Great Lakes Forecast
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FZUS63 KLOT 241949
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
249 PM CDT Tue Apr 24 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 29.8 inches is over the southeastern
United States with weak troughing stretching into the Midwest. A
cold front will move south across Lake Michigan through tonight.
30.6 inch high pressure over the northern Great Plains will build
into the Upper Midwest tonight into Wednesday. The ridge will move
across Lake Michigan Wednesday night at 30.1 inches. A 29.4 inch
low will move across Hudson Bay Wednesday night and a trailing
cold front will push across Lake Michigan Thursday night. A weak
low of 23.7 inches will pass over the lake Friday night.

LMZ261-362-364-366-563-565-567-868-250330-
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-
249 PM CDT Tue Apr 24 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds 15 to 25 kt increasing to 30 kt. Isolated
rain showers this evening. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...North winds 20 to 25 kt diminishing to 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt backing to
southwest. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 3 ft building to 2 to 4 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt veering to north 15 to
25 kt. Chance of rain and light freezing rain overnight. Waves
3 to 5 ft.
.FRIDAY...North winds 15 to 25 kt becoming west 10 to 20 kt.
Waves 3 to 5 ft.
.FRIDAY NIGHT...Southwest winds 10 to 15 kt becoming northwest 10
to 20 kt. Waves 1 to 3 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft building to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250330-
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-
249 PM CDT Tue Apr 24 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 10 to 20 kt increasing to 30 kt. Isolated
rain showers this evening. Waves 3 to 5 ft building to 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt late in the evening, then becoming northwest to 5 to 10 kt
after midnight. Waves 4 to 7 ft occasionally to 9 ft subsiding to
1 to 3 ft.
.THURSDAY...Southwest winds 5 to 10 kt becoming south 10 to 15 kt.
Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 15 kt veering to northwest
15 to 25 kt overnight. Chance of rain overnight. Waves 1 to 3 ft
building to 3 to 5 ft.
.FRIDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY NIGHT...Southwest winds 10 to 20 kt becoming west. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...East winds 10 to 15 kt becoming southeast 10 to 20 kt.
Waves 1 to 2 ft building to 2 to 4 ft.

$$

LMZ761-250330-
MAFOR 2421/
MICHIGAN NORTH 11830 14840 13830. Waves 3 to 5 ft building to 5
to 8 ft occasionally to 10 ft tonight. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft
Wednesday.

MICHIGAN SOUTH 11820 14840 11840 12830. Waves 3 to 5 ft building
to 7 to 10 ft occasionally to 13 ft tonight. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 7 ft occasionally to 9 ft
Wednesday.

$$


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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