990
FZUS63 KMKX 210758
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
258 AM CDT Sat Sep 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...

Weak high pressure around 29.9 inches is skirting east across
southern Lake Michigan early this morning. This has brought light
winds and patchy fog for the north and east side of the Lake this
morning. As the high pressure pushes further east, expect more
southerly winds increase through the afternoon as low pressure
around 29.5 inches lift northeastward up through MN into Ontario,
which will in turn drag a cold front across WI and Lake Michigan
overnight tonight into Sunday. Expecting to see showers and
thunderstorms to develop along the cold front and track across the
Lake through Sunday. Will then see southwesterly winds turn
northerly behind this front overnight Sunday into Monday. Given
the strong cold air moving over the warmer lake waters, expecting
to see gusty northerly winds during this timeframe with gust up
to 30 knots and a few gale force gusts 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.

LMZ261-362-364-366-563-565-567-868-211515-
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-
258 AM CDT Sat Sep 21 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 5 to 10 kt backing to south. Areas of
dense fog this morning. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest. Slight
chance of showers and thunderstorms in the evening, then chance
of showers and thunderstorms overnight. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming north 15 to 25 kt.
Showers likely with a chance of thunderstorms in the morning,
then showers likely in the afternoon. Waves 1 to 3 ft building to
4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...North winds to 30 kt. Chance of showers. Waves
5 to 8 ft occasionally to 10 ft.
.MONDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TUESDAY...Northeast winds 10 to 15 kt. Waves 1 to 2 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt. Waves 1 to 2 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-
258 AM CDT Sat Sep 21 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 5 to 10 kt backing to southeast. Waves
1 to 2 ft.
.TONIGHT...Southeast winds 10 to 15 kt becoming south. Slight
chance of showers in the evening, then chance of showers and
slight chance of thunderstorms overnight. Waves 1 to 3 ft.
.SUNDAY...Southwest winds 10 to 15 kt becoming west 10 to 20 kt,
then becoming northwest 15 to 25 kt late. Chance of showers and
thunderstorms in the morning, then showers with a chance of
thunderstorms in the afternoon. Waves 2 to 4 ft building to 4 to
6 ft occasionally to 8 ft.
.SUNDAY NIGHT...North winds to 30 kt. Chance of showers. Waves
6 to 9 ft occasionally to 12 ft.
.MONDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TUESDAY...Northeast winds 10 to 15 kt becoming north. Chance of
showers. Waves 1 to 3 ft.
.WEDNESDAY...North winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ761-211515-
MAFOR 2110/
MICHIGAN NORTH 11704 11604 11500 14410 11410. A chance of showers
and thunderstorms overnight. Waves 2 feet or less.

MICHIGAN SOUTH 11700 11500 19504 11400 13310 12410. A chance of
showers overnight. Waves 2 feet or less.

$$


Wagner

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

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