447
FZUS63 KMKX 231449
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
849 AM CST Sun Feb 23 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...

High pressure around 30.1 inches is situated over north central
Ontario, with low pressure around 29.4 inches positioned further
west over Alberta. Both features will progress eastward today,
with the Alberta low deepening to around 29.0 inches as it reaches
the Ontario and Manitoba border this evening.

The approach of the surface low will allow southwest winds to
strengthen over the open waters this afternoon and evening. The
low will continue to deepen to around 28.9 inches tonight, as it
progresses across the southern shores of Hudson Bay. This will
allow southwest gusts to increase further across the open waters.

Widespread gusts to around 30 knots are forecast across Lake
Michigan between midnight tonight and middle morning on Monday. A
few gale force gusts are possible over the northern third of the
open waters. Conditions are not currently expected to be
widespread enough to warrant Gale Warning. Gusts will gradually
taper Monday afternoon and evening, as high pressure around 29.8
inches builds into the Canadian Great Plains.

LMZ261-362-364-366-563-565-567-868-232230-
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-
849 AM CST Sun Feb 23 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southwest winds 5 to 10 kt becoming south 10 to
20 kt. Chance of sprinkles and flurries through mid morning, then
chance of sprinkles and slight chance of snow this afternoon.
Waves 2 to 4 ft.
.TONIGHT...South winds 10 to 20 kt becoming southwest to 30 kt.
Chance of rain overnight. Waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft.
.MONDAY...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.MONDAY NIGHT...West winds 10 to 20 kt becoming northwest 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TUESDAY...Northwest winds 10 to 15 kt becoming west. Waves 1 to
2 ft.
.TUESDAY NIGHT...South winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY...South winds 10 to 15 kt veering to northwest. Chance
of rain and snow. Waves 2 to 4 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232230-
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-
849 AM CST Sun Feb 23 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Chance of sprinkles and flurries through mid morning, then
chance of sprinkles this afternoon. Waves 2 to 4 ft.
.TONIGHT...South winds 10 to 20 kt becoming southwest to 30 kt.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY...Southwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.MONDAY NIGHT...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of rain. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TUESDAY...Northwest winds 10 to 15 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY...South winds 10 to 20 kt veering to west. Rain
likely. Waves 2 to 4 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-232230-
MAFOR 2317/
MICHIGAN NORTH 13420 11430 11440 13540. A chance of rain
overnight. Waves 1 to 3 feet this afternoon. Waves 2 to 4 feet
building to 5 to 8 feet tonight. Waves 5 to 9 feet Monday
morning.

MICHIGAN SOUTH 14420 12530 11540 11530. Waves 1 to 3 feet this
afternoon. Waves 1 to 3 feet building to 3 to 6 feet tonight.
Waves 5 to 8 feet Monday morning.

$$
Wood

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

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