099
FZUS63 KMKX 101952
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
252 PM CDT Mon Aug 10 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...

The stationary front remains over the far southern portion of the
lake with light and variable winds due to high pressure around
30.0 inches sitting north of a frontal boundary that is parked
over the Corn Belt. Otherwise an unsettled weather pattern has set
up over the Upper Great Lakes for the start of this week where
weak waves of low pressure will cross the region and produce
rounds of thunderstorms at times, primarily over the southern half
of Lake Michigan. A few strong storms are expected over the
southern 2/3 of the lake tonight and again Tuesday late morning
to early afternoon.

LMZ261-362-364-366-563-565-567-868-110315-
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-
252 PM CDT Mon Aug 10 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southeast winds 10 to 15 kt becoming east. Waves 1 ft
or less.
.TUESDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 ft
or less.
.TUESDAY NIGHT...East winds 5 to 10 kt. Waves 1 ft or less.
.WEDNESDAY...Northeast winds 5 to 10 kt backing to west 10 to
15 kt. Waves 1 ft or less.
.WEDNESDAY NIGHT...North winds 10 to 15 kt. Waves nearly calm.
.THURSDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Waves 1 to 3 ft.
.FRIDAY...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft.
.SATURDAY...Southeast winds 15 to 25 kt becoming south. Chance of
showers. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-110315-
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-
252 PM CDT Mon Aug 10 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 5 to 10 kt becoming east. Chance of
showers and thunderstorms this evening, then slight chance of
showers and thunderstorms overnight. Patchy fog overnight. Waves
1 ft or less.
.TUESDAY...East winds 5 to 10 kt becoming south. Slight chance of
showers and thunderstorms in the morning, then chance of showers
and slight chance of thunderstorms in the afternoon. Waves 1 to
2 ft.
.TUESDAY NIGHT...Southeast winds 5 to 10 kt. Patchy fog
overnight. Waves 1 ft or less.
.WEDNESDAY...Southeast winds 5 to 10 kt backing to north 10 to
15 kt. Patchy fog in the morning. Waves 1 ft or less.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt. Waves 1 ft or
less.
.THURSDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Waves 1 to 3 ft building to 2 to 4 ft.
.FRIDAY...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.SATURDAY...Southeast winds 15 to 25 kt becoming south. Chance of
showers and thunderstorms. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-110315-
MAFOR 1022/
MICHIGAN NORTH 11310 11200 11100 12200 11300 11400 11200. Waves 1
foot or less.

MICHIGAN SOUTH 11100 14200 12310 11410. A chance of showers and
thunderstorms this evening. A chance of showers Tuesday
afternoon. Waves 1 foot or less.

$$


Cronce

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

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