Great Lakes Forecast
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000
FZUS63 KLOT 190742
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
242 AM CDT Tue Sep 19 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 30.2 inch high pressure ridge extends from Quebec
through the Gulf Coast. While the center of the high will continue
northeast, the ridge will remain stationary over the eastern U.S.
through early next week. The 29.5 inch low over the northern
Plains will deepen over Saskatchewan through Wednesday and then
reach Hudson Bay Thursday. High pressure averaging 30.0 inches
will pass over Lake Superior Thursday while a second low will form
over the central Plains Thursday night. The low will reach
Southwest Ontario Saturday morning and create a low pressure
trough that stretches from the northern Mississippi Valley through
the southern Plains through early next week.

LMZ261-362-364-366-563-565-567-868-191515-
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-
242 AM CDT Tue Sep 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...East winds 10 to 20 kt becoming southeast...and then
becoming northeast late in the afternoon. Waves 2 to 4 ft
subsiding to 1 to 2 ft.
.TONIGHT...East winds 10 to 20 kt becoming southeast. Waves 1 to
3 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt becoming south 15 to
25 kt. Waves 1 to 3 ft building to 3 to 5 ft.
.WEDNESDAY NIGHT...South winds 10 to 20 kt veering to north 10 to
15 kt. Chance of showers and thunderstorms. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...East winds 10 to 15 kt becoming south. Waves
1 to 2 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191515-
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-
242 AM CDT Tue Sep 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...East winds 10 to 20 kt becoming northeast 10 to 15 kt
late this afternoon. Chance of showers and slight chance of
thunderstorms this morning...then slight chance of showers this
afternoon. Waves 1 to 3 ft.
.TONIGHT...Northeast winds 5 to 10 kt becoming east 10 to 15 kt
late in the evening...then becoming southeast 10 to 20 kt
overnight. Waves 1 to 3 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Waves 1 to 3 ft building to 3 to 5 ft.
.WEDNESDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Chance of showers and thunderstorms. Waves 3 to 5 ft subsiding to
1 to 3 ft.
.THURSDAY...North winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 3 ft.
.THURSDAY NIGHT...East winds 10 to 15 kt becoming south. Waves
1 to 2 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-191515-
MAFOR 1909/
MICHIGAN NORTH 11220 12320 11210 11120 11220 12320. Waves 2 to 4
feet subsiding to 1 to 2 feet today. Waves 1 to 3 feet tonight.


MICHIGAN SOUTH 13220 11210 11110 11100 11210 11320. Chance of
showers early this morning. Waves 1 to 3 feet.

$$


JEE

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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