915
FZUS63 KMKX 041414
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
914 AM CDT Fri Sep 4 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...

Light and variable winds with periods of showers and thunderstorms
expected through this morning as a frontal boundary remains
stalled across the lake.

High pressure around 30.1 inches builds into the Great Lakes
region from the north this weekend, leading to light northeast to
east winds and predominantly dry weather. Shower and storm
chances return to the forecast midweek next week.

LMZ261-362-364-366-563-565-567-868-042115-
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-
914 AM CDT Fri Sep 4 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southeast winds 10 to 20 kt becoming east.
Scattered showers late this morning. Waves 1 to 2 ft.
.TONIGHT...East winds 10 to 20 kt diminishing to 5 to 10 kt.
Patchy fog overnight. Waves 1 to 2 ft.
.SATURDAY...East winds 10 to 15 kt becoming northeast 10 to
20 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 1 to 2 ft.
.SUNDAY...Southeast winds 5 to 10 kt becoming east 10 to 15 kt.
Waves 1 to 2 ft.
.SUNDAY NIGHT...East winds 5 to 10 kt becoming south. Waves 1 to
2 ft.
.MONDAY...South winds 10 to 15 kt. Waves 1 to 2 ft.
.TUESDAY...South winds to 30 kt increasing to gales to 35 kt.
Chance of showers. Waves 4 to 6 ft occasionally to 8 ft building
to 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-042115-
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-
914 AM CDT Fri Sep 4 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southeast winds 10 to 15 kt becoming south.
Scattered showers with isolated thunderstorms late this morning.
Waves 1 to 2 ft.
.TONIGHT...Southeast winds 5 to 10 kt backing to northeast.
Scattered showers and thunderstorms in the evening, then slight
chance of showers and thunderstorms overnight. Patchy fog
overnight. Waves 1 to 2 ft.
.SATURDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Patchy fog in the morning. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northeast winds 10 to 20 kt becoming east.
Waves 2 to 4 ft.
.SUNDAY...East winds 10 to 15 kt becoming northeast. Waves 2 to
4 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast.
Waves 1 to 3 ft.
.MONDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.
.TUESDAY...Southeast winds 15 to 25 kt becoming south to 30 kt.
Chance of showers. Waves 4 to 6 ft occasionally to 8 ft building
to 4 to 7 ft occasionally to 9 ft.

$$

LMZ761-042115-
MAFOR 0416/
MICHIGAN NORTH 11320 19326 11220 13210 11200 12210. Waves 2 feet
or less.

MICHIGAN SOUTH 11410 19416 11400 11300 11800 19809 11100 19109
11100 12110. Waves 2 feet or less.

$$


Gehring

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

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