Great Lakes Forecast
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FZUS63 KLOT 210148
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
848 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 over far southeast
Wisconsin will move to far southwest lower Michigan Saturday
morning. This low will slowly weaken to 29.7 inches as it
moves across the Ohio Valley this weekend. A high pressure ridge
averaging 30.1 inches over the northern Great Plains will slowly
shift over the Upper Midwest through the weekend.

LMZ261-362-364-366-563-565-210800-
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-
848 PM CDT Fri Jul 20 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

.REST OF TONIGHT...East winds 20 to 25 kt becoming northeast.
Scattered showers and slight chance of thunderstorms. Waves 4 to
6 ft occasionally to 8 ft.
.SATURDAY...Northeast winds 20 to 25 kt. Showers likely and
slight chance of thunderstorms. Waves 4 to 7 ft occasionally to
9 ft.
.SATURDAY NIGHT...Northeast winds to 30 kt diminishing to 15 to
25 kt. Showers likely and slight chance of thunderstorms 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.

$$

LMZ567-669-671-673-868-870-872-874-210800-
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-
848 PM CDT Fri Jul 20 2018

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

.REST OF TONIGHT...Northeast winds 10 to 20 kt increasing to 20
to 25 kt by morning. Slight chance of waterspouts. Scattered
showers and slight chance of thunderstorms. Waves 3 to 5 ft.
.SATURDAY...Northeast winds 20 to 25 kt becoming north to 30 kt.
Chance of waterspouts. Showers likely and slight chance of
thunderstorms. Waves 4 to 6 ft occasionally to 8 ft building to 5
to 8 ft occasionally to 10 ft.
.SATURDAY NIGHT...North winds to 30 kt becoming northeast 15 to
25 kt. Chance of waterspouts. Showers likely and slight chance
of thunderstorms in the evening, then chance of showers
overnight. Waves 5 to 8 ft occasionally to 10 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.

$$

LMZ080-675-777-779-876-878-210800-
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-
848 PM CDT Fri Jul 20 2018

WIND POINT WI TO HOLLAND MI SOUTH...

.REST OF TONIGHT...Southwest winds 15 to 25 kt shifting north
by morning. Slight chance of waterspouts. Scattered showers and
slight chance of thunderstorms. Waves 2 to 4 ft.
.SATURDAY...North winds 20 to 25 kt. Occasional gusts to 30 kt.
Chance of waterspouts. Showers likely and slight chance of
thunderstorms. Waves 3 to 5 ft building to 4 to 7 ft occasionally
to 9 ft in the morning.
.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.

$$
LMZ761-210800-
MAFOR 2103/
MICHIGAN NORTH 12230 11130 14136 11146. Scattered showers
tonight. Waves 4 to 6 ft occasionally to 8 ft tonight. Waves 4
to 7 ft occasionally to 9 ft Saturday and Saturday evening.

MICHIGAN CENTRAL 12120 11130 12136 13846. Chance of waterspouts.
Scattered showers tonight. Waves 3 to 5 ft tonight. Waves 4 to 6
ft occasionally to 8 ft building to 5 to 8 ft occasionally to 10
ft Saturday. Waves 5 to 8 ft occasionally to 10 ft Saturday
evening.

MICHIGAN SOUTH 11530 11620 11730 14836 19846 11830. Chance of
waterspouts. Scattered showers tonight. Waves 2 to 4 ft tonight.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft
Saturday morning. Waves 4 to 7 ft occasionally to 9 ft Saturday
evening.

$$

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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