669
FZUS63 KMKX 242035
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
235 PM CST Mon Nov 24 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...

Southerly winds will decrease tonight as the broadened low
pressure around 29.7 inches pushes over the western Great Lakes
region through the day Tuesday. The low will strengthen to 29.6
inches as it tracks across Minnesota Tuesday with the associated
cold front surging across southern Lake Michigan Tuesday night
and lifting through northern Lake Michigan Wednesday as the low
further deepens to 29.3 inches over eastern Lake Superior. The
strong low will generally maintain its strength as it crosses
Ontario Wednesday night and Quebec on Thursday.

Westerly gales will likely develop over southern Lake Michigan
early Wednesday morning and expand into the north half several
hours later. The westerly gales will become northwesterly
Wednesday night and persist into Thursday afternoon before
diminishing. It remains possible for some storm force gusts
Wednesday afternoon and night and thus we cannot rule out
shorter fused Storm Warning. However, a Gale Watch remains in
effect at this time.

Winds will diminish as high pressure of 30.5 inches crosses the
midwest on Friday. Look for southerly winds to develop Sunday as
low pressure develops over the western half of the country. More
gales will bee possible this weekend into early next week.

LMZ261-362-364-366-563-565-567-868-250415-
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-
235 PM CST Mon Nov 24 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

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

.TONIGHT...Southwest winds to 30 kt diminishing to 10 to 15 kt.
Chance of rain. Patchy fog overnight. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 2 to 4 ft.
.TUESDAY...South winds 10 to 15 kt diminishing to 5 to 10 kt.
Chance of rain. Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt late in the evening, then increasing to 15 to 25 kt after
midnight becoming southwest to 30 kt late. Rain. Waves 1 to 2 ft
building to 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...West gales to 45 kt increasing to storm force winds
to 55 kt in the afternoon. Rain in the morning, then rain and
snow in the afternoon. Waves 12 to 16 ft occasionally to 21 ft.
.WEDNESDAY NIGHT...Northwest storm force winds to 55 kt. Snow in
the evening, then chance of snow overnight. Waves 12 to 16 ft
occasionally to 21 ft.
.THURSDAY...Northwest storm force winds to 50 kt diminishing to
gales to 45 kt. Chance of snow. Waves 10 to 14 ft occasionally to
18 ft subsiding to 8 to 11 ft occasionally to 14 ft.
.THURSDAY NIGHT...Northwest gales to 45 kt diminishing to gales
to 40 kt. Chance of snow. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 6 to 9 ft occasionally to 12 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 3 ft building to 4 to 6 ft
occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250415-
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-
235 PM CST Mon Nov 24 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH THURSDAY
EVENING...

.TONIGHT...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of sprinkles and slight chance of rain this evening, then
slight chance of rain overnight. Waves 4 to 6 ft occasionally to
8 ft subsiding to 1 to 3 ft.
.TUESDAY...South winds 10 to 15 kt becoming southwest 5 to 10 kt.
Patchy fog in the morning. Chance of rain in the morning, then
chance of sprinkles and slight chance of rain in the afternoon.
Waves 1 to 3 ft.
.TUESDAY NIGHT...Southwest winds 10 to 15 kt becoming west gales
to 40 kt. Rain. Waves 1 to 2 ft building to 8 to 11 ft
occasionally to 14 ft.
.WEDNESDAY...West gales to 45 kt. Rain and snow in the morning,
then snow in the afternoon. Waves 15 to 20 ft occasionally to
26 ft.
.WEDNESDAY NIGHT...West gales to 45 kt becoming northwest. Chance
of snow. Waves 14 to 18 ft occasionally to 23 ft.
.THURSDAY...Northwest gales to 45 kt diminishing to gales to
40 kt. Chance of snow. Waves 12 to 16 ft occasionally to 21 ft.
.THURSDAY NIGHT...Northwest gales to 40 kt diminishing to 30 kt.
Chance of snow. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 8 to 11 ft occasionally to 14 ft.
.FRIDAY...Northwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 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

LMZ761-250415-
MAFOR 2423/
MICHIGAN NORTH 11540 11530 12510 11410 13400. A chance of rain.
Waves 4 to 7 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3
feet Tuesday.

MICHIGAN SOUTH 11430 11420 13410 11406 11400 11500. Waves 3 to 6
feet subsiding to 1 to 3 feet tonight. Waves 2 feet or less
Tuesday.

$$


Kuroski

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

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