575
FZUS63 KMKX 060734
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
234 AM CDT Sun Apr 6 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...

Winds will briefly shift out of the west-southwest this morning and
afternoon, when low pressure of 29.9 inches is forecast to
develop over the Upper Peninsula of Michigan. The low will
progress across the northern open waters this evening as it
deepens to near 29.7 inches, moving into the Lower Peninsula of
Michigan by daybreak Monday. Winds will shift out of the north to
northwest behind the passing surface low late tonight through
Monday, becoming gusty by late Monday morning. Widespread gusts
between 25-30 knots are forecast through Monday afternoon, with
periods of gale force gusts possible. Confidence in gales is
highest across the southern half of the open waters, where a Gale
Watch has been issued between 10 AM and 7 PM CDT Monday. Periods
of snow will accompany the passing low, particularly tonight
through the first half of Monday morning. A few areas of light
freezing spray are possible late Monday afternoon into Monday
evening, particularly across the northern half of Lake Michigan.
Gusts will taper Monday night as 30.2 inch high pressure moves
into the western Great Lakes.

LMZ261-362-364-366-563-565-061530-
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-
234 AM CDT Sun Apr 6 2025

TWO RIVERS WI TO MANISTEE MI NORTH...

.TODAY...West winds 10 to 15 kt becoming southwest late this
morning, then increasing to 15 to 25 kt early this afternoon
becoming south to 30 kt late. Waves 1 to 2 ft building to 3 to
5 ft.
.TONIGHT...South winds 15 to 25 kt backing to northeast 10 to
15 kt late in the evening, then increasing to 10 to 20 kt after
midnight increasing to 15 to 25 kt late. Chance of rain and snow
showers in the evening, then snow showers likely overnight. Waves
4 to 6 ft occasionally to 8 ft.
.MONDAY...North winds to 30 kt. A few gale force gusts to 35 kt
possible. Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY NIGHT...North winds to 30 kt. A few gale force gusts to 35
kt possible during the early evening. Waves 6 to 9 ft
occasionally to 12 ft.
.TUESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt becoming south 10 to
15 kt. Waves 1 to 3 ft.
.WEDNESDAY...South winds 10 to 20 kt. Waves 2 to 4 ft building to
3 to 5 ft.
.THURSDAY...East winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 2 to 4 ft.

$$

LMZ567-868-061530-
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-
234 AM CDT Sun Apr 6 2025

TWO RIVERS WI TO MANISTEE MI SOUTH TO SHEBOYGAN WI TO PENTWATER
MI...

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
EVENING...

.TODAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt
late this morning, then becoming south 15 to 25 kt this
afternoon. Waves 1 to 2 ft building to 3 to 5 ft.
.TONIGHT...South winds 15 to 25 kt diminishing to 10 to 15 kt
late in the evening, then becoming east 10 to 20 kt after
midnight backing to north 15 to 25 kt late. Chance of snow
showers overnight. Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY...North winds to 30 kt increasing to gales to 35 kt.
Chance of snow showers in the morning. Waves 5 to 8 ft
occasionally to 10 ft building to 8 to 11 ft occasionally to
14 ft.
.MONDAY NIGHT...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.
.TUESDAY NIGHT...South winds 10 to 15 kt. Waves 1 to 3 ft.
.WEDNESDAY...South winds 10 to 20 kt. Waves 2 to 4 ft building to
4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Chance of rain showers. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-061530-
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-
234 AM CDT Sun Apr 6 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
EVENING...

.TODAY...North winds 10 to 20 kt backing to south 15 to 25 kt.
Waves 2 to 4 ft.
.TONIGHT...South winds 15 to 25 kt veering to west. Chance of
snow showers and slight chance of rain showers overnight. Waves
4 to 6 ft occasionally to 8 ft.
.MONDAY...Northwest winds to 30 kt becoming north gales to 35 kt.
Chance of snow showers in the morning. Waves 5 to 8 ft
occasionally to 10 ft building to 10 to 14 ft occasionally to
18 ft.
.MONDAY NIGHT...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.TUESDAY...Northwest winds 10 to 20 kt becoming north. Waves 4 to
7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.TUESDAY NIGHT...East winds 10 to 15 kt becoming south. Waves
2 to 4 ft.
.WEDNESDAY...South winds 10 to 20 kt becoming southeast. Chance
of rain showers. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north. Chance of
rain showers. Waves 2 to 4 ft.

$$

LMZ761-061530-
MAFOR 0610/
MICHIGAN NORTH 12610 11520 11530 11430 11210 11127 11137. A
chance of rain showers this evening. Waves 1 to 3 feet building
to 2 to 4 feet today. Waves 3 to 5 feet tonight.

MICHIGAN SOUTH 11820 11810 11620 11530 11430 11410 11510 11530. A
chance of snow showers overnight. Waves 1 to 3 feet today. Waves
2 to 4 feet tonight.

$$


Quigley

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

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