529
FZUS63 KMKX 221350
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
850 AM CDT Tue Apr 22 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...

Lighter westerly winds early this morning from a high pressure
around 30.1 inches passing south of Lake Michigan will turn more
southeasterly through the day. Expect a low pressure around 29.7
inches to meander along the ND/MN border and will see
southeasterly winds gradually increase across Lake Michigan
through the late afternoon/evening as the associated warm front
lifts northward. However, expecting this warm front to stall out
across southern third of Lake Michigan dividing more easterly
winds across the northern two-thirds of the Lake overnight into
Wednesday with more southerly winds across the southern third.
Expecting periodic shower and thunderstorm chances along the
stalled frontal boundary during this time as well. Winds will
remain fairly light through Wednesday as the low pressure to the
north weakens as it lifts northward into central Canada. Expecting
to see the stall front to gradually wash out into Thursday as
high pressure builds across the Upper Great Lakes. Winds look to
be variable through the end of the week before gradually
increasing into Friday as another weak surface low works it way
across the Midwest from the Plains.

LMZ261-362-364-366-563-565-567-868-222115-
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-
850 AM CDT Tue Apr 22 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 10 to 20 kt backing to southeast
10 to 15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TONIGHT...East winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Chance of rain showers in the afternoon. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Waves 1 to 3 ft.
.THURSDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Chance of rain showers. Waves 1 to 2 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt. Chance of rain
showers. Waves 2 to 4 ft.
.FRIDAY...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Rain showers likely. Waves 3 to 5 ft.
.SATURDAY...Northeast winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-222115-
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-
850 AM CDT Tue Apr 22 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...South winds 10 to 15 kt becoming southeast.
Slight chance of rain showers through mid morning, then chance of
rain showers this afternoon. Waves 1 to 3 ft.
.TONIGHT...Southeast winds 10 to 20 kt becoming south 10 to 15 kt
late in the evening, then becoming southwest 5 to 10 kt after
midnight becoming west late. Slight chance of rain showers
overnight. Waves 1 to 3 ft.
.WEDNESDAY...South winds 5 to 10 kt becoming southeast. Chance of
rain showers. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 kt becoming south
5 to 10 kt. Chance of rain showers in the evening. Waves 1 to
2 ft.
.THURSDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 to 2 ft building to 1 to 3 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt becoming east.
Chance of rain showers. Waves 2 to 4 ft.
.FRIDAY...East winds 10 to 20 kt becoming north 15 to 25 kt. Rain
showers likely. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.

$$

LMZ761-222115-
MAFOR 2216/
MICHIGAN NORTH 12410 11310 11200 13210 11310. Waves 2 feet or
less.

MICHIGAN SOUTH 14310 11510 12600 11400. A chance of showers this
afternoon and Wednesday morning. Waves 2 feet or less.

$$


Kuroski

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

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