Great Lakes Forecast
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000
FZUS63 KMKX 250139
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
839 PM CDT Sat Aug 24 2019

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 30.4 inches centered over southeast Ontario will
drift eastward into New England Sunday. As the back side of the
ridge moves into the western Great Lakes region on Sunday, winds
will become more southerly and gusty ahead of the next pair of low
pressure systems that develop Sunday into Monday. The southern low
of 29.5 inches will setup in Texas with the northern low of 29.5
inches tracking across southern Saskatchewan and Manitoba Sunday
into Monday. A cold front will extend south from the northern low
and will meet up with the southern low on Monday. This front
should clear Lake Michigan Monday night into Tuesday morning.

A deeper and broader low pressure system of 29.2 inches will
develop over western Ontario late Tuesday into Wednesday, which
will setup a period of windy conditions across Lake Michigan,
particularly across the north.

LMZ261-362-364-366-563-565-567-868-250930-
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-
839 PM CDT Sat Aug 24 2019

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northeast winds 5 to 15 kt veering to
southeast 10 to 20 kt. Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 20 kt becoming east. Waves 2 to
4 ft.
.SUNDAY NIGHT...East winds 15 to 25 kt becoming southeast 10 to
20 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft.
.MONDAY...Southeast winds 15 to 25 kt becoming south. Chance of
showers and thunderstorms in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft.
.MONDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Chance of showers and thunderstorms in the evening, then showers
likely with a chance of thunderstorms overnight. Waves 4 to 6 ft
occasionally to 8 ft.
.TUESDAY...West winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of thunderstorms in the morning. Waves 3 to 5 ft.
.TUESDAY NIGHT...West winds 10 to 20 kt increasing to 30 kt.
Waves 3 to 5 ft.
.WEDNESDAY...West winds to 30 kt. Waves 4 to 7 ft occasionally to
9 ft.
.THURSDAY...West winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250930-
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-
839 PM CDT Sat Aug 24 2019

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 20 kt becoming southeast.
Waves 2 to 4 ft.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft.
.MONDAY...Southeast winds 15 to 25 kt becoming south. Chance of
showers and thunderstorms. Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Chance of showers and thunderstorms in the evening, then showers
likely with a chance of thunderstorms overnight. Waves 4 to 6 ft
occasionally to 8 ft.
.TUESDAY...West winds 10 to 20 kt. Chance of thunderstorms in the
morning. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TUESDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft building to 3 to 5 ft.
.WEDNESDAY...West winds to 30 kt. Waves 4 to 6 ft occasionally to
8 ft.
.THURSDAY...West winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-250930-
MAFOR 2503/
MICHIGAN NORTH 11210 12320 13310 12230. Waves 2 to 4 ft.

MICHIGAN SOUTH 11210 15320 11330. Waves 2 to 4 ft building to 3
to 5 ft overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft Sunday.
Waves 2 to 4 ft Sunday evening.

$$
MBK

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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