637
FZUS63 KMKX 030902
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
302 AM CST Tue Mar 3 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...

Winds will continue to weaken today into tonight across Lake
Michigan, as weak high pressure around 30.3 inches develops over
the area. An upper disturbance crossing the region this morning
may bring light rain and light freezing rain or drizzle to the
southern half of Lake Michigan.

Light south to southwesterly winds will continue across the
northern half of Lake Michigan into Wednesday, while winds shift
out of the east further south in response to developing low
pressure around 29.9 inches in the middle Mississippi River
Valley. This low will likely pass just to the south of Lake
Michigan Wednesday night into Thursday, allowing for east to
northeast winds to become established.

Rain showers will spread north across the open waters in response
to the passing low pressure system later Wednesday night through
Thursday. A few thunderstorms are possible over far southern Lake
Michigan Thursday.

Low pressure around 29.5 inches remains forecast to develop in
the central Great Plains Thursday night, and is expected to be
somewhere between the Upper Mississippi River Valley and northern
Wisconsin by Friday evening. This low will move near or just
north of northern Lake Michigan later Friday night into Saturday
morning, quickly moving into Quebec by Saturday evening.

South to southwest winds will thus steadily increase ahead of the
developing and approaching low Friday afternoon into Saturday
morning, ultimately veering westerly Saturday afternoon. Winds
will be gusty at times during this period, with a few gales
possible Friday night into Saturday morning. Widespread rain and
embedded thunderstorms will accompany the approaching and passing
low Friday through Saturday.

LMZ261-362-364-366-563-565-567-868-031630-
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-
302 AM CST Tue Mar 3 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...South winds 10 to 15 kt becoming southwest. Waves 1 to
3 ft subsiding to 1 to 2 ft.
.TONIGHT...Southwest winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds 5 to 10 kt becoming south. Waves
1 ft or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 kt becoming east.
Waves 1 ft or less.
.THURSDAY...East winds 10 to 20 kt becoming northeast. Chance of
rain. Waves 2 to 4 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt becoming east.
Waves 2 to 4 ft.
.FRIDAY...Southeast winds 10 to 15 kt. Rain. Waves 1 to 3 ft
building to 3 to 5 ft.
.SATURDAY...Southwest winds to 30 kt becoming west 10 to 20 kt.
Chance of rain. Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-031630-
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-
302 AM CST Tue Mar 3 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 5 to 10 kt backing to northeast. Slight
chance of rain and light freezing rain this morning, then slight
chance of rain this afternoon. Waves 1 to 2 ft.
.TONIGHT...Northeast winds 5 to 10 kt. Waves 1 ft or less.
.WEDNESDAY...East winds 5 to 10 kt. Waves 1 ft or less.
.WEDNESDAY NIGHT...East winds 5 to 10 kt. Chance of rain
overnight. Waves 1 to 2 ft.
.THURSDAY...East winds 10 to 15 kt. Rain likely. Waves 1 to 3 ft.
.THURSDAY NIGHT...North winds 10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...Southeast winds 10 to 20 kt becoming south. Chance of
rain. Waves 1 to 3 ft building to 3 to 5 ft.
.SATURDAY...Southwest winds to 30 kt becoming west 10 to 20 kt.
Chance of rain. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 5 to 8 ft occasionally to 10 ft.

$$

LMZ761-031630-
MAFOR 0311/
MICHIGAN NORTH 12410 13510 12500 11600. Waves 1 to 3 feet
subsiding to 1 foot or less today. Waves 1 foot or less tonight.

MICHIGAN SOUTH 13300 13100 12800. Waves 2 feet or less.

$$
Wood

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

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