Great Lakes Forecast
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000
FZUS63 KLOT 151437
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
837 AM CST Fri Dec 15 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...Low pressure of 29.8 inches over Lake Superior will
move east across the Great Lakes through Saturday morning before
merging with a stronger low off Nova Scotia Saturday afternoon.
A narrow ridge of high pressure averaging 30.1 inches will move
across the lake tonight. Meanwhile, low pressure of 29.5 inches
over Saskatchewan this afternoon will weaken to 29.9 inches as it
moves southeast to Iowa Saturday and dissipates. A weak pressure
pattern will persist over the region this weekend with high
pressure of 30.3 inches off the east coast and a strong 29.0 inch
low tracking east across northern Canada.

LMZ261-362-364-366-563-565-567-868-152230-
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-
837 AM CST Fri Dec 15 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 15 to 25 kt. Scattered snow
showers. Waves 4 to 7 ft occasionally to 9 ft.
.TONIGHT...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Scattered snow showers. Waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt becoming east. Chance of
snow in the morning. Waves 2 to 4 ft.
.SATURDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Waves 3 to 5 ft.
.SUNDAY...Southeast winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt becoming west 10 to
20 kt. Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY...West gales to 35 kt increasing to gales to 40 kt.
Chance of rain and snow showers. Waves 7 to 10 ft occasionally to
13 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-152230-
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-
837 AM CST Fri Dec 15 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...West winds to 30 kt. Periods of snow showers
through mid morning...then scattered snow showers this afternoon.
Waves 5 to 8 ft occasionally to 10 ft.
.TONIGHT...West winds 20 to 25 kt becoming southwest 10 to 20 kt.
North of Milwaukee...winds shift to northeast late. Scattered
snow showers. Waves 5 to 8 ft occasionally to 10 ft subsiding to 2
to 4 ft.
.SATURDAY...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Chance of snow in the morning. Waves 2 to 4 ft building to
3 to 5 ft.
.SATURDAY NIGHT...Southeast winds 15 to 25 kt diminishing to
10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...Southeast winds 10 to 20 kt becoming southwest. Chance
of rain in the afternoon. Waves 2 to 4 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt. Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY...West gales to 35 kt increasing to gales to 40 kt.
Waves 8 to 11 ft occasionally to 14 ft.

$$
LMZ761-152230-
MAFOR 1516/
MICHIGAN NORTH 14730 11730 11720 11810 11110. Scattered snow
showers today and tonight. Chance of snow Saturday morning. Waves
4 to 7 ft occasionally to 9 ft today. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft tonight into Saturday
morning.

MICHIGAN SOUTH 11647 12640 12630 11520 11527 11320. Scattered
snow showers this afternoon and tonight. Chance of snow Saturday
morning. Waves 5 to 8 ft occasionally to 10 ft today. Waves 5 to 8
ft occasionally to 10 ft subsiding to 2 to 4 ft late tonight into
Saturday morning.

$$


KMD

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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