Great Lakes Forecast
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FZUS63 KLOT 261958
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
258 PM CDT Wed Jul 26 2017

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 30.2 inches along the Atlantic coast
will move east off shore tonight, while a cold front moves down
the lake late tonight into Thursday morning. Meanwhile, low
pressure of 29.8 inches over the central Plains will move to
central Illinois by daybreak Thursday, and then to the Mid-
Atlantic region by early Friday. High pressure of 30.2 inches will
then build southeast across Lake Michigan on late Friday night
into Saturday, then slowly inch south into early next week.

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-
258 PM CDT Wed Jul 26 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southwest winds 10 to 20 kt becoming west 10 to 15 kt
late this evening...becoming northwest after midnight...then
becoming north late. Chance of showers with isolated thunderstorms
this evening...then slight chance of showers overnight. Waves 4
to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Waves 2 to 4 ft building to 3 to 5 ft.
.THURSDAY NIGHT...North winds 15 to 25 kt becoming northeast
10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Northeast winds 10 to 20 kt increasing to 30 kt in the
afternoon. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft.
.FRIDAY NIGHT...Northeast winds 15 to 25 kt becoming north 10 to
15 kt overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.
.SATURDAY...North winds 10 to 15 kt becoming northwest. Waves
1 to 2 ft.
.SATURDAY NIGHT...West winds 5 to 10 kt. Waves 1 to 2 ft.
.SUNDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Waves 1 to 2 ft.
.MONDAY...West winds 10 to 15 kt becoming southwest 5 to 10 kt.
Waves 1 to 2 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-
258 PM CDT Wed Jul 26 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 10 to 20 kt diminishing to 10 to 15 kt
late this evening...becoming southwest after midnight...then
becoming northwest late. Chance of showers with isolated
thunderstorms this evening...then chance of showers overnight.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Slight chance of showers and thunderstorms. Waves building
to 3 to 5 ft.
.THURSDAY NIGHT...North winds 15 to 25 kt becoming northeast.
Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Northeast winds 15 to 25 kt becoming north to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft.
.FRIDAY NIGHT...Northeast winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.SATURDAY...Northeast winds 10 to 20 kt becoming north. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt diminishing to 5 to
10 kt overnight. Waves 1 to 3 ft.
.SUNDAY...North winds 5 to 10 kt becoming northwest. Waves 1 to
2 ft.
.MONDAY...West winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.

$$

LMZ761-270330-
MAFOR 2621/
MICHIGAN NORTH 11530 11520 11610 11700 11810 11110 11120 11830.
Scattered thunderstorms with a chance of showers this evening.
Waves 4 to 6 feet occasionally to 8 feet subsiding to 2 to 4 feet
tonight. Waves 2 to 4 feet building to 3 to 5 feet Thursday.

MICHIGAN SOUTH 12420 11410 11500 11700 11110 11120 11830.
Scattered thunderstorms with a chance of showers early this
evening,...Then chance of showers early this evening. Chance of
showers late Thursday. Waves 3 to 5 feet subsiding to 2 to 4 feet
tonight. Waves building to 3 to 5 feet Thursday.

$$


Rodriguez

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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