Great Lakes Forecast
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FZUS63 KMKX 190750
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
250 AM CDT Sun Sep 19 2021

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...

High pressure of 30.3 inches over Lake Huron will slowly shift
east throughout the day. Southeast to south winds will continue
through the day and then build tonight into Monday ahead of an
approaching cold front. Winds may approach gale levels Monday
night before the front pushes through overnight into Tuesday
morning. Behind the front breezy northwest to north winds are
expected and will continue into Thursday.

&&

LMZ261-362-364-366-563-565-567-868-191530-
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 Sun Sep 19 2021

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...South winds 10 to 20 kt. Waves 3 to 5 ft.
.TONIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.MONDAY...South winds 15 to 25 kt increasing to 30 kt. Chance of
showers in the afternoon. Waves 4 to 7 ft occasionally to 9 ft
building to 5 to 8 ft occasionally to 10 ft.
.MONDAY NIGHT...South gales to 35 kt becoming southwest. Showers
likely with a chance of thunderstorms in the evening, then
showers with a chance of thunderstorms overnight. Waves 7 to
10 ft occasionally to 13 ft.
.TUESDAY...West winds to 30 kt becoming northwest 10 to 20 kt in
the afternoon. Showers likely with a chance of thunderstorms in
the morning. Waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...North winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.THURSDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191530-
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 Sun Sep 19 2021

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.TONIGHT...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 3 to 5 ft.
.MONDAY...South winds 15 to 25 kt increasing to 30 kt. Chance of
showers. Waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft.
.MONDAY NIGHT...South gales to 35 kt. Chance of showers and
thunderstorms in the evening, then showers with a chance of
thunderstorms overnight. Waves 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Northwest winds to 30 kt becoming north 15 to 25 kt.
Showers with a chance of thunderstorms in the morning, then
chance of showers in the afternoon. Waves 5 to 8 ft occasionally
to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt increasing to 30 kt.
Chance of showers. Waves 4 to 6 ft occasionally to 8 ft building
to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...North winds 15 to 25 kt increasing to 30 kt. Waves
7 to 10 ft occasionally to 13 ft.
.THURSDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft.

$$

LMZ761-191530-
MAFOR 1909/
MICHIGAN NORTH 16420. Waves 1 to 3 feet building to 3 to 5 feet,
then subsiding to 2 to 4 feet today. Waves 2 to 4 feet the rest
of tonight.

MICHIGAN SOUTH 14320 12310 11320 11420. Waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet today.
Waves 1 to 3 feet building to 2 to 4 feet the rest of tonight.

$$


RAH

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

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


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