508
FZUS63 KMKX 031500
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
900 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...

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

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 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 as the low pressure system passes. A few
thunderstorms are possible over far southern Lake Michigan
Thursday.

Low pressure around 29.5 inches will develop in the central Plains
Thursday night, and track toward the Upper Mississippi River
Valley by Friday evening. This low will move near or just north
of Lake Michigan later Friday night into Saturday morning,
quickly moving into Quebec by Saturday evening. As the low passes
to the north, south to southwest winds will steadily increase
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.

LMZ261-362-364-366-563-565-567-868-032215-
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-
900 AM CST Tue Mar 3 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...South winds 10 to 15 kt becoming southwest.
Waves 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. Patchy
fog in the morning. 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-032215-
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-
900 AM CST Tue Mar 3 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southeast winds 5 to 10 kt backing to northeast.
Patchy drizzle and light freezing drizzle through mid morning.
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.

$$

LMZ761-032215-
MAFOR 0317/
MICHIGAN NORTH 13510 12500 11600 11500 11400. Waves 2 feet or
less.

MICHIGAN SOUTH 11300 13100 12800 12200. Waves 1 foot or less.

$$


Patterson

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

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