Illinois North Offshore Forecast lmz777: Expires:202505102115;;278954 FZUS63 KMKX 101404 GLFLM
OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 904 AM CDT Sat May 10 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 progressing across the southern third of Lake Michigan this morning, with northerly winds in place across the majority of the open waters. West-southwest winds continue to the south of the front over far southern Lake Michigan, but will quickly transition to northerly as the boundary departs late this morning. Northerly winds will continue into this afternoon, with the strongest readings anticipated over the southern half of the open waters. Widespread 25-30 kt gusts are forecast across this portion of Lake Michigan through early evening, with a few gusts near gale force possible. Gale Warnings won’t be necessary given the isolated and brief nature of any such gusts. Winds will quickly taper this evening as 30.5 inch high pressure drifts south along the Ontario-Quebec border.
Winds will turn southwesterly across the northern half of Lake Michigan Sunday afternoon while northeasterly winds continue to persist further south. Southerly to southeasterly winds will return to the entirety of the open waters Sunday night through Tuesday morning as 29.3 inch low pressure builds into the northern Great Plains. Brief periods of east-northeast winds are forecast during the afternoon hours on Tuesday and Wednesday as an area of 29.8 inch low pressure approaches southern Lake Michigan. Isolated afternoon showers and thunderstorms will accompany the approaching surface low both Tuesday and Wednesday. A larger area of 29.4 inch low pressure will form in the northern Great Plains Wednesday night, approaching and ultimately crossing northern Lake Michigan Thursday through Thursday night. The low’s approach will result in increasing southeast winds across the open waters through Thursday afternoon. Gales aren’t expected at this time, though trends will be monitored in the coming forecasts. More widespread shower and thunderstorms will accompany the passing low, with the best chances being Thursday afternoon and evening..
LMZ080-669-671-673-675-777-779-870-872-874-876-878-102115- 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- 904 AM CDT Sat May 10 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH…
.REST OF TODAY…North winds to 30 kt. Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft. .TONIGHT…North winds to 30 kt diminishing to 15 to 25 kt late in the evening, then becoming northeast 10 to 20 kt after midnight diminishing to 10 to 15 kt late. Waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft. .SUNDAY…East winds 10 to 15 kt becoming northeast. Waves 2 to 4 ft subsiding to 1 to 2 ft. .SUNDAY NIGHT…East winds 5 to 10 kt becoming southeast 10 to 15 kt. Waves 1 to 2 ft. .MONDAY…Southeast winds 5 to 10 kt becoming east 10 to 15 kt. Waves 1 to 2 ft. .MONDAY NIGHT…East winds 5 to 10 kt becoming southeast 10 to 15 kt. Waves 1 to 2 ft. .TUESDAY…Southeast winds 10 to 15 kt becoming east 5 to 10 kt. Waves 1 to 2 ft. .WEDNESDAY…Southeast winds 5 to 10 kt becoming east 10 to 15 kt. Waves 1 to 2 ft.
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OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 904 AM CDT Sat May 10 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 progressing across the southern third of Lake Michigan this morning, with northerly winds in place across the majority of the open waters. West-southwest winds continue to the south of the front over far southern Lake Michigan, but will quickly transition to northerly as the boundary departs late this morning. Northerly winds will continue into this afternoon, with the strongest readings anticipated over the southern half of the open waters. Widespread 25-30 kt gusts are forecast across this portion of Lake Michigan through early evening, with a few gusts near gale force possible. Gale Warnings won’t be necessary given the isolated and brief nature of any such gusts. Winds will quickly taper this evening as 30.5 inch high pressure drifts south along the Ontario-Quebec border.
Winds will turn southwesterly across the northern half of Lake Michigan Sunday afternoon while northeasterly winds continue to persist further south. Southerly to southeasterly winds will return to the entirety of the open waters Sunday night through Tuesday morning as 29.3 inch low pressure builds into the northern Great Plains. Brief periods of east-northeast winds are forecast during the afternoon hours on Tuesday and Wednesday as an area of 29.8 inch low pressure approaches southern Lake Michigan. Isolated afternoon showers and thunderstorms will accompany the approaching surface low both Tuesday and Wednesday. A larger area of 29.4 inch low pressure will form in the northern Great Plains Wednesday night, approaching and ultimately crossing northern Lake Michigan Thursday through Thursday night. The low’s approach will result in increasing southeast winds across the open waters through Thursday afternoon. Gales aren’t expected at this time, though trends will be monitored in the coming forecasts. More widespread shower and thunderstorms will accompany the passing low, with the best chances being Thursday afternoon and evening..
LMZ080-669-671-673-675-777-779-870-872-874-876-878-102115- 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- 904 AM CDT Sat May 10 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH…
.REST OF TODAY…North winds to 30 kt. Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft. .TONIGHT…North winds to 30 kt diminishing to 15 to 25 kt late in the evening, then becoming northeast 10 to 20 kt after midnight diminishing to 10 to 15 kt late. Waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft. .SUNDAY…East winds 10 to 15 kt becoming northeast. Waves 2 to 4 ft subsiding to 1 to 2 ft. .SUNDAY NIGHT…East winds 5 to 10 kt becoming southeast 10 to 15 kt. Waves 1 to 2 ft. .MONDAY…Southeast winds 5 to 10 kt becoming east 10 to 15 kt. Waves 1 to 2 ft. .MONDAY NIGHT…East winds 5 to 10 kt becoming southeast 10 to 15 kt. Waves 1 to 2 ft. .TUESDAY…Southeast winds 10 to 15 kt becoming east 5 to 10 kt. Waves 1 to 2 ft. .WEDNESDAY…Southeast winds 5 to 10 kt becoming east 10 to 15 kt. Waves 1 to 2 ft.
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