Great Lakes Forecast
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000
FZUS63 KLOT 130008 AAA
GLFLM

OPEN LAKE FORECAST for Lake Michigan...UPDATED
National Weather Service Chicago/Romeoville IL
608 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 along the Atlantic coast
will shift to Maine tonight. High pressure of 29.9 inches will
quickly pass over the Great Lakes Wednesday, with a 29.4 inch low
expected to pass over the southern end of the lake late Wednesday.
A low averaging 29.9 inches will form over Lake Superior Thursday
evening and deepen to around 29.7 inches over the Eastern Great
Lakes Friday evening.

LMZ261-362-364-366-563-565-567-868-130300-
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-
608 PM CST Tue Dec 12 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt
late this evening...then becoming southwest 10 to 15 kt overnight.
Chance of snow showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 3 to 5 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130300-
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-
608 PM CST Tue Dec 12 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northwest winds to 30 kt diminishing to 15 to 25 kt
this evening...then becoming southwest 10 to 20 kt overnight.
Snow showers. Waves 7 to 10 ft occasionally to 13 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 5 to 8 ft occasionally to 10 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.

$$
LMZ761-130300-
MAFOR 1301 AMD/
MICHIGAN NORTH 11730 11720 11510 11310 11337 12247. Chance of
snow showers tonight. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 3 to 5 ft tonight. Waves 3 to 5 ft building to 6
to 9 ft occasionally to 12 ft Wednesday.

MICHIGAN SOUTH 11747 19737 11727 11610 11537 13447. Waves 7 to
10 ft occasionally to 13 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 Wednesday.

$$

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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