Great Lakes Forecast
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000
FZUS63 KLOT 130238
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
838 PM CST Tue Dec 12 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 29.4 inches over southern Manitoba
this evening will move to far southern Lake Michigan Wednesday
afternoon...then move off the mid Atlantic coast by Thursday
morning. Low pressure is expected to develop over Lake Superior
Thursday evening and deepen to 29.7 inches as it moves to Lake
Huron Friday afternoon.

LMZ261-362-364-366-563-565-567-868-130900-
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-
838 PM CST Tue Dec 12 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds 15 to 25 kt becoming
southeast 10 to 15 kt by morning. Chance of snow showers. Waves
4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt increasing to 30 kt
late in the morning...then becoming east early in the afternoon
becoming northeast late. Snow. Waves 3 to 5 ft building to 6 to
9 ft occasionally to 12 ft.
.WEDNESDAY NIGHT...Northeast winds to 30 kt becoming north 15 to
25 kt. 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 6 ft occasionally to 8 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. Chance of
snow. Waves 3 to 5 ft.
.FRIDAY NIGHT...Northwest winds to 30 kt. Chance of snow. Waves
4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northwest winds 15 to 25 kt backing to south 10 to
20 kt. Chance of snow. Waves 3 to 5 ft.
.SUNDAY...South winds to 30 kt becoming southeast 15 to 25 kt.
Chance of snow. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130900-
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-
838 PM CST Tue Dec 12 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northwest winds 15 to 25 kt backing to
southwest 10 to 20 kt. Snow showers likely. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 3 to 6 ft occasionally to 8
ft.
.WEDNESDAY...South winds to 30 kt backing to northeast. Snow.
Waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY NIGHT...Northeast winds to 30 kt becoming north 15 to
25 kt. Snow likely. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20
kt. Chance of snow in the morning. Waves 4 to 7 ft occasionally
to 9 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Chance of snow. Waves 2 to 4 ft building to 3 to 5 ft.
.FRIDAY...West winds to 30 kt. Chance of snow. Waves 4 to 7 ft
occasionally to 9 ft.
.FRIDAY NIGHT...West winds to 30 kt. Chance of snow. Waves 4 to
7 ft occasionally to 9 ft.
.SATURDAY...West winds to 30 kt becoming southwest 15 to 25 kt.
Chance of snow. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...South winds to 30 kt veering to southwest 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.

$$
LMZ761-130900-
MAFOR 1304/
MICHIGAN NORTH 11730 19720 11710 19500 11310 11337 12247 11147
11140. Chance of snow showers tonight. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 2 to 4 ft tonight. Waves 3
to 5 ft building to 6 to 9 ft occasionally to 12 ft Wednesday.
Waves 6 to 9 ft occasionally to 12 ft Wednesday evening.

MICHIGAN SOUTH 11727 11610 11437 13447 12147. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 3 to 6 ft occasionally to 8
ft tonight. Waves 3 to 5 ft building to 6 to 9 ft occasionally
to 12 ft. Waves 6 to 9 ft occasionally to 12 ft Wednesday
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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