Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 101455
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
855 AM CST Sun Dec 10 2017

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...A 29.8 inch low over the upper Mississippi Valley
will diminish into a low pressure trough as it crosses the western
Great Lakes today. High pressure ridging averaging 30.1 inches
will quickly pass over the western Great Lakes tonight. A deeper
low of 29.8 inches will dig southeast across the upper Midwest and
western Lakes Monday, and will deepen to 29.7 inches as it
continues to the eastern Lakes Monday night into early Tuesday.
High pressure of 30.1 inches will spread across the western Great
Lakes Wednesday.

LMZ261-362-364-366-563-565-567-868-102230-
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-
855 AM CST Sun Dec 10 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 15 to 25 kt becoming northwest. Snow
likely through mid morning...then chance of snow this afternoon.
Waves 3 to 5 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Slight chance of snow in the evening...then chance of snow
overnight. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming west. Snow showers
likely. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY NIGHT...Northwest gales to 35 kt becoming north gales to
40 kt. Freezing spray. Chance of snow showers. Waves 7 to 10 ft
occasionally to 13 ft building to 10 to 14 ft occasionally to
18 ft.
.TUESDAY...North gales to 40 kt diminishing to 30 kt in the
afternoon. Freezing spray. Chance of snow showers. Waves 8 to 12
ft occasionally to 16 ft subsiding to 7 to 10 ft occasionally to
13 ft.
.TUESDAY NIGHT...North winds to 30 kt. Freezing spray in the
evening. Chance of snow showers. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow showers. Waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft.
.THURSDAY...West winds 10 to 20 kt becoming northwest 15 to
25 kt. Chance of snow showers. Waves 1 to 3 ft building to 3 to
5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-102230-
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-
855 AM CST Sun Dec 10 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 15 to 25 kt becoming northwest.
Chance of snow. Waves 4 to 6 ft occasionally to 8 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Chance of snow. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming west late. Snow
showers likely. Waves building to 3 to 5 ft.
.MONDAY NIGHT...Northwest gales to 35 kt increasing to gales to
40 kt. Snow showers. Freezing spray late. Waves 6 to 9 ft
occasionally to 12 ft building to 12 to 16 ft occasionally to 21
ft.
.TUESDAY...Northwest gales to 40 kt diminishing to gales to
35 kt. Freezing spray. Snow showers. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 8 to 12 ft occasionally to 16
ft.
.TUESDAY NIGHT...Northwest winds to 30 kt. Chance of snow
showers. Freezing spray. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 5 to 8 ft occasionally to 10 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow showers. Waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft.
.THURSDAY...West winds 10 to 20 kt becoming northwest to 30 kt in
the afternoon. Chance of snow showers. Waves 2 to 4 ft building
to 4 to 6 ft occasionally to 8 ft.

$$
LMZ761-102230-
MAFOR 1016/
MICHIGAN NORTH 13730 11720 12710 11510 11527. Chance of snow this
afternoon. Chance of snow after midnight tonight. Waves 3 to 5
feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight.
Waves 1 to 3 feet Monday morning.

MICHIGAN SOUTH 11630 12730 12720 11710 11510 11527. Chance of
snow today and tonight. Waves 4 to 6 feet occasionally to 8 feet
today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Waves 2
to 4 feet Monday morning.

$$

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

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



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