313
FZUS63 KMKX 250757
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
257 AM CDT Tue Mar 25 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 30.3 inches over Alberta and the Rocky Mountains
will build into the Midwest by Wednesday morning. Northwest winds
will diminish overnight across the lake. Light northwest winds
will become light and variable tonight through Wednesday.
Thursday, low pressure around 29.5 inches will approach the Great
Lakes Region from the northern plains. Winds will shift to the
southwest to west and be light to moderate.

A trough of weak low pressure will extend from a Northern Plains
low of around 29.4 inches to Ohio Thursday night. Look for
increasing easterly winds Friday. The trough will lift to the
center of Lake Michigan Saturday morning and remain fairly
stationary through Sunday as low pressure of around 29.5 inches
crosses southern WI. Winds will be east to northeast north of this
trough/front and southerly south to southeast on the other side.
The front will clear southern Lake Michigan by Monday morning with
gusty north winds in its wake.

LMZ261-362-364-366-563-565-567-868-251530-
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-
257 AM CDT Tue Mar 25 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 10 to 20 kt. Chance of snow this
morning, then slight chance of snow this afternoon. Waves 2 to
4 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming north 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt increasing to
15 to 25 kt. Waves 1 to 3 ft building to 2 to 4 ft.
.THURSDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 2 to 4 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt becoming east.
Waves 1 to 3 ft.
.FRIDAY...East winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain and snow. Waves 3 to 5 ft.
.SATURDAY...East winds to 30 kt. Rain likely. Waves 4 to 7 ft
occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-251530-
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-
257 AM CDT Tue Mar 25 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 10 to 20 kt becoming north. Waves 2 to
4 ft.
.TONIGHT...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY...Northeast winds 5 to 10 kt becoming east 10 to 15 kt
late in the morning, then becoming southeast early in the
afternoon and increasing to 10 to 20 kt late. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Waves 1 to 3 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...Southeast winds 10 to 20 kt. Chance of rain. Waves 3 to
5 ft.
.SATURDAY...Southeast winds 15 to 25 kt. Rain likely. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ761-251530-
MAFOR 2510/
MICHIGAN NORTH 14720 11720 11820 12810. A chance of snow this
morning. Waves 2 to 4 feet subsiding to 1 to 3 feet today. Waves
1 to 3 feet tonight.

MICHIGAN SOUTH 13720 12820 11810 12710. Waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet today.
Waves 1 to 3 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