National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FZUS63 KMKX 220809
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
309 AM CDT Mon Apr 22 2024

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 29.4 inches will move from southern Manitoba
today and into Lake Superior tonight. South to southwest winds
will gradually increase during this period, with a few gale force
gusts possible tonight.

The low will then shift across Lake Huron Tuesday, and into the
New England region Tuesday night into Wednesday. The low will
bring a cold front southeast across Lake Michigan later Tuesday
into Tuesday night. Southwest winds Tuesday will shift north
behind the front into Tuesday night, with some gales possible.
Building waves are also anticipated.

High pressure around 30.5 inches will then build into eastern
Ontario on Wednesday, with gusty north winds over Lake Michigan
gradually subsiding. Light east winds Wednesday night will become
southeast on Thursday, as the high shifts east.

Gusty winds and building waves may return Friday and through the
upcoming weekend, as low pressure moves through the region.

LMZ261-362-364-366-563-565-567-868-221530-
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-
309 AM CDT Mon Apr 22 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds 10 to 20 kt becoming south to 30 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...South winds to 30 kt becoming southwest. Chance of
rain showers. Waves 4 to 6 ft occasionally to 8 ft building to 5
to 8 ft occasionally to 10 ft.
.TUESDAY...Southwest winds 15 to 25 kt becoming northwest to
30 kt. Rain showers likely in the afternoon. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.TUESDAY NIGHT...North winds to 30 kt. Chance of rain showers in
the evening. Waves 7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...Northeast winds to 30 kt diminishing to 10 to 20 kt
in the afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 kt veering to
southeast 5 to 10 kt. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY...Southeast winds to 30 kt. Chance of rain showers. Waves
4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221530-
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-
309 AM CDT Mon Apr 22 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southwest winds 10 to 15 kt increasing to 10 to 20 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 becoming southwest to 30 kt.
Chance of rain showers in the evening, then slight chance of rain
showers overnight. Waves 4 to 6 ft occasionally to 8 ft building
to 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Showers likely in the afternoon. Waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...Northwest gales to 35 kt becoming north. Chance
of rain showers in the evening. Waves 7 to 10 ft occasionally to
13 ft building to 8 to 11 ft occasionally to 14 ft.
.WEDNESDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt becoming east 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.FRIDAY...Southeast winds to 30 kt. Chance of rain showers. Waves
4 to 7 ft occasionally to 9 ft.

$$

LMZ761-221530-
MAFOR 2210/
MICHIGAN NORTH 11520 11530 11430 13440 11446 11540. Waves 1 to 3
feet building to 3 to 5 feet today. Waves 3 to 6 feet building to
5 to 8 feet tonight.

MICHIGAN SOUTH 12510 13430 12440 11540. A chance of showers this
evening. Waves 1 to 3 feet building to 3 to 5 feet today. Waves 3
to 6 feet building to 6 to 9 feet tonight.

$$
Wood

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

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