085
FZUS63 KMKX 302233
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
533 PM CDT Sun Mar 30 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 across southern Lake
Michigan this afternoon, and reach Lake Huron by midnight. Brief
periods of dense fog may occur over the southern portion of the
lake as the low passes. Brisk northeast winds will prevail over
the northern portion of the lake this afternoon, with breezy
southerly winds over the far south. After the low passes, brisk
north to northwest winds will extend from north to south across
the lake tonight and well into Monday. A few gale force gusts are
possible in the north. Lighter winds are then expected Monday
night into Tuesday morning as high pressure moves across the lake.

LMZ261-362-364-366-563-565-567-868-310900-
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-
533 PM CDT Sun Mar 30 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds to 30 kt. Patchy fog this evening. Light
sleet, scattered rain showers and freezing rain this evening,
then snow showers, numerous rain showers and freezing rain
overnight. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY...North winds to 30 kt diminishing to 15 to 25 kt. Waves
6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...North winds 15 to 25 kt becoming northeast 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.TUESDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...East winds 15 to 25 kt becoming southeast to
30 kt. Chance of snow. Waves 3 to 5 ft building to 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...East gales to 40 kt becoming southeast gales to
35 kt. Rain. Waves 8 to 11 ft occasionally to 14 ft.
.WEDNESDAY NIGHT...Southeast gales to 35 kt becoming southwest to
30 kt. Chance of rain. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...Southwest winds to 30 kt becoming west. Waves 4 to
7 ft occasionally to 9 ft.
.FRIDAY...North winds 10 to 20 kt becoming northwest 10 to 15 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-310900-
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-
533 PM CDT Sun Mar 30 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...West winds 15 to 25 kt becoming northwest to 30 kt.
Scattered rain showers with isolated thunderstorms this evening,
then numerous rain showers with isolated snow showers overnight.
damaging winds and large hail this evening. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...North winds to 30 kt diminishing to 15 to 25 kt. Waves
6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...North winds 15 to 25 kt becoming northeast 10 to
15 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.TUESDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft.
.TUESDAY NIGHT...East winds to 30 kt. Chance of rain and snow in
the evening, then rain overnight. Waves 4 to 6 ft occasionally to
8 ft building to 8 to 11 ft occasionally to 14 ft.
.WEDNESDAY...Southeast winds to 30 kt. Rain in the morning, then
rain with a chance of thunderstorms in the afternoon. Waves 8 to
12 ft occasionally to 16 ft.
.WEDNESDAY NIGHT...Southwest winds to 30 kt diminishing to 15 to
25 kt. Chance of rain. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY...North winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ872-874-876-878-310900-
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-
533 PM CDT Sun Mar 30 2025

WILMETTE HARBOR IL TO ST. JOSEPH MI SOUTH TO ROCK ISLAND PASSAGE
TO CHARLEVOIX MI...

...SEVERE THUNDERSTORM WATCH 73 IN EFFECT UNTIL 8 PM CDT THIS
EVENING...

.TONIGHT...West winds 15 to 25 kt becoming northwest to 30 kt.
Areas of dense fog this evening. Scattered rain showers and
thunderstorms this evening, then scattered rain and snow showers
overnight.  with damaging winds and large hail. Waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.MONDAY...North winds to 30 kt diminishing to 15 to 25 kt. Waves
6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt late in the evening, then becoming northeast after midnight
diminishing to 10 to 15 kt late. Waves 5 to 8 ft occasionally to
10 ft subsiding to 3 to 5 ft.
.TUESDAY...East winds 10 to 15 kt. Waves 2 to 4 ft.
.TUESDAY NIGHT...East winds 15 to 25 kt increasing to 30 kt
overnight. Rain likely overnight. Waves 3 to 5 ft building to
6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...Southeast winds to 30 kt. Rain in the morning, then
rain with a chance of thunderstorms in the afternoon. Waves 7 to
10 ft occasionally to 13 ft.
.WEDNESDAY NIGHT...Southwest winds to 30 kt diminishing to 15 to
25 kt. Chance of rain. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.FRIDAY...North winds 10 to 15 kt. Waves 1 to 3 ft.

$$
LMZ761-310900-
MAFOR 3107 AMD/
MICHIGAN NORTH 11847 11840 19847 11840 14830. A slight chance of
light freezing rain overnight. Waves 4 to 7 feet building to 6 to
9 feet overnight. Waves 5 to 9 feet subsiding to 4 to 7 feet
Monday. Waves 3 to 5 feet Monday evening.

MICHIGAN SOUTH 11747 19746 11840 14830 11820. Waves 4 to 7 feet
building to 6 to 9 feet overnight. Waves 6 to 9 feet Monday.
Waves 5 to 8 feet subsiding to 3 to 6 feet Monday evening.

$$


WFO MKX

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

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