918
FZUS63 KMKX 072157
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
457 PM CDT Mon Apr 7 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 will continue to exit east through tonight over
southern Ontario. Gales are expected to ease over the southern
half of the lake by early evening. Gusty north winds will remain
elevated tonight and overlap with the intrusion of cold air over
the Upper Great Lakes. Moderate Freezing Spray will be possible
over the northern third to northern half of the open waters now
through midnight CDT.

North winds then ease going into Tuesday morning, and become
northwesterly with time. Winds then grow light and variable over
the lake Tuesday afternoon as high pressure of 30.2 moves
southeast over the lake. Moderately breezy south winds then return
Wednesday morning as warm advection moves over the region.

LMZ261-362-364-366-563-565-567-868-080315-
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-
457 PM CDT Mon Apr 7 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds to 30 kt diminishing to 10 to 20 kt.
Freezing spray this evening. Scattered snow showers this evening,
then isolated snow showers overnight. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 4 to 7 ft occasionally to
9 ft.
.TUESDAY...Northwest winds 10 to 20 kt becoming north 10 to
15 kt. Isolated snow showers in the morning, then scattered snow
showers in the afternoon. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.WEDNESDAY...South winds 10 to 20 kt becoming southeast 15 to
25 kt. Chance of snow and rain showers in the morning, then
chance of rain showers in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft building to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...East winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of rain showers. Waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt becoming north
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.SATURDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-080315-
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-
457 PM CDT Mon Apr 7 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

.TONIGHT...North gales to 35 kt diminishing to 10 to 20 kt.
Scattered flurries this evening. Waves 10 to 14 ft occasionally
to 18 ft subsiding to 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Northwest winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.TUESDAY NIGHT...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 2 to 4 ft.
.WEDNESDAY...South winds 10 to 20 kt becoming southeast 15 to
25 kt. Chance of rain and snow showers in the morning, then rain
showers likely in the afternoon. Waves 4 to 6 ft occasionally to
8 ft building to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 kt becoming east
10 to 15 kt. Rain showers likely in the evening, then chance of
rain showers overnight. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Chance of rain showers in the morning. Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft.
.FRIDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...North winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.

$$

LMZ761-080315-
MAFOR 0722/
MICHIGAN NORTH 11841 11841 11830 11820 11720 12710 11710 19717.
Waves 7 to 11 feet subsiding to 3 to 6 feet tonight. Waves 3 to 5
feet subsiding to 1 to 3 feet Tuesday.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11850 11840 11830 11820
13710 11810. Waves 10 to 13 feet subsiding to 5 to 9 feet
tonight. Waves 3 to 6 feet subsiding to 1 to 3 feet Tuesday.

$$


Gehring

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

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