Great Lakes Forecast
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000
FZUS63 KLOT 201952
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
252 PM CDT Fri Jul 20 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 29.6 inches is over Southeast
Wisconsin. This low will move across the southern third of Lake
Michigan tonight, then slowly move southeast to the upper Ohio
Valley through the weekend while filling to 29.7 inches. A high
pressure ridge averaging 30.1 inches over the northern Great
Plains will slowly shift over the Upper Midwest through the
weekend.

LMZ261-362-364-366-563-565-210330-
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-
252 PM CDT Fri Jul 20 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

.TONIGHT...East winds 15 to 25 kt diminishing to 10 to 20 kt
becoming northeast late. Chance of showers and slight chance of
thunderstorms this evening, then chance of showers overnight.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.SATURDAY...Northeast winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers in the morning, then chance of showers
and slight chance of thunderstorms in the afternoon. Waves 3 to
5 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...Northeast winds to 30 kt diminishing to 15 to
25 kt. Showers likely in the evening, then chance of showers
overnight. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northeast winds 15 to 25 kt becoming north 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.MONDAY...North winds 5 to 10 kt becoming variable. Waves 1 to 2
ft.
.MONDAY NIGHT...Southwest winds 5 to 10 kt becoming west. Waves
1 ft or less.
.TUESDAY...Northwest winds 5 to 10 kt becoming southwest. Waves
1 ft or less.
.WEDNESDAY...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.

$$

LMZ567-669-671-673-868-870-872-874-210330-
Lake Michigan from Two Rivers to Sheboygan WI 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 Pentwater to Manistee MI 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-
252 PM CDT Fri Jul 20 2018

TWO RIVERS WI TO MANISTEE MI SOUTH TO WIND POINT WI TO HOLLAND
MI...

.TONIGHT...Southeast winds 10 to 20 kt becoming northeast late.
Chance of waterspouts. Showers likely with slight chance of
thunderstorms. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Chance of waterspouts. Chance of showers and slight chance
of thunderstorms. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY NIGHT...North winds to 30 kt becoming northeast 15 to
25 kt. Chance of waterspouts. Showers likely in the evening, then
chance of showers overnight. Waves 4 to 7 ft occasionally to
9 ft.
.SUNDAY...Northeast winds 15 to 25 kt becoming north 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...North winds 5 to 10 kt. Waves 1 to 3 ft.
.MONDAY NIGHT...Northwest winds 5 to 10 kt becoming west. Waves
1 to 2 ft.
.TUESDAY...Northwest winds 5 to 10 kt becoming west. Waves 1 ft
or less.
.WEDNESDAY...Northwest winds 5 to 10 kt becoming southwest 10 to
15 kt. Waves 1 to 2 ft.

$$

LMZ080-675-777-779-876-878-210330-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
252 PM CDT Fri Jul 20 2018

WIND POINT WI TO HOLLAND MI SOUTH...

.TONIGHT...Southwest winds 15 to 25 kt diminishing to 10 to 20 kt
then becoming northwest late. Chance of waterspouts. Showers
likely with slight chance of thunderstorms. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of waterspouts. Chance of showers and slight chance of
thunderstorms. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft.
.SATURDAY NIGHT...North winds 15 to 25 kt. Chance of waterspouts.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northeast winds 15 to 25 kt becoming north 10 to 20 kt.
Chance of showers in the morning. Waves 4 to 7 ft occasionally to
9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft.
.MONDAY...Northeast winds 10 to 15 kt becoming north. Waves 1 to
3 ft.
.MONDAY NIGHT...North winds 10 to 15 kt becoming northwest 5 to
10 kt. Waves 1 to 2 ft.
.TUESDAY...Northwest winds 5 to 10 kt becoming north. Waves 1 ft
or less.
.WEDNESDAY...North winds 5 to 10 kt becoming northwest. Waves
1 ft or less.

$$

LMZ761-210330-
MAFOR 2021/
MICHIGAN NORTH 12236 12220 13120 11130. Chance of showers late
this evening tonight. Chance of showers Saturday. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft tonight. Waves 3 to 5
ft building to 4 to 6 ft occasionally to 8 ft Saturday.

MICHIGAN CENTRAL 11326 13226 13126 11836. Chance of waterspouts.
Waves 3 to 5 ft subsiding to 2 to 4 ft tonight. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft Saturday.

MICHIGAN SOUTH 11536 11526 12626 11726 11826 11820 11830. Chance
of waterspouts early this evening and Saturday. Chance of showers
Saturday. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft tonight. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft Saturday.


$$


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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