331
FZUS63 KMKX 150222
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
922 PM CDT Wed May 14 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...

Dense fog is expected at times through Thursday afternoon, as a
moist airmass lingers over the chilly waters of Lake Michigan. The
Dense Fog Advisory covers all open waters of the lake until 7 PM
CDT Thursday.

Winds will remain light and somewhat variable into tonight, due
to a weak pressure gradient between developing low pressure
around 29.2 inches just east of the Rockies and exiting high
pressure centered over the Atlantic Ocean.

South to southeast winds will then increase on Thursday, as low
pressure lifts through the Northern Plains while deepening to 28.9
inches. While breezy at times, winds are expected to remain well
below gale force, due to warmer air over the cold lake.
Thunderstorms will be likely along a cold front Thursday evening.
A few strong to severe storms with large hail will be possible.
Winds turn southwest behind the front.

Low pressure will then move through northern Minnesota and
northwest Wisconsin Friday, while weakening a bit to around 29.2
inches. Winds will remain southerly over the open waters. Could
see gusts approach gale force over the western shoreline areas,
ahead of the main cold front Friday afternoon. An additional
round of thunderstorms will be possible with this secondary front,
with a few strong to severe storms possible again, especially
across the south half of the lake.

Breezy westerly winds are likely Saturday behind the cold front,
as low pressure passes by to the north. Winds veer north Saturday
night into Sunday, as high pressure builds in north of the region.

LMZ261-362-364-366-563-565-567-868-150930-
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-
922 PM CDT Wed May 14 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 PM CDT THURSDAY...

.REST OF TONIGHT...East winds 10 to 20 kt diminishing to 10 to
15 kt. Widespread dense fog. Slight chance of rain showers and
thunderstorms late this evening, then slight chance of rain
showers overnight. Waves 1 to 2 ft.
.THURSDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Widespread dense fog in the morning, then patchy dense fog in the
afternoon. Waves 1 to 3 ft.
.THURSDAY NIGHT...East winds 15 to 25 kt veering to south 10 to
20 kt. Patchy fog. Showers and thunderstorms in the evening, then
chance of showers and thunderstorms overnight. Waves 3 to 5 ft.
.FRIDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to
10 ft.
.FRIDAY NIGHT...South winds 15 to 25 kt becoming southwest 10 to
20 kt. Chance of rain showers. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...West winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain showers in the morning. Waves 3 to 5 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt becoming north 15 to
25 kt. Waves 2 to 4 ft.
.SUNDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.
.MONDAY...Northeast winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-150930-
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-
922 PM CDT Wed May 14 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 PM CDT THURSDAY...

.REST OF TONIGHT...East winds 5 to 10 kt increasing to 10 to
15 kt. Widespread dense fog. Waves 1 ft or less.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 15 to
25 kt. Widespread dense fog in the morning, then patchy dense fog
in the afternoon. Waves 1 to 2 ft building to 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 15 to 25 kt becoming southwest
10 to 20 kt. Chance of showers and thunderstorms in the evening.
Waves 3 to 5 ft.
.FRIDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to
10 ft.
.FRIDAY NIGHT...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of showers and thunderstorms in the evening, then
chance of showers overnight. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...West winds 15 to 25 kt. Waves 3 to 5 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming north.
Waves 3 to 5 ft.
.SUNDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.MONDAY...Northeast winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-150930-
MAFOR 1504/
MICHIGAN NORTH 13214 12310 19314 11220 11230 11339. Waves 2 feet
or less overnight. Waves 1 to 3 feet Thursday. Waves 2 to 4 feet
Thursday evening.

MICHIGAN SOUTH 11204 11214 11314 11310 19314 11320 19324 11320
11330 11430. A chance of showers and thunderstorms Thursday
evening. Waves 1 foot or less overnight. Waves 1 to 3 feet
building to 2 to 4 feet Thursday. Waves 2 to 4 feet Thursday
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