499
FZUS63 KMKX 111340
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
840 AM CDT Tue Mar 11 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...

Breezy north winds expected this morning, with a brief burst of
gusty northeast winds for areas just behind a backdoor cold front
(which is currently approaching the southern end of the lake, moving
south). Gusts remain just below gale force behind this front, then
gradually subside into the afternoon.

Winds then gradually weaken through the rest of today, as high
pressure around 30.0 inches moves across the Western Great Lakes
region. The high will quickly move east of the region tonight, with
winds shifting east to southeast for Wednesday. Winds will weaken
further Wednesday night into Thursday, with high pressure around
30.3 inches well east of the region.

Strong low pressure around 29.0 inches is expected to develop in the
Central Plains Friday, then shift northeast into Minnesota on
Saturday. Expect increasing south to southeast winds across Lake
Michigan Friday into Friday night, with gusty south to southwest
winds on Saturday.

LMZ261-362-364-366-563-565-567-868-112115-
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-
840 AM CDT Tue Mar 11 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east. Waves 3 to
5 ft subsiding to 1 to 3 ft.
.WEDNESDAY...East winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft.
.WEDNESDAY NIGHT...East winds 10 to 15 kt veering to south. Waves
1 to 2 ft.
.THURSDAY...Southeast winds 5 to 10 kt. Waves 1 ft or less.
.THURSDAY NIGHT...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.FRIDAY...Southeast winds 15 to 25 kt. Waves 3 to 5 ft building
to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...Southeast winds to 30 kt becoming south. Rain likely.
Waves 8 to 11 ft occasionally to 14 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-112115-
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-
840 AM CDT Tue Mar 11 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds to 30 kt becoming north. For far
southern areas of the lake, gusty north to northeast winds at
near gale force over the next several hours, subsiding thereafter.
Waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft.
.TONIGHT...North winds 15 to 25 kt becoming east 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY...East winds 15 to 25 kt diminishing to 10 to 20 kt
early in the afternoon, then becoming northeast 10 to 15 kt late.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 kt. Waves 1 to 3 ft
subsiding to 1 ft or less.
.THURSDAY...East winds 5 to 10 kt becoming northeast. Waves 1 to
2 ft.
.THURSDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.FRIDAY...Southeast winds 15 to 25 kt. Waves 3 to 5 ft building
to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...South gales to 35 kt. Chance of rain. Waves 8 to
11 ft occasionally to 14 ft.

$$

LMZ761-112115-
MAFOR 1116/
MICHIGAN NORTH 11840 11830 11120 11110 12210 11220 11320. Waves 5
to 8 feet subsiding to 3 to 6 feet this afternoon. Waves 3 to 5
feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet
Wednesday morning.

MICHIGAN SOUTH 12840 11830 12120 12220 11230. Waves 6 to 9 feet
this afternoon. Waves 5 to 8 feet subsiding to 2 to 4 feet
tonight. Waves 2 to 4 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