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Latest Great Lakes Marine Forecast by KMKX
Issued 4/6/2026 3:13 AM US/Central.
Valid through 4/6/2026 10:15 AM US/Central.
fzus63 kmkx 060813
glflm
expires:202604061515;;915079
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 am cdt mon apr 6 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...
northwest winds will increase today as a small area of low
pressure around 30.0 inches develops east of lake huron. a few
gale force gusts are possible over the northern half of the open
waters during the afternoon hours.
winds will decrease tonight into tuesday as high pressure around
30.5 inches moves over and east of the area. some moderate
freezing spray is possible over the northern half of the lake
this evening.
low pressure around 29.6 inches will form over the northern great
plains and approach lake michigan tuesday night into wednesday,
resulting in increasing southerly winds across the waters. winds
will remain gusty into wednesday night as the low passes north of
lake superior. gale force gusts will be possible with this
system.
winds will taper during the day thursday, with high pressure
around 30.4 inches moving from the northern plains toward lake
superior. showers and a few thunderstorms are forecast wednesday
into thursday.
lmz261-362-364-366-563-565-567-868-061515-
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-
313 am cdt mon apr 6 2026
sheboygan wi to pentwater mi north...
.today...northwest winds 10 to 20 kt becoming north to 30 kt.
scattered snow showers this morning, then scattered snow and rain
showers this afternoon. waves 2 to 4 ft building to 6 to 9 ft
occasionally to 12 ft.
.tonight...north winds to 30 kt diminishing to 10 to 20 kt.
freezing spray in the evening. scattered snow showers in the
evening. waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to
8 ft occasionally to 10 ft.
.tuesday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft.
.tuesday night...south winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft.
.wednesday...south winds to 30 kt increasing to gales to 35 kt.
chance of rain and snow in the morning, then chance of snow in
the afternoon. waves 8 to 12 ft occasionally to 16 ft building to
10 to 14 ft occasionally to 18 ft.
.wednesday night...south gales to 40 kt. rain. waves 10 to 14 ft
occasionally to 18 ft.
.thursday...southwest gales to 35 kt diminishing to 30 kt. chance
of rain showers. waves 8 to 11 ft occasionally to 14 ft subsiding
to 5 to 8 ft occasionally to 10 ft.
.friday...north winds 10 to 15 kt. waves 1 to 3 ft.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMKX
Issued 4/6/2026 3:13 AM US/Central.
Valid through 4/6/2026 10:15 AM US/Central.
fzus63 kmkx 060813
glflm
expires:202604061515;;915080
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 am cdt mon apr 6 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...
northwest winds will increase today as a small area of low
pressure around 30.0 inches develops east of lake huron. a few
gale force gusts are possible over the northern half of the open
waters during the afternoon hours.
winds will decrease tonight into tuesday as high pressure around
30.5 inches moves over and east of the area. some moderate
freezing spray is possible over the northern half of the lake
this evening.
low pressure around 29.6 inches will form over the northern great
plains and approach lake michigan tuesday night into wednesday,
resulting in increasing southerly winds across the waters. winds
will remain gusty into wednesday night as the low passes north of
lake superior. gale force gusts will be possible with this
system.
winds will taper during the day thursday, with high pressure
around 30.4 inches moving from the northern plains toward lake
superior. showers and a few thunderstorms are forecast wednesday
into thursday.
lmz080-669-671-673-675-777-779-870-872-874-876-878-061515-
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-
313 am cdt mon apr 6 2026
sheboygan wi to pentwater mi south...
.today...northwest winds 10 to 20 kt increasing to 30 kt.
scattered snow showers with isolated rain showers this afternoon.
waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft.
.tonight...north winds to 30 kt diminishing to 10 to 20 kt.
isolated snow showers in the evening. waves 7 to 10 ft
occasionally to 13 ft subsiding to 6 to 9 ft occasionally to
12 ft.
.tuesday...north winds 10 to 15 kt diminishing to 5 to 10 kt late
in the morning, then becoming northeast early in the afternoon
becoming northeast 5 to 10 kt late. waves 5 to 8 ft occasionally
to 10 ft subsiding to 2 to 4 ft.
.tuesday night...southeast winds 10 to 15 kt increasing to 15 to
25 kt overnight. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft.
.wednesday...south winds to 30 kt increasing to gales to 35 kt.
waves 8 to 11 ft occasionally to 14 ft building to 8 to 12 ft
occasionally to 16 ft.
.wednesday night...south gales to 35 kt. chance of rain. waves
8 to 12 ft occasionally to 16 ft.
.thursday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 8 to 11 ft occasionally to 14 ft
subsiding to 5 to 8 ft occasionally to 10 ft.
.friday...north winds 10 to 15 kt. waves 1 to 3 ft.
$$
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