Great Lakes Forecast
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FZUS63 KLOT 180745
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
245 AM CDT Wed Apr 18 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...A weak ridge of high pressure averaging 30.0 inches
stretches from Minnesota to West Virginia. Low pressure of 29.4
inches over Northeast Kansas will track across Central Illinois
this afternoon. The low will reach New England Thursday while a
30.5 inch high builds over the Great Plains. The high will settle
over the Western Great Lakes Friday and Saturday.

LMZ261-362-364-366-563-565-567-868-181515-
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-
245 AM CDT Wed Apr 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 10 to 20 kt becoming north and increasing to
30 kt. Chance of rain this afternoon. Waves 2 to 4 ft building to
4 to 7 ft occasionally to 9 ft.
.TONIGHT...North winds to 30 kt with a few gale force
gusts to 35 kt overnight. Chance of rain and slight
chance of snow in the evening. Waves 4 to 7 ft occasionally to 9
ft building to 7 to 10 ft occasionally to 13 ft.
.THURSDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...North winds 15 to 25 kt becoming northwest
10 to 20 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming southwest. Waves
1 to 2 ft.
.FRIDAY NIGHT...Southwest winds 5 to 10 kt. Waves 1 ft or less.
.SATURDAY...Southwest winds 5 to 10 kt. Waves nearly calm.
.SUNDAY...South winds 5 to 10 kt becoming southwest. Waves nearly
calm.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181515-
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-
245 AM CDT Wed Apr 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...East winds 10 to 20 kt becoming north 15 to 25 kt. Rain
with possible snow, thunderstorms and freezing rain this
afternoon. Waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft.
.TONIGHT...North winds to 30 kt. Rain and snow in the evening,
then chance of snow and slight chance of rain overnight. Waves
7 to 10 ft occasionally to 13 ft.
.THURSDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.THURSDAY NIGHT...Northwest winds 10 to 20 kt becoming north
10 to 15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming variable in the
afternoon. Waves 1 to 2 ft.
.FRIDAY NIGHT...Variable winds 5 to 10 kt. Waves 1 ft or less.
.SATURDAY...Variable winds 5 to 10 kt. Waves nearly calm.
.SUNDAY...Southeast winds 5 to 10 kt becoming east 10 to 15 kt.
Waves 1 ft or less.

$$

LMZ761-181515-
MAFOR 1809/
MICHIGAN NORTH 12820 11120 11130 11140 11840 12840 19850. Chance
of rain late tonight. Waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft today. Waves 4 to 7 ft occasionally to 9 ft
building to 7 to 10 ft occasionally to 13 ft tonight.

MICHIGAN SOUTH 11110 12220 11136 11837 12847 11840. Chance of
snow today. Chance of freezing rain late, then chance of rain and
snow late this evening. Waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft today. Waves 7 to 10 ft occasionally to 13
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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