Great Lakes Forecast
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204
FZUS63 KLOT 150239
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
839 PM CST Thu Dec 14 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...Weak low pressure of 29.8 inches will develop over
Lake Superior this evening and deepen to 29.6 inches as it moves
just northeast of Lake Huron Friday evening. High pressure of 30.2
inches will pass over the lake Friday night and Saturday. The
high will merge with another high, forming a large area of high
averaging 30.4 inches that will extend along the Eastern Seaboard
Sunday.

LMZ261-362-364-366-563-565-567-868-150900-
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-
839 PM CST Thu Dec 14 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...West winds 15 to 25 kt. Chance of snow
showers. Waves 3 to 5 ft.
.FRIDAY...West winds to 30 kt becoming northwest. Chance of snow.
Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to 25
kt late in the evening...then diminishing to 10 to 20 kt after
midnight becoming north 10 to 15 kt late. Chance of snow. Waves
4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.
.SATURDAY...East winds 10 to 20 kt. Chance of snow in the
morning. Waves 1 to 3 ft.
.SATURDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Chance of snow in the evening. Waves 3 to 5 ft.
.SUNDAY...Southeast winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 3 to 5 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt becoming west. Waves
2 to 4 ft.
.MONDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY...West gales to 35 kt increasing to gales to 40 kt.
Chance of snow and rain. Waves 6 to 9 ft occasionally to 12 ft
building to 7 to 10 ft occasionally to 13 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-150900-
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-
839 PM CST Thu Dec 14 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Chance of snow showers. Waves 3 to 5 ft building to 4 to
6 ft occasionally to 8 ft.
.FRIDAY...West winds to 30 kt. Chance of snow. Waves 5 to 8 ft
occasionally to 10 ft.
.FRIDAY NIGHT...West winds to 30 kt becoming southwest 10 to 20
kt. Chance of snow. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south. Chance
of snow in the morning. Waves 2 to 4 ft.
.SATURDAY NIGHT...Southeast winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...South winds 10 to 20 kt becoming southwest. Chance of
rain in the afternoon. Waves 3 to 5 ft.
.SUNDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.
.TUESDAY...West gales to 35 kt increasing to gales to 40 kt.
Waves 6 to 9 ft occasionally to 12 ft building to 7 to 10 ft
occasionally to 13 ft.

$$
LMZ761-150900-
MAFOR 1504/
MICHIGAN NORTH 13630 11730 14740. Chance of snow showers. Waves
3 to 5 ft tonight. Waves 4 to 7 ft occasionally to 9 ft Friday
and Friday evening.

MICHIGAN SOUTH 11620 12630 14640 11640. Chance of snow showers.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft
tonight. Waves 5 to 8 ft occasionally to 10 ft Friday and Friday
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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