Great Lakes Forecast
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560
FZUS63 KLOT 131443
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
843 AM CST Wed Dec 13 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 29.3 inches over southeast Minnesota
will move to far southern Lake Michigan this afternoon and then to
the mid Atlantic coast Thursday morning. Low pressure will
develop over Lake Superior Thursday evening and deepen to 29.6
inches as it moves to Lake Huron Friday afternoon. A 30.1 inch
high will strengthen to 30.2 inches as it crosses Ontario Friday
night and Saturday. The high will merge with another high over the
southeast U.S. to form a high averaging 30.4 inches that will
span the Atlantic Coast Saturday night. Another weak low is
forecast to move across the lake early next week.

LMZ261-362-364-366-563-565-567-868-132215-
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-
843 AM CST Wed Dec 13 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southeast winds to 30 kt becoming northeast.
Snow. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft
occasionally to 12 ft.
.TONIGHT...Northeast winds to 30 kt becoming northwest 15 to 25
kt late. Chance of snow. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt. Chance of snow. Waves
2 to 4 ft.
.FRIDAY...West winds 15 to 25 kt becoming northwest to 30 kt.
Chance of snow. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY NIGHT...Northwest winds to 30 kt becoming north 15 to
25 kt. Chance of snow. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northeast winds 10 to 20 kt veering to southeast
15 to 25 kt. Chance of snow. Waves 3 to 5 ft.
.SUNDAY...South winds 15 to 25 kt becoming southwest. Chance of
snow and rain. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-132215-
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-
843 AM CST Wed Dec 13 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...South winds to 30 kt veering to northwest.
Occasional south gales to 35 kt this morning and northwest gales
to 35 kt late this afternoon. Snow. Waves 4 to 6 ft occasionally
to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.TONIGHT...North winds to 30 kt easing to 15 to 25 kt late.
Occasional gale gusts to 35 kt are possible early this evening.
Snow likely. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...North winds 15 to 25 kt becoming northwest 10 to
20 kt. Chance of snow. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 2 to 4 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Chance of flurries in the evening...then chance of snow
overnight. Waves 3 to 5 ft.
.FRIDAY...West winds to 30 kt. Chance of snow. Waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
.FRIDAY NIGHT...Northwest winds to 30 kt subsiding to 10 to 20 kt
after midnight. Chance of snow. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming south 15 to 25
kt. Waves 3 to 5 ft.
.SUNDAY...Southwest winds 15 to 25 kt. Chance of rain and snow.
Waves 4 to 6 ft occasionally to 8 ft.

$$
LMZ761-132215-
MAFOR 1316/
MICHIGAN NORTH 11347 11247 12147 12840 12730. Chance of snow
showers tonight. Waves 4 to 7 feet occasionally to 9 feet building
to 6 to 9 feet occasionally to 12 feet today. Waves 6 to 9 feet
occasionally to 12 feet tonight. Waves 4 to 7 feet occasionally to
9 feet Thursday morning.


MICHIGAN SOUTH 11447 19457 11547 11747 19757 11847 19857 12847
12837. Chance of snow Thursday morning. Waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 feet today and continuing
tonight. Waves 5 to 8 feet occasionally to 10 feet subsiding to 4
to 7 feet occasionally to 9 feet Thursday morning.

$$

BMD

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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