720
FZUS63 KMKX 200750
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
250 AM CDT Mon May 20 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...

Southeast winds this morning will become more southerly by this
afternoon as a weak area of low pressure around 29.7 inches
tracks over WI and Lake Michigan. Expect to see more west to
southwesterly component of the winds briefly overnight tonight.
Winds will turn more south to southeasterly again Tuesday. Breezy
southerly winds are expected as a deepening low pressure around
29.4 inches approaches the Upper Great Lakes Region and tracks
northeast into Wednesday. There looks to be periods of
thunderstorms over the lake, especially southern Portions Monday
through Wednesday morning.

LMZ261-362-364-366-563-565-567-868-201515-
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-
250 AM CDT Mon May 20 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southeast winds 10 to 15 kt becoming south 10 to 20 kt.
Chance of showers and slight chance of thunderstorms this
morning, then chance of showers and thunderstorms this afternoon.
Waves 1 to 3 ft.
.TONIGHT...Southwest winds 10 to 20 kt diminishing to 10 to 15 kt
late in the evening, then veering to northwest after midnight
diminishing to 5 to 10 kt late. Chance of showers and
thunderstorms in the evening, then slight chance of showers and
thunderstorms overnight. Waves 1 to 3 ft.
.TUESDAY...North winds 5 to 10 kt becoming northeast late in the
morning, then becoming east 10 to 15 kt early in the afternoon
increasing to 10 to 20 kt late. Waves 1 to 2 ft.
.TUESDAY NIGHT...Southeast winds to 30 kt becoming south. Showers
with a chance of thunderstorms. Waves 3 to 5 ft building to 6 to
9 ft occasionally to 12 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.WEDNESDAY NIGHT...West winds to 30 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.
.THURSDAY...West winds to 30 kt becoming southwest 15 to 25 kt.
Waves 2 to 4 ft.
.FRIDAY...Northeast winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
250 AM CDT Mon May 20 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 10 to 15 kt becoming south 10 to 20 kt.
Slight chance of showers and thunderstorms this morning, then
chance of showers and thunderstorms this afternoon. Waves 1 to
3 ft.
.TONIGHT...Southwest winds 10 to 20 kt diminishing to 5 to 10 kt.
Chance of showers and thunderstorms in the evening, then slight
chance of showers and thunderstorms overnight. Waves 1 to 3 ft.
.TUESDAY...Southeast winds 5 to 10 kt increasing to 10 to 20 kt.
Chance of showers in the morning. Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds to 30 kt. Showers likely with a
chance of thunderstorms in the evening, then chance of 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 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY NIGHT...West winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.
.FRIDAY...East winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ761-201515-
MAFOR 2010/
MICHIGAN NORTH 13310 11320 11426 11410 11610 11710. A chance of
thunderstorms this afternoon and evening. Waves 1 to 3 feet.

MICHIGAN SOUTH 12310 11320 11420 11426 11520 12510. A chance of
thunderstorms this afternoon and evening. Waves 1 to 3 feet.

$$


Patterson

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

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