Great Lakes Forecast
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000
FZUS63 KLOT 261948
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
248 PM CDT Thu Apr 26 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 29.7 inches near James Bay this
afternoon will move to Quebec this evening and send a trailing
cold front across Lake Michigan tonight. A second low pressure of
29.7 inches will move from Manitoba this evening across the
southern part of the lake Friday evening, steering another cold
front down the lake. High pressure of 30.3 inches will then build
over the Great Lakes for the weekend. The high will shift to the
southeast early in the week, while low pressure of 29.5 inches
will lift from the Central Plains Monday to Lake Superior Tuesday.

LMZ261-362-364-366-563-565-567-868-270330-
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-
248 PM CDT Thu Apr 26 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southwest winds 15 to 25 kt veering to north 15 to 25
kt. Chance of rain showers. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft overnight.
.FRIDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of rain showers in the afternoon. Waves 3 to 5 ft
subsiding to 1 to 3 ft.
.FRIDAY NIGHT...North winds to 30 kt. Waves 1 to 3 ft building to
5 to 8 ft occasionally to 10 ft.
.SATURDAY...North winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.SATURDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
15 kt overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft overnight.
.SUNDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...South winds to 30 kt. Waves 3 to 5 ft building to 4 to
7 ft occasionally to 9 ft in the afternoon.
.TUESDAY...South winds to 30 kt. Waves 5 to 8 ft occasionally to
10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270330-
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-
248 PM CDT Thu Apr 26 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Variable winds less than 10 kt quickly becoming south
winds 10 to 20 kt, then veering to north 15 to 25 kt overnight.
Slight chance of rain showers. Waves 2 to 4 ft building to 4 to 6
ft occasionally to 8 ft.
.FRIDAY...Northwest winds 10 to 20 kt veering to southeast 10 to
15 kt. Rain showers in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 1 to 3 ft.
.FRIDAY NIGHT...North winds to 30 kt. Chance of rain showers in
the evening. Waves 1 to 3 ft building to 5 to 8 ft occasionally
to 10 ft.
.SATURDAY...North winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.SATURDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
15 kt overnight. Waves 5 to 8 ft occasionally to 10 ft subsiding
to 3 to 5 ft overnight.
.SUNDAY...Northwest winds 5 to 10 kt backing to south 10 to 20 kt
in the afternoon. Waves 1 to 3 ft.
.SUNDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...South winds 15 to 25 kt. Waves 3 to 5 ft building to
4 to 7 ft occasionally to 9 ft in the afternoon.
.TUESDAY...South winds to 30 kt. Waves 4 to 7 ft occasionally to
9 ft.

$$

LMZ761-270330-
MAFOR 2621/
MICHIGAN NORTH 11430 11530 11720 11830 12820 11710 11110. Chance
of rain showers early this evening and Friday. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft tonight. Waves 4 to 6
ft occasionally to 8 ft subsiding to 2 to 4 ft Friday.

MICHIGAN SOUTH 10900 11420 11410 11520 11630 11830 11720 11710
11316. Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft
tonight. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4
ft Friday.

$$


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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