837
FZUS63 KMKX 021455
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
855 AM CST Tue Dec 2 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 around 30.1 inches well to the south of the region
will bring light west winds today, becoming southwest and
increasing by early this evening.

A strong cold front along a low pressure trough around 29.8
inches will then cross Lake Michigan Wednesday. Gusty southwest
winds are expected ahead of this front early Wednesday morning,
with gusty northwest winds behind it Wednesday afternoon and
night. Winds will remain just below gales for most the lake,
though a brief period of low end gales is possible Wednesday night
over the far northern part of the lake. Very cold air with this
system will result in a risk for freezing spray Wednesday night
and Thursday.

Light winds are expected Thursday with the influence of high
pressure around 30.4 inches over Illinois and Indiana. Another
period of elevated southwest winds will occur Thursday night into
Friday, as another low pressure trough around 29.8 inches crosses
the Upper Great Lakes region.

LMZ261-362-364-366-563-565-567-868-022215-
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 AM CST Tue Dec 2 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 5 to 10 kt increasing to 10 to 15 kt
late this morning, then becoming southwest 10 to 20 kt early this
afternoon increasing to 15 to 25 kt late. Waves 1 to 3 ft
building to 3 to 5 ft.
.TONIGHT...Southwest winds 15 to 25 kt increasing to 30 kt. Snow
likely overnight. Waves 4 to 6 ft occasionally to 8 ft building
to 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...West winds to 30 kt becoming northwest. Snow likely
in the morning, then chance of snow in the afternoon. Waves 7 to
10 ft occasionally to 13 ft subsiding to 5 to 8 ft occasionally
to 10 ft.
.WEDNESDAY NIGHT...Northwest winds to 30 kt. A few gales to 35
kt. Freezing spray. Chance of snow. Waves 7 to 10 ft occasionally
to 13 ft.
.THURSDAY...Northwest winds to 30 kt becoming west 15 to 25 kt.
Freezing spray in the morning. Chance of snow in the morning.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds to 30 kt. A few gales to 35 kt.
Freezing spray. Chance of snow. Waves 6 to 9 ft occasionally to
12 ft building to 8 to 11 ft occasionally to 14 ft.
.FRIDAY...Southwest winds to 30 kt. Chance of snow. Waves 8 to
11 ft occasionally to 14 ft.
.SATURDAY...Northwest winds 10 to 20 kt. Chance of snow. Waves
3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-022215-
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 AM CST Tue Dec 2 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds 10 to 15 kt becoming southwest
10 to 20 kt. Patchy dense fog through mid morning. Waves 2 to
4 ft.
.TONIGHT...Southwest winds 10 to 20 kt increasing to 30 kt.
Chance of snow overnight. Waves 2 to 4 ft building to 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...Southwest winds to 30 kt becoming northwest. Snow
likely in the morning, then snow in the afternoon. Waves 8 to
12 ft occasionally to 16 ft subsiding to 6 to 9 ft occasionally
to 12 ft.
.WEDNESDAY NIGHT...Northwest winds to 30 kt. Chance of snow in
the evening. Freezing spray overnight. Waves 8 to 12 ft
occasionally to 16 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west 10 to
20 kt. Freezing spray in the morning. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 4 to 7 ft occasionally to
9 ft.
.THURSDAY NIGHT...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft building to 8 to 11 ft occasionally to
14 ft.
.FRIDAY...Southwest winds to 30 kt. Chance of snow. Waves 8 to
11 ft occasionally to 14 ft.
.SATURDAY...Northwest winds 10 to 20 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.


$$

LMZ761-022215-
MAFOR 0217/
MICHIGAN NORTH 12520 11530 12540 12547 11647. Waves 1 to 3 feet
building to 2 to 4 feet this afternoon. Waves 3 to 6 feet
building to 6 to 9 feet tonight. Waves 6 to 10 feet Wednesday
morning.

MICHIGAN SOUTH 11610 11510 11520 12530 11540 12547. Waves 1 to 3
feet this afternoon. Waves 2 to 4 feet building to 7 to 10 feet
tonight. Waves 9 to 12 feet Wednesday morning.

$$
Wood

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

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