338
FZUS63 KMKX 220010 AAA
GLFLM

OPEN LAKE FORECAST for Lake Michigan...UPDATED
National Weather Service Milwaukee/Sullivan WI
710 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.

Widespread thunderstorms are expected to move across the lake
tonight, and may contain damaging winds.

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.

LMZ261-362-364-366-563-565-567-868-220315-
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-
710 PM CDT Tue May 21 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...East winds to 30 kt becoming south gales to 35 kt.
Isolated showers and thunderstorms this evening, then scattered
showers and thunderstorms overnight. Waves 4 to 6 ft occasionally
to 8 ft building to 8 to 11 ft occasionally to 14 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 6 to 9 ft occasionally to
12 ft.
.WEDNESDAY NIGHT...Southwest winds to 30 kt diminishing to 10 to
20 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to
5 ft.
.THURSDAY...Southwest winds 15 to 25 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 2 to 4 ft.
.FRIDAY...East winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY NIGHT...Southeast winds 10 to 20 kt veering to southwest.
Showers likely with a chance of thunderstorms. Waves 2 to 4 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest 15 to
25 kt. Waves 2 to 4 ft.
.SUNDAY...West winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220315-
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-
710 PM CDT Tue May 21 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Southeast winds to 30 kt becoming southwest. Numerous
showers and scattered thunderstorms this evening, then scattered
showers and thunderstorms overnight. Waves 4 to 7 ft occasionally
to 9 ft building to 7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...Southwest winds to 30 kt diminishing to 15 to 25 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 3 to 5 ft subsiding to 1 to 3 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.THURSDAY NIGHT...Southeast winds 10 to 15 kt becoming south 5 to
10 kt. Waves 2 to 4 ft.
.FRIDAY...Southeast winds 10 to 20 kt. Chance of showers and
thunderstorms in the afternoon. Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt becoming west. Chance of
showers and thunderstorms. Waves 2 to 4 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.
.SUNDAY...Southeast winds 10 to 15 kt becoming east. Waves 1 to
3 ft.

$$

LMZ761-220315-
MAFOR 2201 AMD/
MICHIGAN NORTH 11346 19349 11356 19359 11450 19459 11450 13540.
Waves 3 to 6 feet building to 7 to 10 feet tonight. Waves 7 to 10
feet subsiding to 5 to 8 feet Wednesday.

MICHIGAN SOUTH 11440 19449 11450 19459 12540 13530. Waves 3 to 6
feet building to 6 to 10 feet tonight. Waves 6 to 9 feet
subsiding to 3 to 6 feet Wednesday.

$$
Wood

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

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