155
FZUS63 KMKX 261410
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
910 AM CDT Sun Jul 26 2026

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...

Low pressure around 29.8 inches will remain over Wisconsin and
Lake Michigan through Monday, leading to thunderstorm chances
with severe storms possible this evening into tonight and again
Monday afternoon. Waterspouts and very strong winds are expected
with storms tonight, while winds and hail are the main hazards
expected Monday. Very warm, moist and unstable air flowing over
the relatively cool waters may cause patchy dense fog over the
lake through Monday as well.

Northerly winds will develop Monday night through Wednesday as
high pressure around 29.9 inches builds over the Upper Great Lakes
and a cold front pushes southward. A few gale force gusts are
possible Tuesday afternoon. Look for southerly winds and more
unsettled weather to resume Thursday into next weekend.

LMZ261-362-364-366-563-565-567-868-262115-
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-
910 AM CDT Sun Jul 26 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southwest winds 5 to 10 kt becoming south 10 to
20 kt. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of showers and slight chance of thunderstorms. Waves 1 to
3 ft.
.MONDAY...Southwest winds 10 to 15 kt backing to southeast 10 to
20 kt. Chance of showers and thunderstorms in the afternoon.
Waves 1 to 3 ft.
.MONDAY NIGHT...North winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers and thunderstorms in the evening, then
chance of showers overnight. Waves 2 to 4 ft building to 4 to
6 ft occasionally to 8 ft.
.TUESDAY...North winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY NIGHT...North winds to 30 kt diminishing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.
.WEDNESDAY...North winds 10 to 20 kt increasing to 30 kt. Waves
1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-262115-
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-
910 AM CDT Sun Jul 26 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 5 to 10 kt becoming south 10 to
15 kt early this afternoon, then increasing to 10 to 20 kt late.
Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest. Slight
chance of showers in the evening, then chance of showers and
slight chance of thunderstorms overnight. Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming south. Showers
likely in the morning, then chance of showers in the afternoon.
Waves 1 to 3 ft.
.MONDAY NIGHT...West winds 10 to 20 kt veering to north 15 to
25 kt. Chance of showers and thunderstorms in the evening, then
chance of showers overnight. Waves 2 to 4 ft building to 4 to
7 ft occasionally to 9 ft.
.TUESDAY...North winds to 30 kt increasing to gales to 35 kt.
Waves 6 to 9 ft occasionally to 12 ft building to 8 to 11 ft
occasionally to 14 ft.
.TUESDAY NIGHT...North gales to 35 kt diminishing to 10 to 20 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...North winds 10 to 20 kt increasing to 30 kt. Waves
3 to 5 ft.
.THURSDAY...East winds 10 to 15 kt becoming northeast 10 to
20 kt. Waves 1 to 3 ft.

$$

LMZ761-262115-
MAFOR 2616/
MICHIGAN NORTH 11510 14410 11410 12510. A chance of showers
tonight. Waves 2 feet or less.

MICHIGAN SOUTH 11510 14410 11410 11510 11526. Waves 2 feet or
less this afternoon and tonight. Waves 1 to 3 feet Monday
morning.

$$


MH

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

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