Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 070240
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
840 PM CST Wed Dec 6 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 just east of James Bay
this evening will be absorbed by stronger low pressure over
northern Quebec Thursday morning. A trailing cold front will
move across the lake tonight. New low pressure of 29.7 inches
will form over Lake Superior Thursday night and move to Lake
Huron Friday night. Another low of 29.7 inches will move from
northern Manitoba Friday to central Lake Michigan Saturday
morning and then to the eastern lakes region Saturday night.

LMZ261-362-364-366-563-565-567-868-070900-
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-
840 PM CST Wed Dec 6 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds to 30 kt. Scattered snow
showers. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...Northwest winds to 30 kt becoming west 15 to 25 kt.
Chance of snow showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt. Chance of snow
showers. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...West winds 15 to 25 kt becoming northwest. Chance of
snow showers in the morning...then snow showers likely in the
afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt. Snow likely. Waves
3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...North winds to 30 kt increasing to gales to 35 kt.
Snow likely. Waves building to 7 to 10 ft occasionally to 13 ft.
.SATURDAY NIGHT...North gales to 35 kt becoming northwest 15 to
25 kt overnight. Chance of snow showers. Waves 7 to 10 ft
occasionally to 13 ft.
.SUNDAY...West winds 15 to 25 kt becoming southwest to 30 kt.
Chance of snow showers. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
.MONDAY...Northwest winds to 30 kt becoming north. Chance of
snow showers. Waves 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-070900-
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-
840 PM CST Wed Dec 6 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northwest winds to 30 kt. Scattered snow
showers. Waves 7 to 10 ft occasionally to 13 ft.
.THURSDAY...Northwest winds to 30 kt becoming west 15 to 25 kt.
Chance of snow showers. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.FRIDAY...West winds to 30 kt. Chance of snow showers in the
afternoon. Waves 5 to 8 ft occasionally to 10 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt. Chance of snow in the
evening...then snow overnight. Waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft.
.SATURDAY...Northwest winds to 30 kt becoming north gales to
35 kt. Snow in the morning...then snow showers likely in the
afternoon. Waves 5 to 8 ft occasionally to 10 ft building to 8
to 12 ft occasionally to 16 ft.
.SATURDAY NIGHT...North gales to 35 kt diminishing to 30 kt.
Chance of snow showers. Waves 8 to 12 ft occasionally to 16 ft
subsiding to 7 to 10 ft occasionally to 13 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest to 30 kt
in the afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.MONDAY...Northwest winds 15 to 25 kt increasing to 30 kt.
Chance of snow showers. Waves 4 to 7 ft occasionally to 9 ft.

$$
LMZ761-070900-
MAFOR 0704/
MICHIGAN NORTH 13747 12740 11730 12630. Chance of snow showers
Thursday. Waves 6 to 9 ft occasionally to 12 ft tonight. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft Thursday. Waves 4 to 6 ft occasionally to
8 ft Thursday evening.

MICHIGAN SOUTH 13747 12740 13630. Chance of snow showers
Thursday. Waves 7 to 10 ft occasionally to 13 ft tonight.
Waves 6 to 9 ft occasionally to 12 ft Thursday. Waves 4 to 7
ft occasionally to 9 ft Thursday evening.

$$

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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