316
FZUS63 KMKX 100802
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
302 AM CDT Fri Oct 10 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...

A cold front will progress into the Upper Mississippi River Valley
early this morning, resulting in increasing southerly winds
through late morning across the open waters. Southerlies will
become particularly gusty following sunrise, when widespread 25-30
knot readings are forecast. Gusts will be strongest over the
northern third of Lake Michigan, where a few gales will be
possible between ~7 AM to 1 PM CDT. Any such gusts will be brief,
with conditions not expected to be widespread enough to warrant
Gale Warnings.

The aforementioned cold front will cross the waters this
afternoon, resulting in a northwest wind shift. Showers and
isolated thunderstorms will be possible during the frontal
passage, with severe weather not expected. Breezy north-northwest
winds will continue tonight, gradually tapering during the day
Saturday as 1024 mb high pressure moves across Lake Michigan.
Winds will turn out of the southeast Sunday, when 990 mb low
pressure is forecast to form over the northern Great Plains. The
low will advance toward the Hudson Bay by Monday evening, dragging
a cold front across Lake Michigan in the process. Additional
showers and isolated thunderstorms will accompany the passing
front, with severe weather not expected at this time.

LMZ261-362-364-366-563-565-567-868-101530-
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-
302 AM CDT Fri Oct 10 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds to 30 kt becoming west. A few gale force
gusts up to 35 kt possible. Chance of showers. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.TONIGHT...Northwest winds to 30 kt becoming north 15 to 25 kt.
Chance of showers in the evening, then slight chance of showers
overnight. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.SATURDAY...North winds 10 to 20 kt becoming northeast. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt. Waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft.
.MONDAY...South winds 15 to 25 kt becoming southwest 10 to 20 kt.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-101530-
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-
302 AM CDT Fri Oct 10 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...South winds to 30 kt becoming southwest. Chance of
showers. Waves 6 to 9 ft occasionally to 12 ft.
.TONIGHT...West winds 15 to 25 kt becoming north 10 to 20 kt.
Chance of showers in the evening, then slight chance of showers
overnight. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.
.MONDAY...South winds 10 to 20 kt. Waves 4 to 7 ft occasionally
to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-101530-
MAFOR 1010/
MICHIGAN NORTH 11440 11540 11546 11640 13730 11830. Waves 3 to 6
feet building to 5 to 9 feet today. Waves 4 to 7 feet subsiding
to 3 to 6 feet tonight.

MICHIGAN SOUTH 11430 13540 11630 11730 11830 11820. A chance of
showers. Waves 3 to 5 feet building to 5 to 9 feet today. Waves 4
to 7 feet subsiding to 3 to 6 feet tonight.

$$


Cronce

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes