Great Lakes Forecast
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000
FZUS63 KLOT 240750
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 AM CDT Mon Jul 24 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 29.7 inches across Lake Ontario will hold
stationary through this evening and gradually weaken. Meanwhile,
high pressure of 30.1 inches will build southward over Lake
Michigan by late this afternoon. This high will slowly move east
reaching the eastern Great Lakes by Tuesday night. Low pressure
of 29.5 inches will move east to James Bay on Wednesday, with a
trailing trough moving over the lake Wednesday night. Low
pressure around 29.7 inches is expected to develop on this trough
by late Wednesday night, shifting a cold front south across the
lake by Thursday morning. High pressure of 30.1 inches will
follow, building over the lake for the weekend.

LMZ261-362-364-366-563-565-567-868-241530-
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-
250 AM CDT Mon Jul 24 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 15 to 25 kt becoming north 10 to 20 kt
early in the afternoon. Waves 3 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft late in the day.
.TONIGHT...Northeast winds 10 to 15 kt veering to southeast
overnight. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt in
the afternoon. Waves 2 to 4 ft.
.TUESDAY NIGHT...South winds 15 to 25 kt. Waves 3 to 5 ft.
.WEDNESDAY...Southwest winds 15 to 25 kt. Chance of showers and
thunderstorms. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt veering to north
10 to 15 kt. Thunderstorms likely with a chance of showers. Waves
3 to 5 ft subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Waves building to 3 to 5 ft.
.FRIDAY...Northeast winds 10 to 20 kt becoming north. Waves
subsiding to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-241530-
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-
250 AM CDT Mon Jul 24 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 20 to 25 kt easing to 15 to 20 kt by early
afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
6 ft occasionally to 8 ft in the afternoon.
.TONIGHT...North winds 10 to 20 kt veering to southeast. Waves 3
to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft overnight.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...Southeast winds 10 to 20 kt becoming south.
Waves 1 to 3 ft.
.WEDNESDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...South winds 10 to 20 kt veering to west 10 to
15 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.
.THURSDAY...North winds 10 to 20 kt increasing to 30 kt in the
afternoon. Chance of showers and thunderstorms. Waves building
to 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Northeast winds 10 to 20 kt becoming north 15 to 25 kt.
Waves 3 to 5 ft.

$$

LMZ761-241530-
MAFOR 2409/
MICHIGAN NORTH 13130 12820 12110 11210. Waves 3 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft late in the
day, further subsiding to 1 to 2 ft overnight.

MICHIGAN SOUTH 13830 13820 11120 11220. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 6 ft occasionally to 8 ft
in the afternoon, further subsiding to 2 to 4 ft overnight.

$$

MTF

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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