Great Lakes Forecast
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762
FZUS63 KLOT 132025
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
225 PM CST Wed Dec 13 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 29.3 inches over southeastern
Wisconsin will across far southern Lake Michigan this afternoon
and then just south of Lake Erie this evening. The low will
continue to the mid Atlantic coast Thursday morning. Weak low
pressure of 29.9 inches will develop over Lake Superior Thursday
evening and deepen to 29.6 inches as it moves just north of Lake
Huron Friday evening. High pressure of 30.2 inches will slide
across as it crosses Ontario 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
on Sunday.

LMZ261-362-364-366-563-565-567-868-140415-
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-
225 PM CST Wed Dec 13 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northeast winds to 30 kt becoming north 15 to 25 kt.
Chance of snow this evening...then slight chance of snow
overnight. Waves 7 to 10 ft occasionally to 13 ft subsiding to 5
to 8 feet occasionally to 10 feet tonight.
.THURSDAY...Northwest winds 10 to 20 kt becoming west. Slight
chance of snow. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt. Chance of snow. 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 building to 5 to 8 ft
occasionally to 10 ft.
.FRIDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Chance of snow in the evening...then chance of flurries
overnight. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SATURDAY...East winds 10 to 20 kt becoming southeast 15 to
25 kt. Waves 2 to 4 ft building to 3 to 5 ft.
.SATURDAY NIGHT...Southeast winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...South winds 10 to 20 kt becoming southwest. Chance of
snow and rain. Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY...West winds 10 to 20 kt becoming southwest 15 to 25 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-140415-
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-
225 PM CST Wed Dec 13 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds to 30 kt diminishing to 15 to 25 kt. A few
Gale Force gusts are possible early this evening over the far
south end of the lake.  Chance of snow. Waves 6 to 9 ft
occasionally to 12 ft.
.THURSDAY...North winds 10 to 20 kt becoming northwest. Chance of
snow in the morning...then slight chance of snow in the
afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding to
3 to 5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Chance of flurries in the evening...then chance of snow
overnight. Waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft.
.FRIDAY...West winds to 30 kt increasing to gales to 35 kt.
Chance of snow in the morning...then chance of flurries in the
afternoon. Waves 7 to 10 ft occasionally to 13 ft.
.FRIDAY NIGHT...West winds to 30 kt becoming northwest. Chance of
snow. Waves 7 to 10 ft occasionally to 13 ft.
.SATURDAY...East winds 10 to 20 kt becoming southeast 15 to
25 kt. Chance of snow in the morning. Waves 3 to 5 ft.
.SATURDAY NIGHT...Southeast winds to 30 kt becoming south 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...South winds 10 to 20 kt becoming southwest. Chance of
rain. Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY...West winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-140415-
MAFOR 1322/
MICHIGAN NORTH 11147 11140 11840 12830 12720 11620. Chance of
snow this evening. Waves 7 to 10 feet occasionally to 13 feet
subsiding to 5 to 8 feet occasionally to 10 feet tonight. Waves 4
to 7 feet occasionally to 9 feet subsiding to 3 to 5 feet
Thursday.

MICHIGAN SOUTH 12840 19850 11840 12830 11820 12720. Chance of
snow. Waves 6 to 9 feet occasionally to 12 feet tonight. Waves 5
to 8 feet occasionally to 10 feet subsiding to 3 to 5 feet
Thursday.

$$

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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