Great Lakes Forecast
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FZUS63 KLOT 251946
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
246 PM CDT Wed Apr 25 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...High pressure of 30.3 inches currently over the
Plains will build across the western Great Lakes tonight at
around 30.0 inches. Following this, low pressure of 29.7 inches
will cross Ontario Thursday, steering a cold front across the
lake Thursday night. A second low pressure of 29.7 inches will
move 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.

LMZ261-362-364-366-563-565-567-868-260330-
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-
246 PM CDT Wed Apr 25 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Variable winds 10 to 15 kt becoming southwest 10 to 15
kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 2 ft building to 2 to 4 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt becoming north. Chance
of rain. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Northwest 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 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.SATURDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft.
.SUNDAY...Northwest winds 10 to 15 kt becoming southwest. Waves
1 to 3 ft.
.MONDAY...Southwest winds to 30 kt becoming south. Waves 4 to
6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to
10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-260330-
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-
246 PM CDT Wed Apr 25 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds to 30 kt becoming variable 5 to 10 kt
after midnight. Waves 4 to 7 ft occasionally to 9 ft subsiding to
2 to 4 ft.
.THURSDAY...West winds 10 to 15 kt backing to south 10 to 20 kt.
Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt veering to north 15 to
25 kt. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.FRIDAY...North winds 10 to 20 kt becoming northeast 10 to 15 kt.
Chance of rain showers in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Chance of rain showers in the evening. Waves 1 to 3 ft
building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...North winds 5 to 10 kt backing to south 10 to 15 kt.
Waves 1 to 3 ft.
.MONDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
6 ft occasionally to 8 ft building to 4 to 7 ft occasionally to
9 ft.

$$

LMZ761-260330-
MAFOR 2521/
MICHIGAN NORTH 11820 11910 11900 11500 11510 12520 11420. Waves 4
to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft tonight.
Waves 1 to 2 ft building to 2 to 4 ft Thursday.

MICHIGAN SOUTH 11840 11820 11810 12900 11610 11510 11420. Waves 4
to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft tonight.
Waves 1 to 3 ft Thursday.

$$


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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