Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 072104
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
304 PM CST Thu Dec 7 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 29.2 inches is located over northern
Quebec with high pressure of 30.5 inches over the central plains.
Another low of 29.6 inches will form over the upper Great Lakes
early Friday and shift to Quebec Friday night. Yet another low of
29.7 inches will form over Lake Michigan Friday night and move to
the eastern Great Lakes Saturday. Low pressure of 29.8 inches will
move from northern Manitoba Saturday evening and across Ontario
Sunday.

LMZ261-362-364-366-563-565-567-868-080430-
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-
304 PM CST Thu Dec 7 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...West winds to 30 kt. Slight chance of snow showers
this evening...then chance of snow showers overnight. Waves 4 to
7 ft occasionally to 9 ft building to 5 to 8 feet occasionally to
10 feet.
.FRIDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of snow showers. Waves 5 to 8 feet occasionally to
10 feet subsiding to 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...West winds 10 to 20 kt becoming northwest late in
the evening...then becoming north after midnight increasing to
30 kt late. Snow showers in the evening...then chance of snow
showers overnight. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...North gales to 35 kt. Snow showers likely in the
morning. Waves 7 to 10 ft occasionally to 13 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt becoming west 10 to
20 kt overnight. Waves 6 to 9 ft occasionally to 12 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds to 30 kt diminishing to 15 to 25 kt. Chance
of snow showers. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY NIGHT...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Chance of snow showers. Waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft.
.MONDAY...Northeast winds 10 to 20 kt. Chance of snow showers.
Waves 1 to 3 ft building to 2 to 4 ft.
.TUESDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Chance of snow showers. Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-080430-
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-
304 PM CST Thu Dec 7 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...West winds 15 to 25 kt increasing to 30 kt. Slight
chance of snow showers. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY...West winds to 30 kt diminishing to 15 to 25 kt. Slight
chance of snow showers in the morning...then chance of snow
showers in the afternoon. Waves 5 to 8 ft occasionally to 10 ft.
.FRIDAY NIGHT...West winds to 30 kt diminishing to 10 to 20 kt
after midnight...then becoming northwest to 30 kt late. Snow
showers. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.SATURDAY...North gales to 35 kt. Snow showers in the morning...
then snow showers likely in the afternoon. Waves 8 to 12 ft
occasionally to 16 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt becoming west 10 to
20 kt overnight. Chance of snow showers in the evening. Waves
8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.SUNDAY...Southwest winds to 30 kt becoming west. Waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
.SUNDAY NIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow showers. Waves 4 to 7 ft occasionally to
9 ft subsiding to 3 to 5 ft.
.MONDAY...North winds 10 to 20 kt increasing to 15 to 25 kt. Snow
and rain showers likely. Waves 2 to 4 ft building to 3 to 5 ft.
.TUESDAY...Northwest gales to 35 kt diminishing to 30 kt. Chance
of snow showers. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 6 to 9 ft occasionally to 12 ft.

$$

LMZ761-080430-
MAFOR 0722/
MICHIGAN NORTH 11630 14640 12630 11620. Chance of snow showers
early this evening. Chance of snow showers after midnight
tonight. Chance of snow showers Friday. Waves 4 to 7 feet
occasionally to 9 feet building to 5 to 8 feet occasionally to 10
feet tonight. Waves 5 to 8 feet occasionally to 10 feet subsiding
to 4 to 7 feet occasionally to 9 feet Friday.

MICHIGAN SOUTH 14630 12640 12630. Chance of snow showers early
this evening. Chance of snow showers early Friday afternoon. Waves
4 to 7 feet occasionally to 9 feet tonight. Waves to 5 to 8 feet
occasionally to 10 feet Friday.

$$

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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