012
FZUS63 KMKX 211938
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
238 PM CDT Tue May 21 2024

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 29.3 inches over western Iowa will deepen to
29.1 inches by early evening just northwest of Minneapolis, then
track to western Ontario by sunrise Wednesday. East to southeast
winds will increase this afternoon as a warm front approaches,
becoming breezy south winds, possibly approaching gale force, as
the front moves northward across the lake this evening. Areas of
dense fog should dissipate by early this evening over the south
half of the lake.

A strong cold front will then veer the winds to southwesterly
late tonight with the breezy winds continuing over the north half
of the lake through Wednesday. Light to modest southwest winds
will then prevail over the entire lake for Wednesday night and
Thursday. Widespread thunderstorms are expected tonight and may
contain strong, damaging winds.

LMZ261-362-364-366-563-565-567-868-220330-
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-
238 PM CDT Tue May 21 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southeast winds to 30 kt veering south. Scattered
thunderstorms with isolated showers this evening, then scattered
showers and thunderstorms overnight. Waves 3 to 5 ft building to 7
to 10 ft occasionally to 13 ft.
.WEDNESDAY...Southwest winds 25 to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 kt diminishing to
10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to
2 to 4 ft.
.THURSDAY...Southwest winds 15 to 25 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt veering to
northeast 10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...Northeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Showers likely with a chance of thunderstorms. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SUNDAY...North winds 10 to 15 kt becoming northeast 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220330-
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-
238 PM CDT Tue May 21 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING...

.TONIGHT...Southeast winds to 30 kt becoming southwest. Scattered
showers and thunderstorms. Waves 4 to 6 ft occasionally to 8 ft
building to 7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.FRIDAY...Southeast winds 10 to 20 kt becoming east. Chance of
showers and thunderstorms in the afternoon. Waves 1 to 3 ft.
.FRIDAY NIGHT...East winds 10 to 20 kt becoming south. Chance of
showers and thunderstorms. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Waves 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ761-220330-
MAFOR 2122/
MICHIGAN NORTH 11230 12346 19349 11440 19449 11540 13540. Waves 1
foot or less building to 6 to 10 feet tonight. Waves 5 to 9 feet
subsiding to 4 to 7 feet Wednesday.

MICHIGAN SOUTH 11330 12440 19449 11540 12530 12520. Waves 1 to 3
feet building to 6 to 9 feet tonight. Waves 5 to 8 feet subsiding
to 2 to 4 feet Wednesday.

$$


Gehring

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

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