389
FZUS63 KMKX 251449
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
849 AM CST Tue Nov 25 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...

Light and variable winds (predominantly southeasterly) will
persist through today as low pressure around 29.6 inches
approaches from the Minnesota/Iowa border. This low pressure is
expected to cross the Upper Peninsula of Michigan through
Wednesday, deepening to around 29.3 inches. A cold front extending
south of the low is expected to cross Lake Michigan tonight,
turning winds southwest and steadily increasing toward daybreak on
Wednesday. Gale Warnings are in effect across the lake Wednesday,
along with a Storm Force Wind Watch over the southern two thirds
of the open waters, where we expect the strongest winds. Winds
veer due west by mid Wednesday, then northwest late Wednesday
through Thursday night. Winds are expected to decrease below Storm
Force by daybreak Thursday, but Gale Warnings do remain in effect
Thursday into Thursday night as gusty northwest winds continue.
Winds gradually subside into Friday as high pressure builds into
the region from the west.

LMZ261-362-364-563-252230-
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-
849 AM CST Tue Nov 25 2025

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...

.REST OF TODAY...Southeast winds 5 to 10 kt becoming east 10 to
15 kt. Patchy fog. Chance of drizzle through mid morning, then
drizzle likely this afternoon. Waves 1 to 3 ft.
.TONIGHT...Southeast winds 10 to 15 kt increasing to 10 to 20 kt
late in the evening, then becoming southeast 10 to 20 kt after
midnight becoming south 15 to 25 kt late. Rain likely in the
evening, then rain overnight. Waves 1 to 2 ft building to 4 to
6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt becoming west late in the
morning, then increasing to gales to 40 kt early in the afternoon
becoming northwest gales to 45 kt late. A few gusts to storm force
possible. Rain in the morning, then rain and snow in the
afternoon. Waves 7 to 10 ft occasionally to 13 ft building to 10
to 14 ft occasionally to 18 ft.
.WEDNESDAY NIGHT...Northwest gales to 45 kt, a few gusts to storm
force possible. Snow. Waves 14 to 18 ft occasionally to 23 ft.
.THURSDAY...Northwest gales to 45 kt, decreasing to 40 kt. Snow.
Waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to 12 ft
occasionally to 16 ft.
.THURSDAY NIGHT...Northwest gales to 40 kt. Snow. Waves 8 to 11
ft occasionally to 14 ft.
.FRIDAY...Northwest winds to 30 kt. Chance of snow. Waves 5 to
8 ft occasionally to 10 ft subsiding to 3 to 5 ft.
.SATURDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Chance of snow. Waves 1 to 2 ft building to 1 to 3 ft.

$$

LMZ366-565-567-868-252230-
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-
849 AM CST Tue Nov 25 2025

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

...STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
...GALE WARNING IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY EVENING...

.REST OF TODAY...Southeast winds 5 to 10 kt. Patchy fog. Chance
of drizzle. Waves 1 to 3 ft.
.TONIGHT...Southeast winds 5 to 10 kt becoming south 10 to 20 kt
late in the evening, then increasing to 15 to 25 kt after
midnight becoming southwest to 30 kt late. Chance of rain in the
evening, then rain overnight. Waves 1 to 2 ft building to 5 to
8 ft occasionally to 10 ft.
.WEDNESDAY...Southwest gales to 35 kt becoming west gales to
40 kt late in the morning, then increasing to gales to 45 kt
early in the afternoon becoming northwest storm force winds to
50 kt late. Rain in the morning, then rain and snow in the
afternoon. Waves 12 to 16 ft occasionally to 21 ft building to
15 to 20 ft occasionally to 26 ft.
.WEDNESDAY NIGHT...Northwest storm force winds to 50 kt
diminishing to gales to 45 kt. Snow likely in the evening, then
chance of snow overnight. Waves 18 to 23 ft occasionally to
30 ft.
.THURSDAY...Northwest gales to 45 kt diminishing to gales to
35 kt in the afternoon. Chance of snow. Waves 14 to 18 ft
occasionally to 23 ft subsiding to 10 to 14 ft occasionally to
18 ft.
.THURSDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Chance of snow. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 8 to 12 ft occasionally to 16 ft.
.FRIDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south. Snow
likely. Waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-252230-
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 AM CST Tue Nov 25 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
...GALE WARNING IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY EVENING...

.REST OF TODAY...Southeast winds 5 to 10 kt becoming southwest.
Patchy fog. Chance of rain and drizzle through mid morning, then
slight chance of drizzle this afternoon. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt increasing to 15 to 25 kt late
in the evening, then becoming southwest to 30 kt after midnight
increasing to gales to 35 kt around daybreak. Chance of rain in
the evening, then slight chance of rain overnight. Waves 1 ft or
less building to 8 to 11 ft occasionally to 14 ft.
.WEDNESDAY...West gales to 40 kt increasing to storm force winds
to 50 kt. Rain and snow likely in the morning, then snow in the
afternoon. Waves 12 to 16 ft occasionally to 21 ft building to 20
to 25 ft occasionally to 33 ft.
.WEDNESDAY NIGHT...West storm force winds to 50 kt becoming
northwest. Chance of snow. Waves 25 to 30 ft occasionally to 39
ft.
.THURSDAY...Northwest gales to 45 kt diminishing to gales to
40 kt. Chance of snow. Waves 18 to 23 ft occasionally to 30 ft.
.THURSDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Chance of snow. Waves 14 to 18 ft occasionally to 23 ft.
.FRIDAY...Northwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.SATURDAY...South winds 10 to 20 kt. Snow likely. Waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft.

$$

&&STORM

LMZ761-252230-
MAFOR 2517/
MICHIGAN NORTH 11300 11200 11315 11310 11426 11436 11546 11656.
Waves 2 feet or less this afternoon. Waves 2 feet or less
building to 5 to 8 feet tonight. Waves 10 to 14 feet Wednesday
morning.

MICHIGAN SOUTH 11400 11500 11410 11420 11546 11540 11556 11667.
Waves 2 feet or less this afternoon. Waves 1 foot or less
building to 8 to 11 feet tonight. Waves 12 to 16 feet building to
15 to 19 feet Wednesday morning.

$$


Sheppard

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

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