780
FZUS63 KMKX 220813
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
313 AM CDT Sun Sep 22 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...

Expect southerly winds increase through the evening as low
pressure around 29.7 inches lifts from MN to Ontario, which will
in turn drag a cold front across WI and Lake Michigan this morning.
Showers and thunderstorms will develop ahead of and along the
cold front. Southwesterly winds will become northerly behind this
front tonight into Monday. Given the strong cold air moving over
the warmer lake waters, expecting to see gusty northerly winds
during this timeframe. Gusts up to 30 knots and an occasional
gale force gust cannot be ruled out, especially for the southern
portions of Lake Michigan. Will see winds weaken a bit for Monday
as high pressure builds in across the Great Lakes region, but the
northerly component will persist through the start of the week.

LMZ261-362-364-366-563-565-567-868-221515-
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-
313 AM CDT Sun Sep 22 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds 10 to 15 kt veering to northwest 15 to
25 kt late this morning, then becoming north early this afternoon
increasing to 30 kt late. Showers likely with a chance of
thunderstorms this morning, then chance of showers and
thunderstorms this afternoon. Waves 1 to 2 ft building to 4 to
7 ft occasionally to 9 ft.
.TONIGHT...North winds to 30 kt diminishing to 15 to 25 kt.
Slight chance of showers in the evening. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...Northeast winds 10 to 20 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TUESDAY...East winds 10 to 15 kt becoming northeast. Chance of
showers in the afternoon. Waves 1 to 3 ft.
.TUESDAY NIGHT...Northeast winds 10 to 20 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.THURSDAY...Northeast winds 10 to 15 kt. Waves 1 ft or less.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221515-
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-
313 AM CDT Sun Sep 22 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt
late this morning, then becoming west 15 to 25 kt early this
afternoon becoming northwest to 30 kt late. Chance of showers and
thunderstorms this morning, then showers with a chance of
thunderstorms this afternoon. Waves 1 to 3 ft building to 4 to
7 ft occasionally to 9 ft.
.TONIGHT...North winds to 30 kt diminishing to 15 to 25 kt.
Chance of showers and slight chance of thunderstorms in the
evening. Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY...Northeast winds 15 to 25 kt becoming north 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 3 to 5 ft.
.TUESDAY...East winds 10 to 15 kt becoming northeast. Chance of
showers. Waves 2 to 4 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.WEDNESDAY...North winds 10 to 15 kt. Waves 1 to 3 ft.
.THURSDAY...Northeast winds 10 to 15 kt. Waves 1 to 2 ft.

$$

LMZ761-221515-
MAFOR 2210/
MICHIGAN NORTH 11410 11726 11836 11846 12840 12830. A chance of
thunderstorms today. Waves 1 to 3 feet building to 4 to 7 feet
today. Waves 5 to 8 feet tonight.

MICHIGAN SOUTH 11410 11526 11626 11746 11846 13840. A chance of
thunderstorms today. Waves 2 feet or less building to 4 to 7 feet
today. Waves 5 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