456
FZUS63 KMKX 070258
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
858 PM CST Fri Mar 6 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...

Low pressure around 29.6 inches centered over Iowa will track
northeastward across Wisconsin and the Upper Peninsula of
Michigan through the overnight hours, deepening to 29.5 inches.
Southwesterly winds will prevail ahead of this low through the
overnight hours, with one last round of showers and thunderstorms
crossing the lake after midnight. Light to modest winds and milder
temps will also create conditions favorable for marine fog to
develop at times this evening into Saturday morning. Thus a Marine
Dense Fog Advisory is in effect for periodic drops in visibilities
to less than 1 nm at times. The low will drag a cold front across
the Upper Great Lakes into Saturday morning. Will see breezy west
to northwesterly winds behind the front and usher out the marine
fog by late Saturday morning. Westerly winds will prevail through
Saturday night before increasing and turning more southwesterly
for Sunday into Monday as a series of two low pressure systems
develop and track north of Lake Michigan through this time frame.
Cannot rule out a brief potential for Gales Sunday and Monday for
the northern third of the open waters of Lake Michigan.

LMZ261-362-364-366-563-565-567-868-071015-
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-
858 PM CST Fri Mar 6 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST SATURDAY...

.REST OF TONIGHT...South winds 10 to 20 kt increasing to 30 kt.
Widespread dense fog. Chance of rain showers and thunderstorms
through early evening, then rain showers with a chance of
thunderstorms overnight. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.SATURDAY...Southwest winds to 30 kt veering to northwest 15 to
25 kt. Patchy dense fog in the morning, then patchy fog in the
afternoon. Chance of rain showers and slight chance of
thunderstorms in the morning, then slight chance of rain showers
in the afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west 10 to
15 kt late in the evening, then becoming southwest 10 to 20 kt
after midnight increasing to 30 kt late. Waves 3 to 5 ft building
to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...Southwest gales to 35 kt diminishing to 30 kt. Waves
7 to 10 ft occasionally to 13 ft.
.SUNDAY NIGHT...Southwest winds to 30 kt increasing to gales to
35 kt. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY...Southwest gales to 35 kt diminishing to 15 to 25 kt in
the afternoon. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...North winds 10 to 20 kt becoming northeast 15 to
25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.
.TUESDAY...Northeast winds 15 to 25 kt increasing to 30 kt.
Chance of rain. Waves 5 to 8 ft occasionally to 10 ft building to
7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...Northeast winds to 30 kt becoming north 15 to 25 kt.
Chance of rain, snow and light freezing rain. Waves 8 to 12 ft
occasionally to 16 ft subsiding to 7 to 10 ft occasionally to
13 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-071015-
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-
858 PM CST Fri Mar 6 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST SATURDAY...

.REST OF TONIGHT...South winds 10 to 20 kt increasing to 30 kt.
Widespread dense fog. Chance of rain showers and thunderstorms
through early evening, then rain showers with a chance of
thunderstorms overnight. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.SATURDAY...South winds to 30 kt becoming southwest late in the
morning, then becoming west 15 to 25 kt early in the afternoon
diminishing to 10 to 20 kt late. Patchy dense fog in the morning.
Chance of rain showers and slight chance of thunderstorms in the
morning. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.SATURDAY NIGHT...West winds 10 to 20 kt becoming southwest 15 to
25 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.SUNDAY...Southwest winds to 30 kt. Waves 5 to 8 ft occasionally
to 10 ft.
.SUNDAY NIGHT...Southwest winds to 30 kt. Waves 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.
.MONDAY NIGHT...Northwest winds 10 to 20 kt veering to northeast
15 to 25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally
to 9 ft.
.TUESDAY...Northeast winds 15 to 25 kt increasing to 30 kt.
Chance of rain. Waves 5 to 8 ft occasionally to 10 ft building to
8 to 11 ft occasionally to 14 ft.
.WEDNESDAY...North winds to 30 kt. Chance of rain. Waves 8 to
12 ft occasionally to 16 ft subsiding to 8 to 11 ft occasionally
to 14 ft.

$$

LMZ761-071015-
MAFOR 0705/
MICHIGAN NORTH 11436 19434 11446 19444 11544 11534 12730 11720
11610. Waves 2 to 4 feet building to 4 to 7 feet overnight. Waves
5 to 8 feet subsiding to 3 to 5 feet Saturday. Waves 2 to 4 feet
subsiding to 1 to 3 feet Saturday evening. Wave heights are for
ice free areas.

MICHIGAN SOUTH 11434 11436 19434 11444 11540 19544 12630 11620
11610. Waves 3 to 6 feet building to 4 to 7 feet overnight. Waves
5 to 8 feet subsiding to 3 to 6 feet Saturday. Waves 3 to 5 feet
subsiding to 2 to 4 feet Saturday evening.

$$


Sheppard

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

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