LMZ779 Expires:202603060430;;689171 Fzus63 Kmkx 052135 Glflm
open lake forecast for lake michigan national weather service milwaukee/sullivan wi 335 pm cst Thu mar 5 2026
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..
east to northeast winds will continue through tonight as weak low pressure around 29.9 inches passes across the northern ohio river valley. Marine dense fog with visibilities of 1 nautical mile or less continues across the southern half of the open waters through tonight. It is possible that fog could start to expand further north this evening into tonight as southerly winds develop across the lake. Fog may persist all the way through Saturday morning until a cold front scours it out.
low pressure around 29.5 inches will develop in the central plains tonight and track toward the upper mississippi river valley by Friday evening. This low will move near or just north of lake michigan later Friday night into Saturday morning, quickly moving into quebec by Saturday evening.
as the low passes to the north, breezy southerly winds will develop for Friday afternoon and night, then shifting west to northwest on Saturday with the passage of the cold front. Widespread rain and embedded Thunderstorms will accompany the approaching and passing low Friday into Friday night. Breezy southwest winds are then forecast for Sunday into Monday.
lmz080-669-671-673-675-777-779-870-872-874-876-878-060430- 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- 335 pm cst Thu mar 5 2026
sheboygan wi to pentwater mi south...
.dense fog advisory in effect until 6 am cst Friday...
Tonight..East winds 10 to 15 kt becoming southeast. Widespread dense fog. Waves 1 to 2 ft.
Friday..Southeast winds 10 to 15 kt becoming south to 30 kt. Areas of dense fog. Chance of rain in the morning, then rain likely with a chance of Thunderstorms in the afternoon. Waves 1 to 2 ft building to 4 to 6 ft occasionally to 8 ft.
Friday night..South winds 15 to 25 kt becoming southwest to 30 kt. Areas of dense fog in the evening. Chance of rain and Thunderstorms in the evening, then rain with a chance of Thunderstorms overnight. Waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
Saturday..Southwest winds to 30 kt becoming west 15 to 25 kt. Rain likely in the morning. Waves 6 to 9 ft occasionally to 12 ft.
Saturday night..Northwest winds 10 to 15 kt becoming west 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
Sunday..Southwest winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft.
Sunday night..Southwest winds to 30 kt. Waves 7 to 10 ft occasionally to 13 ft.
Monday..Southwest winds to 30 kt diminishing to 15 to 25 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft occasionally to 10 ft.
Tuesday..Southeast winds 15 to 25 kt becoming south. Rain likely. Waves 5 to 8 ft occasionally to 10 ft.