854
FZUS63 KMKX 220149
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
849 PM CDT Sat Jun 21 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 29.3 inches will move from the Central High
Plains to the eastern Dakotas overnight and Sunday, while a
weaker low around 29.6 inches tracks from Ontario to southeast
Canada. Gusty south winds will continue across the lake, but the
colder water temperatures should limit most gale force gusts from
reaching the surface.

The low over the eastern Dakotas will track northeast into
southwest Ontario Sunday night. The low will help pull a cold
front eastward toward the western Great Lakes region into Monday.
Gusty south to southwest winds will continue during this time.
The front will stall out across the Great Lakes through much of
next week, which should keep winds on the lighter side.

LMZ261-362-364-366-563-565-567-868-220930-
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-
849 PM CDT Sat Jun 21 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds to 30 kt. Slight chance of showers
through early evening. Waves 6 to 9 ft occasionally to 12 ft
subsiding to 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Southwest winds to 30 kt becoming south. Waves 4 to
7 ft occasionally to 9 ft.
.SUNDAY NIGHT...South winds to 30 kt becoming southwest. Waves
4 to 7 ft occasionally to 9 ft.
.MONDAY...Southwest winds to 30 kt becoming south. Waves 4 to
7 ft occasionally to 9 ft.
.MONDAY NIGHT...Southwest winds 15 to 25 kt becoming west 10 to
15 kt overnight. Showers likely with a chance of thunderstorms in
the evening, then showers likely overnight. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.
.TUESDAY...North winds 10 to 15 kt. Chance of showers. Waves 1 to
3 ft.
.TUESDAY NIGHT...Northeast winds 10 to 15 kt. Chance of showers.
Waves 1 to 2 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Showers likely. Waves 1 to 2 ft.
.THURSDAY...East winds 10 to 20 kt. Showers likely. Waves 1 to
2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220930-
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-
849 PM CDT Sat Jun 21 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds to 30 kt diminishing to 15 to
25 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.SUNDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
7 ft occasionally to 9 ft.
.SUNDAY NIGHT...South winds to 30 kt becoming southwest 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming south. Waves 4 to
7 ft occasionally to 9 ft.
.MONDAY NIGHT...Southwest winds 10 to 20 kt. Chance of showers
and thunderstorms in the evening, then chance of showers
overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.TUESDAY...West winds 10 to 15 kt veering to north. Chance of
showers. Waves 1 to 3 ft.
.TUESDAY NIGHT...North winds 10 to 15 kt becoming northwest 5 to
10 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt becoming north. Chance
of showers. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Showers likely with a chance of thunderstorms. Waves 1 to 3 ft.

$$

LMZ761-220930-
MAFOR 2204/
MICHIGAN NORTH 11440 11430 11530 11540 14440. Waves 4 to 7 feet
overnight. Waves 3 to 6 feet Sunday and Sunday evening.

MICHIGAN SOUTH 11440 13430 13440 11430. Waves 4 to 7 feet
subsiding to 3 to 6 feet overnight. Waves 3 to 6 feet Sunday and
Sunday evening.

$$
Wood

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

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