107
FZUS63 KMKX 250740
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
240 AM CDT Fri Jul 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...

A weak cold front has stalled over the southern quarter of the
lake early this morning. Light northeast winds are in place north
of the front, with south to southwest winds across the far
southern portion of the lake.

This front will lift back north as a weak warm front tonight, with
winds becoming southerly again across the entire lake by Saturday.
Winds will generally remain southerly though mid week next week,
with the exception of the far northern portion of the lake, where
thunderstorm complexes may occasionally result in periods of
northerly winds.

LMZ261-362-364-366-563-565-567-868-251515-
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-
240 AM CDT Fri Jul 25 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Patchy
fog this morning. Waves 1 to 2 ft.
.TONIGHT...Northeast winds 10 to 15 kt veering to southeast 5 to
10 kt. Waves 1 to 2 ft.
.SATURDAY...Southeast winds 5 to 10 kt becoming south 10 to
15 kt. Waves 1 ft or less.
.SATURDAY NIGHT...South winds 5 to 10 kt becoming southwest.
Waves 1 ft or less.
.SUNDAY...Southwest winds 10 to 15 kt. Waves 1 ft or less.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers. Waves
1 to 2 ft.
.TUESDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-251515-
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-
240 AM CDT Fri Jul 25 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Patchy
fog this morning. Slight chance of showers and thunderstorms.
Waves 1 to 2 ft.
.TONIGHT...North winds 10 to 15 kt veering to southeast. Slight
chance of showers and thunderstorms in the evening, then chance
of showers and thunderstorms overnight. Waves 1 to 2 ft.
.SATURDAY...South winds 5 to 10 kt increasing to 10 to 15 kt.
Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY NIGHT...South winds 5 to 10 kt becoming west. Chance of
showers and thunderstorms in the evening, then chance of showers
overnight. Waves 1 ft or less.
.SUNDAY...Southwest winds 5 to 10 kt becoming south 10 to 15 kt.
Waves 1 ft or less.
.SUNDAY NIGHT...South winds 10 to 15 kt becoming southwest. Waves
1 to 2 ft.
.MONDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Waves 1 to 3 ft.

$$

LMZ761-251515-
MAFOR 2510/
MICHIGAN NORTH 12800 11810 11710 11810 11210 11200 11300. Waves 2
feet or less.

MICHIGAN SOUTH 12800 13810 11100 11200 11300. A chance of showers
and thunderstorms early this morning and overnight. Waves 2 feet
or less.

$$


Boxell

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

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