292
FZUS63 KMKX 171925
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
225 PM CDT Tue Jun 17 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 29.5 inches will move from Ontario into
Quebec this evening. Its cold front extending southward over
eastern Upper Michigan and Wisconsin will weaken and stall as it
moves over Lake Michigan late this afternoon and evening.

Another low pressure area of 29.7 inches will track from northern
Missouri to southern Lake Michigan on Wednesday, followed by a
weak ridge of high pressure by Thursday afternoon.

Expect light to modest southerly winds becoming light and
variable late today and tonight as the front weakens and stalls
over the lake. Variable winds are expected for Wednesday as low
pressure moves across southern Lake Michigan in the afternoon.
Modest north to northwest winds are then forecast in the wake of
the low for Wednesday night into Thursday morning then turning
westerly.

LMZ261-362-364-366-563-565-567-868-180315-
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-
225 PM CDT Tue Jun 17 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southwest winds 10 to 15 kt backing to southeast.
Patchy fog overnight. Slight chance of showers overnight. Waves
1 to 3 ft subsiding to 1 to 2 ft.
.WEDNESDAY...Southeast winds 5 to 10 kt becoming east late in the
morning, then becoming 10 to 20 kt early in the afternoon
becoming northeast late. Patchy fog. Chance of showers and slight
chance of thunderstorms in the morning, then showers with a
chance of thunderstorms in the afternoon. Waves 1 to 2 ft
building to 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 kt becoming north
late in the evening, then becoming northwest 10 to 20 kt after
midnight diminishing to 10 to 15 kt late. Patchy fog in the
evening. Showers likely with a chance of thunderstorms in the
evening. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
2 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt. Chance of showers
and thunderstorms in the evening, then chance of showers
overnight. Waves 1 to 2 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Chance of
showers. Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...South winds to 30 kt. Chance of showers and
thunderstorms. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-180315-
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-
225 PM CDT Tue Jun 17 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 10 to 20 kt becoming southwest 10 to 15 kt
late this evening, then becoming west 5 to 10 kt after midnight
backing to southeast 10 to 15 kt late. Chance of showers and
thunderstorms. Patchy fog overnight. Waves 1 to 2 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt late in the morning, then becoming southeast 10 to 20 kt
early in the afternoon becoming east 15 to 25 kt late. Patchy
fog. Chance of showers and thunderstorms in the morning, then
showers likely with a chance of thunderstorms in the afternoon.
Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 kt diminishing to
10 to 20 kt. Patchy fog in the evening. Chance of showers and
thunderstorms in the evening, then chance of showers overnight.
Waves 3 to 5 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 2 to 4 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.
.FRIDAY NIGHT...South winds 15 to 25 kt increasing to 30 kt.
Chance of showers. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...South winds to 30 kt. Waves 4 to 7 ft occasionally to
9 ft.
.SUNDAY...South winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.

$$

LMZ761-180315-
MAFOR 1722/
MICHIGAN NORTH 11510 11400 13300 11310 11216 11126. A chance of
thunderstorms Wednesday afternoon. Waves 2 feet or less.

MICHIGAN SOUTH 12410 11610 11300 11410 11310 11326 11336. A
chance of thunderstorms. Waves 2 feet or less.

$$


Gehring

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

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