951
FZUS63 KMKX 010803
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
303 AM CDT Tue Sep 1 2026

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...

Light winds, combined with a lingering humid air mass, will
support areas of fog development across Lake Michigan both this
morning and again tonight. Off and on thunderstorms remain
forecast through Wednesday morning as a cold front lingers just to
the north of the open waters. Widespread severe weather isn`t
expected in any thunderstorm activity, though an isolated stronger
cell with hail and gusty winds can`t be entirely ruled out.

Light to modest southerly winds today will shift east-
northeasterly through the second half of the week as 30.1 inch
high pressure builds over the Hudson Bay and broad, 29.6 inch low
pressure moves into the northern Great Plains. An unsettled
pattern featuring multiple additional thunderstorm chances will
continue through at least Friday night. Similar to earlier week
storms, widespread severe weather isn`t anticipated, though
isolated stronger storms with hail and gusty winds are possible.

LMZ261-362-364-366-563-565-567-868-011530-
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-
303 AM CDT Tue Sep 1 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 5 to 10 kt veering to south late this
morning, then increasing to 10 to 15 kt early this afternoon
becoming south 10 to 15 kt late. Patchy dense fog. Waves 1 to
3 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest 5 to 10 kt.
Slight chance of showers and thunderstorms overnight. Waves 1 to
2 ft.
.WEDNESDAY...West winds 5 to 10 kt veering to north 10 to 15 kt.
Chance of showers. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...North winds 5 to 10 kt becoming northeast.
Waves 1 ft or less.
.THURSDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 ft or less.
.THURSDAY NIGHT...Northeast winds 10 to 15 kt diminishing to 5 to
10 kt. Chance of showers. Waves nearly calm.
.FRIDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Chance of showers. Waves 1 ft or less.
.SATURDAY...East winds 10 to 15 kt becoming northeast. Waves 1 to
2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-011530-
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-
303 AM CDT Tue Sep 1 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...West winds 5 to 10 kt becoming south 10 to 15 kt. Patchy
fog this morning. Slight chance of showers and thunderstorms this
afternoon. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest 5 to 10 kt.
Slight chance of showers and thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds 5 to 10 kt becoming south 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 15 kt veering to
northwest. Chance of showers. Waves 1 to 2 ft.
.THURSDAY...North winds 5 to 10 kt increasing to 10 to 15 kt.
Chance of showers. Waves 1 to 2 ft.
.THURSDAY NIGHT...Northeast winds 5 to 10 kt becoming east.
Chance of showers. Waves 1 to 2 ft.
.FRIDAY...East winds 10 to 15 kt becoming northeast. Chance of
showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY...East winds 10 to 15 kt becoming northeast. Waves 1 to
2 ft.

$$

LMZ761-011530-
MAFOR 0110/
MICHIGAN NORTH 11800 19804 11300 19304 11410 11410 19414 11410
12510 11500. Waves 2 feet or less.

MICHIGAN SOUTH 11600 11500 11510 12410 13510. Waves 2 feet or
less.

$$


DDV

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

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