. .SUNDAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt late in the morning, then becoming northwest 15 to 25 kt early in the afternoon becoming north to 30 kt late. Chance of showers and thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Patchy fog in the afternoon. Waves 1 to 3 ft building to 4 to 7 ft occasionally to 9 ft. .SUNDAY NIGHT...North winds to 30 kt diminishing to 15 to 25 kt. Chance of showers in the evening. Waves 7 to 10 ft occasionally to 13 ft. .MONDAY...Northeast winds 15 to 25 kt becoming north 10 to 20 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 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 overnight. Waves 3 to 5 ft. .TUESDAY...Northeast winds 10 to 15 kt becoming north. Chance of showers. Waves 2 to 4 ft. .TUESDAY NIGHT...North winds 10 to 15 kt. Waves 1 to 3 ft. .WEDNESDAY...North winds 10 to 15 kt. Waves 1 to 3 ft. .THURSDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves 1 to 2 ft. $$ LMZ761-220915- MAFOR 2204/ MICHIGAN NORTH 11420 12410 11726 12836 12840. A chance of thunderstorms overnight and Sunday. Waves 2 feet or less overnight. Waves 1 to 3 feet building to 4 to 7 feet Sunday. Waves 5 to 8 feet Sunday evening. MICHIGAN SOUTH 13410 11526 11636 11736 12840. A chance of thunderstorms Sunday. Waves 2 feet or less overnight. Waves 2 feet or less building to 3 to 6 feet Sunday. Waves 5 to 9 feet Sunday evening. $$ Boxell Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes