fzus63 kmkx 190155
glflm 
expires:202603190915;;928290

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
855 pm cdt wed mar 18 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...

29.8 inch low pressure is positioned over ontario this evening, 
resulting in generally southwest winds across the open waters of 
lake michigan. said low will advance toward the southern hudson 
bay through daybreak as 30.1 inch high pressure builds into 
wisconsin from the northern great plains. thus anticipate that the
current southwest winds will trend light and variable by 
daybreak, with variable winds continuing through thursday morning.
some light rain is possible over the southern half of the open 
waters through sunrise. a new area of 29.7 inch low pressure is 
forecast to develop in the canadian great plains thursday 
afternoon, allowing winds to turn east-southeasterly across lake 
michigan. winds will veer south to southwesterly across the waters
thursday night as the surface low progresses over or just north 
of the northern half of lake michigan. some rain or snow is 
possible over northern lake michigan during the low's passage, 
with wind gusts expected to remain below gale thresholds. winds 
will turn west- northwesterly on friday as a cold front moves 
across the waters.

winds will become light friday night through saturday morning as 
30.0 inch high pressure moves across lake michigan. increasing 
southerly winds are expected saturday afternoon as a cold front 
approaches from the north. the front is expected to cross lake 
michigan saturday night into sunday morning, bringing gusty 
northerly winds into monday morning. rain and snow showers will 
accompany the passing cold front. widespread gales are not 
anticipated at this time, though trends will be monitored over 
coming forecasts. winds will decrease monday night, ultimately 
turning southerly and increasing once again during the day on 
tuesday.


lmz261-362-364-366-563-565-567-868-190915-
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-
855 pm cdt wed mar 18 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds 10 to 20 kt becoming west
10 to 15 kt. chance of snow through early evening, then chance of
rain and slight chance of very light freezing drizzle overnight.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.thursday...northwest winds 5 to 10 kt backing to southeast.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.thursday night...southeast winds 5 to 10 kt becoming south 10 to
15 kt late in the evening, then increasing to 10 to 20 kt after
midnight becoming south 10 to 20 kt late. chance of light
freezing rain in the evening, then chance of rain and light
freezing rain likely overnight. waves 1 ft or less building to
1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming west 10 to 15 kt.
light freezing rain likely in the morning. waves 2 to 4 ft. 
.friday night...northwest winds 10 to 15 kt. waves 1 to 2 ft. 
.saturday...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.saturday night...north winds 15 to 25 kt increasing to 30 kt.
chance of rain and snow. waves 4 to 6 ft occasionally to 8 ft
building to 6 to 9 ft occasionally to 12 ft. 
.sunday...northeast winds to 30 kt. waves 7 to 10 ft occasionally
to 13 ft. 
.monday...northeast winds 10 to 20 kt becoming north. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 190155
glflm 
expires:202603190915;;928291

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
855 pm cdt wed mar 18 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...

29.8 inch low pressure is positioned over ontario this evening, 
resulting in generally southwest winds across the open waters of 
lake michigan. said low will advance toward the southern hudson 
bay through daybreak as 30.1 inch high pressure builds into 
wisconsin from the northern great plains. thus anticipate that the
current southwest winds will trend light and variable by 
daybreak, with variable winds continuing through thursday morning.
some light rain is possible over the southern half of the open 
waters through sunrise. a new area of 29.7 inch low pressure is 
forecast to develop in the canadian great plains thursday 
afternoon, allowing winds to turn east-southeasterly across lake 
michigan. winds will veer south to southwesterly across the waters
thursday night as the surface low progresses over or just north 
of the northern half of lake michigan. some rain or snow is 
possible over northern lake michigan during the low's passage, 
with wind gusts expected to remain below gale thresholds. winds 
will turn west- northwesterly on friday as a cold front moves 
across the waters.

winds will become light friday night through saturday morning as 
30.0 inch high pressure moves across lake michigan. increasing 
southerly winds are expected saturday afternoon as a cold front 
approaches from the north. the front is expected to cross lake 
michigan saturday night into sunday morning, bringing gusty 
northerly winds into monday morning. rain and snow showers will 
accompany the passing cold front. widespread gales are not 
anticipated at this time, though trends will be monitored over 
coming forecasts. winds will decrease monday night, ultimately 
turning southerly and increasing once again during the day on 
tuesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190915-
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-
855 pm cdt wed mar 18 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 15 kt becoming west. chance
of rain overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.thursday...northwest winds 5 to 10 kt veering to east. slight
chance of rain in the morning. waves 1 to 2 ft. 
.thursday night...east winds 5 to 10 kt becoming southeast late
in the evening, then becoming south 10 to 15 kt after midnight
increasing to 10 to 20 kt late. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming northwest 10 to
15 kt. waves 2 to 4 ft. 
.friday night...northwest winds 5 to 10 kt becoming north 10 to
15 kt. waves 1 to 3 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
2 to 4 ft. 
.saturday night...southwest winds 10 to 20 kt veering to
northwest to 30 kt. waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft. 
.sunday...north winds to 30 kt. waves 8 to 12 ft occasionally to
16 ft. 
.monday...northeast winds 15 to 25 kt becoming north 10 to 20 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft.  

$$