Great Lakes Forecast
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000
FZUS63 KLOT 150842
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
242 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
cold front trailing south from this low will move across the lake
early this morning. 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 fairly nondescript 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.

LMZ261-362-364-366-563-565-567-868-151615-
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-
242 AM CST Fri Dec 15 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...West winds 15 to 25 kt becoming northwest. Snow showers
this morning...then scattered snow showers this afternoon. 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-151615-
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-
242 AM CST Fri Dec 15 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...West winds 10 to 20 kt quickly increasing to 30 kt this
morning. Snow showers. Waves 5 to 8 ft occasionally to 10 ft.
.TONIGHT...West winds to 30 kt diminishing to 15 to 25 kt late in
the evening...then becoming northwest 10 to 20 kt 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.

$$

LMZ761-151615-
MAFOR 1510/
MICHIGAN NORTH 13637 14737 11827. Waves 4 to 7 ft occasionally to
9 ft today subsiding to 2 to 4 ft late tonight.

MICHIGAN SOUTH 10627 11637 14647 11647 12637. Waves 5 to 8 ft
occasionally to 10 ft today into this evening, then subsiding to 2
to 4 ft late tonight.

$$

- Izzi

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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