331
FZUS63 KMKX 141343
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
843 AM CDT Mon Sep 14 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...

North winds will remain light and variable this morning as high
pressure around 30.3 inches moves across the lake. Low pressure
around 29.3 inches then moves from southern Manitoba through
northern Ontario today through Tuesday morning, bringing
increasing south-southeast winds this afternoon through tonight
and southerly winds into Tuesday. Gales are expected tonight into
Tuesday morning, and a Gale Warning is in effect. Periods of
thunderstorms will affect the Lake Monday evening into Tuesday as
well. Winds finally shift north-northeast Tuesday night into
Wednesday as high pressure around 30.3 inches builds
southeastward through the Upper Midwest. Winds remain north-
northeast through Thursday before shifting southerly by Friday.

LMZ261-362-364-563-142115-
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 Rock Island Passage to Sturgeon Bay WI-
843 AM CDT Mon Sep 14 2026

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH TUESDAY
AFTERNOON...

.REST OF TODAY...Northwest winds 5 to 10 kt backing to southwest
late this morning, then becoming south 10 to 15 kt early this
afternoon increasing to 10 to 20 kt late. Waves 1 ft or less
building to 1 to 3 ft.
.TONIGHT...South winds to 30 kt increasing to gales to 40 kt.
Showers likely in the evening, then showers and slight chance of
thunderstorms overnight. Waves 4 to 6 ft occasionally to 8 ft
building to 12 to 16 ft occasionally to 21 ft.
.TUESDAY...South gales to 40 kt becoming west gales to 35 kt.
Chance of showers in the morning. Waves 12 to 16 ft occasionally
to 21 ft subsiding to 6 to 9 ft occasionally to 12 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt becoming north 10 to
15 kt overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.
.WEDNESDAY...Northeast winds 5 to 10 kt becoming east. Waves 1 to
2 ft.
.WEDNESDAY NIGHT...East winds 10 to 15 kt. Chance of showers.
Waves 1 ft or less.
.THURSDAY...Northeast winds 10 to 15 kt becoming north. Waves
1 ft or less.
.FRIDAY...Southeast winds 10 to 15 kt becoming south. Chance of
showers. Waves 1 ft or less.

$$

LMZ366-565-567-868-142115-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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-
843 AM CDT Mon Sep 14 2026

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH TUESDAY
MORNING...

.REST OF TODAY...Northeast winds 5 to 10 kt veering to southeast
late this morning, then becoming south 10 to 20 kt early this
afternoon increasing to 15 to 25 kt late. Waves 1 to 3 ft
building to 3 to 5 ft.
.TONIGHT...South winds to 30 kt increasing to gales to 40 kt.
Chance of showers in the evening, then showers and slight chance
of thunderstorms overnight. Waves 4 to 7 ft occasionally to 9 ft
building to 12 to 16 ft occasionally to 21 ft.
.TUESDAY...South gales to 40 kt becoming southwest to 30 kt, then
becoming west 15 to 25 kt late. Chance of showers in the morning.
Waves 12 to 16 ft occasionally to 21 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.TUESDAY NIGHT...Northwest winds 10 to 20 kt veering to
northeast. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming east.
Showers likely. Waves 1 to 2 ft.
.THURSDAY...Northeast winds 10 to 15 kt. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 10 to 15 kt. Chance of showers. Waves
1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-142115-
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-
843 AM CDT Mon Sep 14 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH TUESDAY
MORNING...

.REST OF TODAY...East winds 10 to 15 kt becoming southeast late
this morning, then increasing to 10 to 20 kt early this afternoon
increasing to 15 to 25 kt late. Waves 2 to 4 ft building to 3 to
5 ft.
.TONIGHT...Southeast winds to 30 kt becoming south gales to
40 kt. Chance of showers and thunderstorms overnight. Waves 4 to
7 ft occasionally to 9 ft building to 12 to 16 ft occasionally to
21 ft.
.TUESDAY...Southwest gales to 35 kt diminishing to 15 to 25 kt.
Chance of showers. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 5 to 8 ft occasionally to 10 ft.
.TUESDAY NIGHT...Northwest winds 10 to 20 kt becoming north.
Chance of showers. Waves 3 to 5 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...East winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.
.THURSDAY...Northeast winds 10 to 15 kt becoming north. Chance of
showers. Waves 1 to 3 ft.
.FRIDAY...East winds 10 to 15 kt. Chance of showers. Waves 1 to
3 ft.

$$

LMZ761-142115-
MAFOR 1416/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11410 11430 11440 11450
12456 11450 11550. Waves 2 feet or less building to 2 to 4 feet
this afternoon. Waves 4 to 7 feet building to 10 to 15 feet
tonight. Waves 10 to 15 feet Tuesday morning.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11320 11330 11340 11350
11450 12456 11556. A chance of thunderstorms overnight. Waves 1
to 3 feet building to 3 to 5 feet this afternoon. Waves 4 to 7
feet building to 10 to 14 feet tonight. Waves 9 to 13 feet
Tuesday morning.

$$


Wagner

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

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