689
FZUS63 KMKX 190202
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
902 PM CDT Wed Jun 18 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...

Low pressure around 29.7 inches over to the southern tip of Lake
Michigan will continue to track across Michigan into southern
Lake Huron late tonight. Will see breezy north to northwest wind
shift through the evening and overnight. Expect lighter northerly
winds Thursday morning as low pushes further east then will back
to southwesterly for Thursday afternoon into Friday. Will continue
to see stronger southerly winds through the weekend as a deepening
low pressure develops over the Dakotas and slowly move into the
Upper Midwest early next week.

LMZ261-362-364-366-563-565-567-868-190930-
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-
902 PM CDT Wed Jun 18 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming north.
Patchy fog. Chance of showers and slight chance of thunderstorms.
Waves 1 to 3 ft.
.THURSDAY...Northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. Patchy fog in the morning. Chance of showers and
slight chance of thunderstorms. Waves 1 to 2 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Chance of showers. Waves 1 to 2 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Waves 1 to
3 ft building to 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers and thunderstorms. Waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...South winds to 30 kt. Chance of showers and
thunderstorms in the morning. Waves 6 to 9 ft occasionally to
12 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft.
.SUNDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
6 ft occasionally to 8 ft.
.MONDAY...Southwest winds to 30 kt becoming south 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190930-
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-
902 PM CDT Wed Jun 18 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...North winds 10 to 20 kt becoming northwest.
Patchy fog. Showers likely with a chance of thunderstorms through
early evening, then chance of showers and slight chance of
thunderstorms overnight. Waves 3 to 5 ft.
.THURSDAY...Northwest winds 10 to 20 kt backing to southwest
10 to 15 kt. Chance of showers and slight chance of thunderstorms
in the morning. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Waves 1 to
3 ft building to 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.
.SATURDAY...South winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming south 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-190930-
MAFOR 1904/
MICHIGAN NORTH 11820 11810 12710 11610 11520 12510. A chance of
showers. Waves 2 feet or less.

MICHIGAN SOUTH 14720 11610 12510 11500. A chance of showers
overnight and Thursday morning. Waves 1 to 3 feet building to 2
to 4 feet overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet
Thursday. Waves 1 to 2 feet Thursday evening.

$$


Wagner

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

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