538
FZUS63 KMKX 210759
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
259 AM 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...

Westerly winds behind the exiting low pressure system early this
morning will become southeasterly as a warm front from the next
incoming low pressure system moves northward. The incoming deepening
low pressure around 29.4 inches will advance northeast across
northern Wisconsin traversing the northern Great Lakes Region as
it heads toward Canada. Stronger south to southwesterly winds
will persist as the low lifts into the Upper Great Lakes region
through Wednesday before weakening heading into the end of the
week. There continues to be the potential for periods of
thunderstorms over the lake, especially southern portions Tuesday
into Wednesday morning.

LMZ261-362-364-366-563-565-567-868-211515-
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-
259 AM CDT Tue May 21 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 5 to 10 kt becoming east late this
morning, then becoming east 5 to 10 kt early this afternoon
increasing to 10 to 20 kt late. Patchy fog this morning. Isolated
showers and thunderstorms this afternoon. Waves 1 to 2 ft.
.TONIGHT...East winds to 30 kt veering to south. Scattered
showers and thunderstorms. Waves 2 to 4 ft building to 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY NIGHT...Southwest winds to 30 kt diminishing to 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 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 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.
.SATURDAY...South winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211515-
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-
259 AM CDT Tue May 21 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...East winds 5 to 10 kt becoming southeast late this
morning, then increasing to 10 to 15 kt early this afternoon
increasing to 10 to 20 kt late. Areas of fog this morning. Waves
1 to 2 ft building to 1 to 3 ft.
.TONIGHT...Southeast winds to 30 kt becoming southwest. Scattered
thunderstorms with isolated showers in the evening, then
scattered showers and thunderstorms overnight. Waves 3 to 5 ft
building to 6 to 9 ft occasionally to 12 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 becoming west
10 to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 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
thunderstorms. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 1 to 3 ft.

$$

LMZ761-211515-
MAFOR 2110/
MICHIGAN NORTH 11800 12200 11210 11230 11350 19359 11346 19349
11440 19449. Waves 1 foot or less today. Waves 2 to 4 feet
building to 5 to 9 feet tonight.

MICHIGAN SOUTH 11103 11203 11310 11320 11330 11450 19459 11456
19459 11540. Waves 1 to 3 feet today. Waves 2 to 4 feet building
to 6 to 9 feet tonight.

$$


Patterson

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

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