Great Lakes Forecast
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FZUS63 KLOT 210753
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
253 AM CDT Fri Jul 21 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...A weak ridge over Lake Michigan early this morning
will move into the eastern Great Lakes this evening. Low pressure
of 29.6 inches will move over the southern end of the lake
Saturday night, and then move over the eastern Great Lakes Sunday.
An expansive 30.2 inch high will then spread over the northern
and western Great Lakes Monday night and Tuesday.

LMZ261-362-364-366-563-565-567-868-211515-
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-
253 AM CDT Fri Jul 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds 5 to 10 kt becoming south. Slight chance
of showers and thunderstorms this afternoon. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southeast 10 to
20 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft
building to 2 to 4 ft.
.SATURDAY...East winds 10 to 20 kt becoming northeast. Chance of
showers and thunderstorms. Waves 1 to 3 ft subsiding to 1 to
2 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt. Chance of showers
and thunderstorms. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 15 kt veering to north 10 to 20 kt.
Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt. Waves 1 to 3 ft
building to 3 to 5 ft.
.MONDAY...Northeast winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...Southeast winds 10 to 15 kt veering to southwest 5 to
10 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211515-
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-
253 AM CDT Fri Jul 21 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...South winds less than 10 kt increasing to 10 to 15 kt.
Slight chance of showers and thunderstorms this morning...then
chance of showers and thunderstorms this afternoon. Waves 1 ft or
less.
.TONIGHT...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Showers and thunderstorms likely in the evening...then
showers and thunderstorms overnight. Waves 2 to 4 ft.
.SATURDAY...Southwest winds 10 to 20 kt veering to northwest.
Chance of showers and thunderstorms. Waves 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt becoming northwest.
Chance of showers and thunderstorms in the evening. Waves 1 to
3 ft.
.SUNDAY...Northwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt. Waves 1 to 3 ft building
to 2 to 4 ft.
.MONDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...East winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 1 to 3 ft.

$$

LMZ761-211515-
MAFOR 2109/
MICHIGAN NORTH 13500 13410 11420 11320. Chance of showers and
thunderstorms tonight. Waves 1 to 3 feet.

MICHIGAN SOUTH 11700 12400 12410 11319 12329. Chance of showers
and thunderstorms today. Waves 1 foot or less today. Waves 2 to 4
feet tonight.

$$


Lenning

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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