Great Lakes Forecast
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FZUS63 KLOT 170820
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
320 AM CDT Tue Apr 17 2018

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 29.5 inches over Southeast Ontario
will drift to Southern Quebec today. A weak ridge of high
pressure averaging 30.1 inches over the Plains will spread across
the Western Great Lakes by tonight. Low pressure of 29.3 inches
will track from the Southern Plains Tuesday evening to just south
of Lake Michigan by Wednesday afternoon. The low will reach New
England Thursday afternoon while a 30.5 inch high builds over the
Plains.

LMZ261-362-364-366-563-565-171530-
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-
320 AM CDT Tue Apr 17 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

.TODAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Slight chance of snow this morning. Waves 6 to 9 ft occasionally
to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming north late. Waves
3 to 5 ft subsiding to 1 to 3 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt increasing to 15 to
25 kt in the afternoon. Chance of snow and rain in the afternoon.
Waves 2 to 4 ft building to 3 to 5 ft.
.WEDNESDAY NIGHT...North winds to 30 kt. Chance of snow and rain
in the evening. Waves 4 to 7 ft occasionally to 9 ft building to
6 to 9 ft occasionally to 12 ft.
.THURSDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft.
.THURSDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.FRIDAY...North winds 10 to 15 kt becoming northwest. Waves 1 to
3 ft.
.SATURDAY...South winds 5 to 10 kt. Waves 1 ft or less.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-171530-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 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 Pentwater to Manistee MI 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-
320 AM CDT Tue Apr 17 2018

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TODAY...Northwest winds to 30 kt diminishing to 10 to 20 kt.
Slight chance of light freezing rain and snow this morning. Waves
8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming northeast. Waves
4 to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft.
.WEDNESDAY...East winds 10 to 20 kt becoming north 15 to 25 kt.
Chance of rain, light sleet and light freezing rain in the
morning, then rain, snow and light sleet in the afternoon. Waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...North winds to 30 kt. Rain and snow in the
evening, then chance of snow and rain overnight. Waves 4 to 7 ft
occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft.
.THURSDAY...North winds to 30 kt. Waves 7 to 10 ft occasionally
to 13 ft.
.THURSDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.FRIDAY...North winds 10 to 15 kt. Waves 2 to 4 ft.
.SATURDAY...East winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 ft or less.

$$

LMZ761-171530-
MAFOR 1709/
MICHIGAN NORTH 12740 13730 13720. Chance of snow early this
morning. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6
ft occasionally to 8 ft today. Waves 3 to 5 ft subsiding to 1 to
3 ft tonight.

MICHIGAN SOUTH 12740 11730 13720 11810 11110. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 4 to 7 ft occasionally to 9 ft
today. Waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft
tonight.

$$


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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