Great Lakes Forecast
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FZUS63 KLOT 181939
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
239 PM CDT Mon Sep 18 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...30.2 inch high pressure over the northern Great Lakes
will shift into Quebec through Tuesday, with an associated ridge
axis remaining in place across the eastern United States through
the week. A low of 29.4 inches will form over the Northern Plains
Tuesday and deepen over Saskatchewan through Wednesday. The low
will reach Hudson Bay Thursday night. A second low of 29.4 inches
will form over the central Plains Thursday night. This will low
will shift through Manitoba and form a low pressure trough that
will span from south central Canada through the southern Plains
Saturday.

LMZ261-362-364-366-563-565-567-868-190400-
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-
239 PM CDT Mon Sep 18 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northeast winds 10 to 20 kt becoming east. Waves 1 to
3 ft.
.TUESDAY...East winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...South winds 15 to 25 kt. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...South winds 10 to 20 kt. Chance of showers in
the evening...then chance of showers and thunderstorms overnight.
Waves 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190400-
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-
239 PM CDT Mon Sep 18 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 10 to 20 kt veering to southeast.
Chance of showers overnight. Waves 1 to 3 ft.
.TUESDAY...East winds 10 to 20 kt diminishing to around 10 kt
late. Chance of showers and slight chance of thunderstorms in the
morning...then slight chance of showers in the afternoon. Waves 2
to 4 ft.
.TUESDAY NIGHT...Southeast winds 10 to 20 kt. Waves 1 to 3 ft.
.WEDNESDAY...South winds 15 to 25 kt. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...South winds 10 to 20 kt. Chance of showers and
thunderstorms overnight. Waves 2 to 4 ft.
.THURSDAY...South winds 10 to 15 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt. Waves 1 to 2 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 1 to 2 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ761-190400-
MAFOR 1821/
MICHIGAN NORTH 12120 14220 12220. Waves 1 to 3 ft.

MICHIGAN SOUTH 12120 11220 12320 12220 11210. Chance of showers
late this evening and Tuesday morning. Waves 1 to 3 ft increasing
to 2 to 4 ft.


$$


KMD

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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