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Latest Great Lakes Marine Forecast by KMKX
Issued 7/9/2025 8:43 PM US/Central.
Valid through 7/10/2025 4:15 AM US/Central.
fzus63 kmkx 100143
glflm
expires:202507100915;;174920
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 pm cdt wed jul 9 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...
high pressure of 30.1 inches will linger over the upper great
lakes into thursday night. breezy north winds over the southern
half of the lake will give way to generally light and northerly
winds tonight through thursday. rain and a few thunderstorms may
move over the southern half of the lake thursday night before
exiting to the east.
a slow moving low pressure system around 29.6 inches will advance
from the northern plains into the northern great lakes region
friday through sunday. a warm front will lift north friday
morning and winds will shift to southerly over the lake. winds
remain light until they turn southwesterly saturday ahead of an
approaching cold front, where gusts may reach 20 knots. winds then
ease and become westerly following the frontal passage saturday
night into sunday. there will be chances for multiple rounds rain
and thunderstorms across the lake from friday night through early
sunday morning.
lmz261-362-364-366-563-565-567-868-100915-
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-
843 pm cdt wed jul 9 2025
sheboygan wi to pentwater mi north...
.rest of tonight...north winds 10 to 20 kt diminishing to 5 to
10 kt. patchy fog overnight. waves 1 to 3 ft subsiding to 1 to
2 ft.
.thursday...north winds 5 to 10 kt. waves 1 ft or less.
.thursday night...southeast winds 5 to 10 kt. waves 1 ft or less.
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 ft or less building to 1 to 3 ft.
.friday night...south winds 10 to 15 kt. chance of showers and
thunderstorms. waves 1 to 3 ft.
.saturday...southwest winds 10 to 20 kt. chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. waves 2 to 4 ft.
.saturday night...southwest winds 10 to 20 kt becoming west 10 to
15 kt. chance of showers and thunderstorms. waves 1 to 3 ft.
.sunday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 1 to 2 ft.
.monday...southwest winds 10 to 20 kt. waves 1 to 2 ft.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMKX
Issued 7/9/2025 8:43 PM US/Central.
Valid through 7/10/2025 4:15 AM US/Central.
fzus63 kmkx 100143
glflm
expires:202507100915;;174921
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 pm cdt wed jul 9 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...
high pressure of 30.1 inches will linger over the upper great
lakes into thursday night. breezy north winds over the southern
half of the lake will give way to generally light and northerly
winds tonight through thursday. rain and a few thunderstorms may
move over the southern half of the lake thursday night before
exiting to the east.
a slow moving low pressure system around 29.6 inches will advance
from the northern plains into the northern great lakes region
friday through sunday. a warm front will lift north friday
morning and winds will shift to southerly over the lake. winds
remain light until they turn southwesterly saturday ahead of an
approaching cold front, where gusts may reach 20 knots. winds then
ease and become westerly following the frontal passage saturday
night into sunday. there will be chances for multiple rounds rain
and thunderstorms across the lake from friday night through early
sunday morning.
lmz080-669-671-673-675-777-779-870-872-874-876-878-100915-
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-
843 pm cdt wed jul 9 2025
sheboygan wi to pentwater mi south...
.rest of tonight...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft.
.thursday...north winds 5 to 10 kt becoming northeast. waves 1 to
3 ft.
.thursday night...northeast winds 5 to 10 kt veering to south.
waves 1 to 2 ft.
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft.
.friday night...south winds 10 to 15 kt increasing to 10 to
20 kt. chance of showers and thunderstorms. waves 1 to 3 ft.
.saturday...southwest winds 10 to 20 kt. chance of showers and
thunderstorms. waves 2 to 4 ft.
.saturday night...west winds 10 to 15 kt. chance of showers.
waves 1 to 3 ft.
.sunday...northwest winds 10 to 15 kt becoming southwest. waves
1 to 2 ft.
.monday...west winds 10 to 15 kt becoming south. waves 1 to 2 ft.
$$
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