368
FZUS63 KMKX 170136
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
836 PM CDT Mon Jun 16 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...

Low pressure around 29.5 inches will cross western Lake Superior
tonight, and high pressure around 29.8 inches will settle into the
Upper Midwest on Tuesday. Low pressure of 29.6 inches will cross
eastern Iowa Wednesday morning and reach central Lower Michigan
by Wednesday evening while strengthening to 29.4 inches. High
pressure of 30.0 inches will set up over the Plains Thursday,
with the top of the ridge over Lake Superior and northern Lake
Michigan.

Expect increasing southerly winds tonight through Tuesday with
highest gusts over the north half of Lake Michigan. Lighter and
variable conditions will return Wednesday, then become westerly
Thursday. While showers and thunderstorms are possible through
much of the week, the time period with the best chance for
storms is Wednesday afternoon through Thursday morning.

LMZ261-362-364-366-563-565-567-868-170915-
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-
836 PM CDT Mon Jun 16 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Slight chance of showers and thunderstorms overnight.
Waves 2 to 4 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Slight
chance of showers and thunderstorms in the morning. Waves 3 to
5 ft.
.TUESDAY NIGHT...Southwest winds 10 to 15 kt becoming southeast.
Chance of showers overnight. Waves 2 to 4 ft subsiding to 1 to
2 ft.
.WEDNESDAY...Southeast winds 5 to 10 kt becoming east 10 to
15 kt. Chance of showers in the morning, then showers likely in
the afternoon. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 kt becoming north.
Showers likely in the evening, then chance of showers overnight.
Waves 1 to 3 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest. Chance of
showers. Waves 1 to 3 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of showers. Waves 1 to 2 ft.
.FRIDAY...North winds 10 to 15 kt veering to south 10 to 20 kt.
Waves 1 to 3 ft.
.SATURDAY...South winds 15 to 25 kt. Chance of thunderstorms.
Waves 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-170915-
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-
836 PM CDT Mon Jun 16 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southeast winds 10 to 15 kt becoming south
10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south. Slight
chance of showers and thunderstorms. Waves 2 to 4 ft.
.TUESDAY NIGHT...Southwest winds 5 to 10 kt increasing to 10 to
15 kt. Chance of showers and thunderstorms in the evening, then
showers likely overnight. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.WEDNESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Showers in the morning, then showers with a chance of
thunderstorms in the afternoon. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt becoming west.
Showers with a chance of thunderstorms in the evening, then
chance of showers and thunderstorms overnight. Waves 2 to 4 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt becoming west.
Waves 1 to 3 ft.
.FRIDAY...Northwest winds 10 to 15 kt backing to south 10 to
20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 15 to 25 kt. Chance of showers. Waves
4 to 7 ft occasionally to 9 ft.

$$

LMZ761-170915-
MAFOR 1704/
MICHIGAN NORTH 11410 12420 13530 11520 11500. Waves 1 to 3 feet
overnight. Waves 2 to 4 feet Tuesday. Waves 1 to 3 feet Tuesday
evening.

MICHIGAN SOUTH 11410 11420 13520 11420 11410 11500. A chance of
showers and thunderstorms Tuesday evening. Waves 1 to 3 feet
overnight and Tuesday. Waves 2 feet or less Tuesday evening.

$$


Boxell

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

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