412
FZUS63 KMKX 070310
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
910 PM CST Thu Nov 6 2025

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 29.5 inches over northern Minnesota will
progress eastward into Lake Superior overnight, bringing strong
south to southwest winds to Lake Michigan. A Gale Warning is in
effect for the open waters through early Friday morning.

A cold front will cross the lake into early Friday morning,
shifting winds to westerly and bringing gusts to 30 knots at
times. Low pressure will strengthen to 29.3 inches over Ontario
Friday, bringing brisk northwest to north winds through Friday
night.

An additional low pressure system around 29.8 inches develops
over the northern Plains into Friday night, progressing southeast
into west central Illinois Saturday. North to northwest gales may
develop later Saturday night into Sunday across the southern half
of the open waters, as this low strengthens to around 29.6 inches
over Illinois. Northwest to north winds remain gusty into
Monday, with some gales possible. Winds become southwesterly into
Tuesday, as low pressure moves across Ontario. Gales are possible
once again on Tuesday.

LMZ261-362-364-366-563-565-567-868-071030-
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-
910 PM CST Thu Nov 6 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT UNTIL 6 AM CST FRIDAY...

.REST OF TONIGHT...South winds to 30 kt increasing to gales to
40 kt late this evening, then becoming south gales to 40 kt after
midnight becoming southwest gales to 35 kt late. Scattered rain
showers through early evening, then rain showers overnight. Waves
5 to 8 ft occasionally to 10 ft building to 8 to 12 ft
occasionally to 16 ft.
.FRIDAY...Southwest winds to 30 kt becoming northwest. Isolated
rain showers. Waves 8 to 11 ft occasionally to 14 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...North winds to 30 kt diminishing to 10 to 20 kt.
Chance of rain showers in the evening. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SATURDAY...North winds 10 to 15 kt. Chance of rain and snow in
the afternoon. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.SATURDAY NIGHT...North winds 15 to 25 kt increasing to 30 kt.
Snow and rain likely in the evening, then chance of snow
overnight. Waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft.
.SUNDAY...North winds to 30 kt increasing to gales to 35 kt. Snow
likely. Waves 7 to 10 ft occasionally to 13 ft building to 8 to
11 ft occasionally to 14 ft.
.SUNDAY NIGHT...North gales to 35 kt. Snow likely. Waves 8 to
12 ft occasionally to 16 ft.
.MONDAY...North winds to 30 kt becoming northwest. Snow showers
likely. Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to
9 ft occasionally to 12 ft.
.TUESDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Chance of rain showers. Waves 6 to 9 ft occasionally to 12 ft
building to 8 to 12 ft occasionally to 16 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-071030-
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-
910 PM CST Thu Nov 6 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT UNTIL 6 AM CST FRIDAY...

.REST OF TONIGHT...South winds to 30 kt increasing to gales to
40 kt late this evening, then becoming south gales to 40 kt after
midnight becoming southwest late. Isolated showers through early
evening, then showers overnight. Waves 5 to 8 ft occasionally to
10 ft building to 8 to 12 ft occasionally to 16 ft.
.FRIDAY...Southwest winds to 30 kt becoming west. Scattered
showers in the afternoon. Waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Chance of rain showers in the evening, then chance of rain
overnight. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.SATURDAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Rain likely in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Northeast winds to 30 kt becoming north gales
to 35 kt. Rain in the evening, then rain and snow likely
overnight. Waves 4 to 6 ft occasionally to 8 ft building to 8 to
11 ft occasionally to 14 ft.
.SUNDAY...North gales to 35 kt becoming northwest gales to 40 kt.
Rain and snow likely in the morning, then snow likely in the
afternoon. Waves 10 to 14 ft occasionally to 18 ft.
.SUNDAY NIGHT...North gales to 40 kt. Snow likely. Waves 12 to
16 ft occasionally to 21 ft.
.MONDAY...Northwest gales to 35 kt. Chance of snow showers. Waves
10 to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft
occasionally to 16 ft.
.TUESDAY...Southwest gales to 40 kt. Waves 8 to 11 ft
occasionally to 14 ft building to 10 to 14 ft occasionally to
18 ft.

$$

LMZ761-071030-
MAFOR 0705/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11456 11556 11540 19546
11630 11730 12740 11840. Waves 7 to 11 feet overnight. Waves 7 to
10 feet subsiding to 3 to 6 feet Friday. Waves 4 to 7 feet Friday
evening.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11456 11556 11540 13630
11740 11730. Waves 7 to 11 feet overnight. Waves 6 to 10 feet
subsiding to 5 to 8 feet Friday. Waves 4 to 7 feet Friday
evening.

$$
Wood

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

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