644
FZUS63 KMKX 091448
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
948 AM CDT Tue Jun 9 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...

No major changes to the going forecast at this time.

Light and variable winds will increase and become northerly by
this evening as low pressure of 29.9 inches crosses the center
part of Lake Michigan. Dense fog is expected at times through
tonight due to a warm and humid airmass over the relatively cool
waters. A Marine Dense Fog Advisory is in effect for central
portions of the lake at this time. An advisory that covers more of
the lake may be needed tonight. There is a chance of showers with
a few rumbles of thunder through tonight as well.

Breezy southerly winds are expected Wednesday and Thursday as
strong low pressure around 29.2 inches tracks from southern
Saskatchewan to Hudson Bay. Multiple rounds of showers and storms
are likely during this time, along with a chance for severe
storms. West to southwest winds and dry weather are then expected
Friday behind the departing low.

LMZ261-362-092115-
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-
948 AM CDT Tue Jun 9 2026

ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH...

.REST OF TODAY...East winds 10 to 15 kt becoming northeast.
Patchy fog. Numerous showers and slight chance of thunderstorms
late this morning, then showers and slight chance of
thunderstorms this afternoon. Waves 1 to 2 ft.
.TONIGHT...Northeast winds 10 to 15 kt becoming northwest. Patchy
fog in the evening, then areas of dense fog overnight. Slight
chance of showers. Waves 1 to 2 ft.
.WEDNESDAY...Northwest winds 5 to 10 kt backing to southwest late
in the morning, then becoming south 10 to 15 kt in the afternoon.
Areas of dense fog in the morning, then patchy dense fog in the
afternoon. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 kt becoming southwest
15 to 25 kt. Showers with a chance of thunderstorms in the
evening, then showers likely overnight. Waves 3 to 5 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming southwest.
Showers with a chance of thunderstorms. Waves 2 to 4 ft.
.FRIDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft.
.SATURDAY...West winds 15 to 25 kt. Waves 2 to 4 ft.

$$

LMZ364-366-563-565-567-868-092115-
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-
948 AM CDT Tue Jun 9 2026

ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TODAY...

.REST OF TODAY...Northeast winds 10 to 15 kt becoming north.
Areas of dense fog. Numerous showers and slight chance of
thunderstorms late this morning, then isolated showers this
afternoon. Waves 1 to 2 ft.
.TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt late
in the evening, then becoming northwest after midnight becoming
west late. Isolated showers in the evening. Patchy dense fog in
the evening, then areas of dense fog overnight. Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds 5 to 10 kt becoming southeast late
in the morning, then becoming south 10 to 20 kt early in the
afternoon increasing to 15 to 25 kt late. Areas of dense fog in
the morning, then patchy dense fog in the afternoon. Waves 1 to
2 ft building to 3 to 5 ft.
.WEDNESDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Showers with a chance of thunderstorms. Waves 4 to 6 ft
occasionally to 8 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt becoming west.
Showers with a chance of thunderstorms. Waves 3 to 5 ft.
.FRIDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest 15 to
25 kt. Waves 2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-092115-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
948 AM CDT Tue Jun 9 2026

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

.REST OF TODAY...Southwest winds 10 to 15 kt becoming west 5 to
10 kt. Patchy fog. Scattered showers late this morning, then
scattered showers and slight chance of thunderstorms this
afternoon. Waves 1 to 2 ft.
.TONIGHT...North winds 5 to 10 kt backing to southwest. Patchy
fog. Scattered showers and slight chance of thunderstorms in the
evening, then slight chance of showers and thunderstorms
overnight. Waves 1 to 2 ft.
.WEDNESDAY...South winds 5 to 10 kt increasing to 10 to 20 kt.
Patchy fog in the morning. Waves 1 to 2 ft building to 3 to 5 ft.
.WEDNESDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Showers with a chance of thunderstorms in the evening, then
showers likely with a chance of thunderstorms overnight. Waves
4 to 6 ft occasionally to 8 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south 15 to
25 kt. Showers likely with a chance of thunderstorms in the
afternoon. Waves 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 15 to 25 kt becoming west.
Showers with a chance of thunderstorms. Waves 3 to 5 ft.
.FRIDAY...West winds 10 to 20 kt. Waves 3 to 5 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ669-870-092115-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
948 AM CDT Tue Jun 9 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI...

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TODAY...

.REST OF TODAY...Southwest winds 5 to 10 kt veering to north
10 to 15 kt. Areas of dense fog. Scattered showers late this
morning, then isolated showers this afternoon. Waves 1 to 2 ft.
.TONIGHT...North winds 5 to 10 kt backing to west. Isolated
showers in the evening. Areas of dense fog. Waves 1 to 2 ft.
.WEDNESDAY...South winds 5 to 10 kt increasing to 15 to 25 kt.
Patchy fog in the morning, then patchy dense fog in the
afternoon. Chance of showers and thunderstorms in the afternoon.
Waves nearly calm building to 3 to 5 ft.
.WEDNESDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Showers with a chance of thunderstorms. Waves 4 to 6 ft
occasionally to 8 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 15 to 25 kt becoming west 10 to
20 kt. Showers with a chance of thunderstorms. Waves 3 to 5 ft.
.FRIDAY...West winds 10 to 20 kt becoming southwest. Waves 3 to
5 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ761-092115-
MAFOR 0916/
MICHIGAN NORTH 11116 19114 11814 11810 19814 11800 11804 11704
11604 11414. Waves 2 feet or less.

MICHIGAN SOUTH 11510 19514 11610 11800 19804 11804 11600 11500
11400 11410. Waves 2 feet or less.

$$


CMiller

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

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