Expires:202110220330;;046342 FZUS63 KMKX 211951 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 251 PM CDT Thu Oct 21 2021 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... Low pressure of 29.7 inches over southern Ontario will move to southern Quebec this evening. Northerly gales will gradually diminish from northern Lake Michigan to southern Lake Michigan late this afternoon into the early evening. Modest northwesterly winds will then prevail Friday and Saturday leading to some lake effect shower activity over the eastern half of the lake. Some low level instability will be present supporting some waterspout threat with this lake effect shower activity, especially over the southern end of the lake. Low pressure passing to the south late Sunday night and Monday may then lead to easterly gales for the south half of the lake. LMZ080-669-671-673-675-777-779-870-872-874-876-878-220330- 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- 251 PM CDT Thu Oct 21 2021 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...GALE WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING... .TONIGHT...Northwest gales to 35 kt becoming north 10 to 15 kt. Scattered rain showers and slight chance of rain. Waves 8 to 12 ft occasionally to 16 ft subsiding to 4 to 6 ft occasionally to 8 ft. .FRIDAY...Northwest winds 10 to 15 kt diminishing to 5 to 10 kt. Slight chance of rain. Waves 3 to 5 ft subsiding to 2 to 4 ft. .FRIDAY NIGHT...Northwest winds 5 to 10 kt increasing to 10 to 20 kt. Waves 1 to 3 ft. .SATURDAY...Northwest winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 2 to 4 ft. .SATURDAY NIGHT...North winds 5 to 10 kt becoming northeast 10 to 15 kt. Waves 1 to 3 ft. .SUNDAY...East winds 10 to 20 kt increasing to 30 kt in the afternoon. Chance of rain. Waves 2 to 4 ft building to 3 to 5 ft. .SUNDAY NIGHT...East winds to 30 kt increasing to gales to 35 kt. Rain. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft. .MONDAY...East gales to 35 kt becoming northeast. Rain likely. Waves 5 to 8 ft occasionally to 10 ft. .TUESDAY...East winds 10 to 20 kt. Waves 2 to 4 ft. $$