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(1/2)
Latest Great Lakes Marine Forecast by KMKX
Issued 12/14/2025 9:18 PM US/Central.
Valid through 12/15/2025 4:30 AM US/Central.
fzus63 kmkx 150318
glflm
expires:202512151030;;602173
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
918 pm cst sun dec 14 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...
strong southwest winds are expected to develop later tonight into
monday, with strong high pressure around 30.7 inches well to the
southeast and a frontal boundary moving into lake superior. a
gale warning is in effect for this time frame across lake
michigan.
a weak cold front will shift winds to the west monday afternoon
and evening. low pressure around 29.2 inches then develops in
southern alberta and progresses eastward across southern canada,
bringing gusty southwest winds and gale potential to the northern
half of the lake tuesday afternoon and tuesday night.
winds diminish and become westerly to northwesterly late tuesday
night into wednesday, as low pressure exits the region. another
system is expected on thursday, bringing gusty southwest winds,
with gusty northwest winds thursday night into friday. gales may
be possible at times during these periods.
lmz261-362-364-366-563-565-567-868-151030-
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-
918 pm cst sun dec 14 2025
sheboygan wi to pentwater mi north...
...gale warning in effect from 3 am cst monday through monday
morning...
.rest of tonight...southwest winds 15 to 25 kt increasing to
gales to 35 kt. freezing spray overnight. chance of snow showers
overnight. waves 2 to 4 ft building to 6 to 9 ft occasionally to
12 ft.
.monday...southwest gales to 40 kt becoming west to 30 kt late in
the morning, then diminishing to 15 to 25 kt early in the
afternoon diminishing to 10 to 20 kt late. freezing spray in the
morning. chance of snow showers in the morning. waves 8 to 11 ft
occasionally to 14 ft subsiding to 5 to 8 ft occasionally to
10 ft.
.monday night...northwest winds 10 to 15 kt becoming southwest.
waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to 2 ft.
.tuesday...southwest winds to 30 kt increasing to gales to 40 kt
in the afternoon. waves 5 to 8 ft occasionally to 10 ft building
to 10 to 14 ft occasionally to 18 ft.
.tuesday night...southwest gales to 40 kt becoming west gales to
35 kt. waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to
11 ft occasionally to 14 ft.
.wednesday...northwest winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.wednesday night...south gales to 35 kt increasing to gales to
40 kt. chance of rain. waves 8 to 11 ft occasionally to 14 ft
building to 14 to 18 ft occasionally to 23 ft.
.thursday...south gales to 40 kt becoming southwest. rain with
snow likely. waves 14 to 18 ft occasionally to 23 ft subsiding to
12 to 16 ft occasionally to 21 ft.
.friday...northwest winds 15 to 25 kt becoming west to 30 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMKX
Issued 12/14/2025 9:18 PM US/Central.
Valid through 12/15/2025 4:30 AM US/Central.
fzus63 kmkx 150318
glflm
expires:202512151030;;602174
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
918 pm cst sun dec 14 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...
strong southwest winds are expected to develop later tonight into
monday, with strong high pressure around 30.7 inches well to the
southeast and a frontal boundary moving into lake superior. a
gale warning is in effect for this time frame across lake
michigan.
a weak cold front will shift winds to the west monday afternoon
and evening. low pressure around 29.2 inches then develops in
southern alberta and progresses eastward across southern canada,
bringing gusty southwest winds and gale potential to the northern
half of the lake tuesday afternoon and tuesday night.
winds diminish and become westerly to northwesterly late tuesday
night into wednesday, as low pressure exits the region. another
system is expected on thursday, bringing gusty southwest winds,
with gusty northwest winds thursday night into friday. gales may
be possible at times during these periods.
lmz080-669-671-673-675-777-779-870-872-874-876-878-151030-
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-
918 pm cst sun dec 14 2025
sheboygan wi to pentwater mi south...
...gale warning in effect from 3 am cst monday through monday
morning...
.rest of tonight...southwest winds 10 to 20 kt increasing to
30 kt. freezing spray overnight. waves 3 to 5 ft building to 6 to
9 ft occasionally to 12 ft.
.monday...southwest gales to 35 kt becoming west 15 to 25 kt.
freezing spray in the morning. waves 8 to 12 ft occasionally to
16 ft subsiding to 6 to 9 ft occasionally to 12 ft.
.monday night...west winds 10 to 20 kt diminishing to 10 to 15 kt
late in the evening, then diminishing to 5 to 10 kt after
midnight becoming southwest 10 to 15 kt late. waves 4 to 7 ft
occasionally to 9 ft subsiding to 1 to 3 ft.
.tuesday...southwest winds to 30 kt. waves 5 to 8 ft occasionally
to 10 ft building to 10 to 14 ft occasionally to 18 ft.
.tuesday night...southwest winds to 30 kt becoming west. waves
10 to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft
occasionally to 14 ft.
.wednesday...west winds 10 to 20 kt becoming southwest. waves
5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft.
.wednesday night...south gales to 35 kt increasing to gales to
40 kt. chance of rain. waves 7 to 10 ft occasionally to 13 ft
building to 12 to 16 ft occasionally to 21 ft.
.thursday...south gales to 40 kt becoming west. rain likely.
waves 12 to 16 ft occasionally to 21 ft.
.friday...northwest winds to 30 kt becoming southwest. freezing
spray. waves 10 to 14 ft occasionally to 18 ft subsiding to 5 to
8 ft occasionally to 10 ft.
$$
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