267
FZUS63 KMKX 091915
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
215 PM CDT Sat May 9 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 29.5 inches east of Lake Superior this
afternoon will move into southern Quebec tonight. Its trailing
cold front will continue to move across Lake Michigan this
afternoon. Westerly winds ahead of the front will veer west to
northwest with the frontal passage. Gusty northwest winds are
expected near the western shoreline this afternoon. A backdoor
cold front will then sag southward across the lake this evening
through tonight, with a period of north to northeast winds behind
it.

High pressure around 30.3 inches is then expected to move from
southern Manitoba on Sunday to over Lake Michigan by Monday
morning. Relatively light and variable winds are expected during
this period. Low pressure around 29.7 inches should then move east
southeast across the region Tuesday, with increasing south to
southeast winds ahead of it, veering west to northwest behind it
for Tuesday night into Wednesday.

LMZ261-362-364-366-563-565-567-868-100315-
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-
215 PM CDT Sat May 9 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Scattered rain showers. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest late in the
morning, then becoming west early in the afternoon becoming north
late. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.MONDAY...Northwest winds 10 to 15 kt backing to south. Waves
1 to 2 ft.
.MONDAY NIGHT...South winds 10 to 15 kt. Waves 1 to 2 ft.
.TUESDAY...South winds to 30 kt. Rain showers. Waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.TUESDAY NIGHT...South winds to 30 kt veering to northwest 15 to
25 kt. Chance of rain showers. Waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northwest winds to 30 kt becoming north. Waves 4 to
7 ft occasionally to 9 ft.
.THURSDAY...North winds 10 to 15 kt backing to southwest. Waves
1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-100315-
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-
215 PM CDT Sat May 9 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...West winds 15 to 25 kt becoming northwest late, then
diminishing to 10 to 20 kt through early evening becoming north
10 to 15 kt late this evening becoming northeast becoming north
5 to 10 kt late. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SUNDAY...North winds 10 to 15 kt veering to east 5 to 10 kt.
Waves 1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 5 to 10 kt. Waves 1 to 2 ft.
.MONDAY...Northeast winds 5 to 10 kt increasing to 10 to 20 kt in
the afternoon. Waves 1 to 2 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming southeast. Waves
1 to 2 ft.
.TUESDAY...South winds to 30 kt. Rain showers. Waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.TUESDAY NIGHT...Southwest winds to 30 kt becoming west 15 to
25 kt. Chance of rain showers. Waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northwest winds to 30 kt becoming north. Waves 5 to
8 ft occasionally to 10 ft.
.THURSDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft subsiding to 1 to 2 ft.

$$

LMZ761-100315-
MAFOR 0922/
MICHIGAN NORTH 11730 11830 11820 11620 12610 11620 11720. Waves 1
to 3 feet tonight. Waves 2 feet or less Sunday.

MICHIGAN SOUTH 11720 12810 11110 11810 11700 11710 11210. Waves 1
to 2 feet.

$$


Gehring

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

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