275
FZUS63 KMKX 060145
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
845 PM CDT Fri Jun 5 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...

Broad low pressure of 29.6 inches will move from Lake Superior
into eastern Ontario tonight, bringing a cold front through Lake
Michigan late tonight. Southerly winds this evening will allow for
continued warm air over cold waters and dense marine fog over the
northern half of the lake tonight into Saturday morning. The cold
front from the low pressure will produce storms across the open
waters tonight into early Saturday morning. An isolated waterspout
is possible along the western open waters early tonight. Winds
will shift northwesterly behind the cold front, but will remain
light. Fog will gradually lift through the afternoon hours
Saturday, but may return Saturday night. High pressure around
30.0 inches builds across the region Sunday, bringing lighter and
variable winds through the day. Low pressure develops in the Great
Plains Monday, bringing south-southeasterly winds through at
least midweek. Additional chances for thunderstorms develop Monday
and Tuesday.

LMZ261-362-364-366-563-565-567-868-060915-
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-
845 PM CDT Fri Jun 5 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 1 PM CDT SATURDAY...

.REST OF TONIGHT...Southwest winds 10 to 15 kt becoming west 5 to
10 kt. Areas of dense fog. Chance of showers and thunderstorms
through early evening, then chance of thunderstorms and slight
chance of showers overnight. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.SATURDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Areas of dense fog in the morning, then patchy fog in the
afternoon. Waves 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 15 kt becoming northeast.
Patchy fog in the evening. Waves 1 to 2 ft.
.SUNDAY...Northeast winds 5 to 10 kt increasing to 10 to 20 kt in
the afternoon. Waves 1 to 2 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt becoming southeast. Waves
1 to 2 ft building to 2 to 4 ft.
.MONDAY...Southeast winds 10 to 20 kt becoming east. Waves 2 to
4 ft.
.MONDAY NIGHT...East winds 10 to 20 kt becoming southeast. Chance
of showers. Waves 2 to 4 ft.
.TUESDAY...Southeast winds 10 to 20 kt. Chance of showers. Waves
2 to 4 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 2 ft building to 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-060915-
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-
845 PM CDT Fri Jun 5 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 10 to 20 kt becoming southwest.
Patchy fog. Chance of showers and thunderstorms through early
evening, then chance of showers and slight chance of
thunderstorms overnight. Waves 2 to 4 ft.
.SATURDAY...West winds 10 to 15 kt veering to northeast. Patchy
fog in the morning. Chance of showers and slight chance of
thunderstorms in the morning. Waves 1 to 3 ft subsiding to 1 to
2 ft.
.SATURDAY NIGHT...East winds 5 to 10 kt becoming northeast. Waves
1 ft or less.
.SUNDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY...Southeast winds 10 to 20 kt. Chance of showers in the
afternoon. Waves 2 to 4 ft.
.MONDAY NIGHT...Southeast winds 10 to 20 kt. Showers likely with
a chance of thunderstorms. Waves 2 to 4 ft.
.TUESDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of showers. Waves 2 to 4 ft.
.WEDNESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft building to 1 to 3 ft.

$$

LMZ761-060915-
MAFOR 0604/
MICHIGAN NORTH 11516 11614 11604 11610 19614 11610 11510 11710
11810. A chance of thunderstorms overnight. Waves 1 to 3 feet
overnight. Waves 2 feet or less Saturday and Saturday evening.

MICHIGAN SOUTH 12520 11510 12610 11800 12200. A chance of showers
and thunderstorms late this evening, then a chance of showers
overnight. A chance of showers Saturday morning. Waves 1 to 3
feet overnight. Waves 2 feet or less Saturday and Saturday
evening.

$$


MH

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

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