Great Lakes Forecast
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000
FZUS63 KLOT 200157
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
857 PM CDT Thu Jul 19 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 southern Minnesota
will deepen to 29.5 inches as it slowly tracks to Southern
Wisconsin Friday afternoon. This low will reach southern Lake
Michigan by Friday evening, then slowly move southeast to the Ohio
Valley through the weekend. A high pressure ridge averaging 30.1
inches will extend over the Northern Great Plains Friday evening
and slowly shift over the Upper Midwest through the weekend.

LMZ261-362-364-366-563-565-567-868-200800-
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-
857 PM CDT Thu Jul 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...East winds 10 to 20 kt becoming southeast to
30 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft
building to 5 to 8 ft occasionally to 10 ft.
.FRIDAY...Southeast winds to 30 kt becoming east 10 to 20 kt
early in the afternoon. Chance of showers and thunderstorms in
the morning, then showers and thunderstorms in the afternoon.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt. Showers likely in
the evening, then chance of showers overnight. Waves 3 to 5 ft.
.SATURDAY...Northeast winds 10 to 20 kt increasing to 15 to
25 kt in the afternoon. Showers likely in the morning, then
chance of showers in the afternoon. Waves 2 to 4 ft building to 4
to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...Northeast winds 15 to 25 kt diminishing to
10 to 20 kt. Chance of showers in the evening. Waves 4 to 6 ft
occasionally to 8 ft.
.SUNDAY...Northeast winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt becoming north 10 to
15 kt. Waves 3 to 5 ft.
.MONDAY...North winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 3 ft.
.TUESDAY...West winds 5 to 10 kt becoming southwest. Waves nearly
calm.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200800-
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-
857 PM CDT Thu Jul 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southeast winds 10 to 20 kt increasing to 30
kt. Chance of showers and thunderstorms. Waves 2 to 4 ft building
to 5 to 8 ft occasionally to 10 ft.
.FRIDAY...South winds to 30 kt diminishing to 10 to 20 kt early
in the afternoon, then becoming south 10 to 20 kt late. Showers
and thunderstorms likely in the morning, then showers and
thunderstorms in the afternoon. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.FRIDAY NIGHT...Southwest winds 10 to 20 kt veering to northwest.
Chance of waterspouts. Showers likely. Waves 3 to 5 ft.
.SATURDAY...North winds 15 to 25 kt increasing to 30 kt. Chance
of waterspouts. Showers likely in the morning, then chance of
showers in the afternoon. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...North winds 15 to 25 kt becoming northeast.
Chance of waterspouts. Chance of showers in the evening, then
chance of showers and thunderstorms overnight. Waves 4 to 6 ft
occasionally to 8 ft.
.SUNDAY...Northeast winds 10 to 20 kt becoming north 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt. Waves 3 to 5 ft.
.MONDAY...Northeast winds 10 to 20 kt becoming north 10 to 15 kt.
Waves 2 to 4 ft.
.TUESDAY...North winds 5 to 10 kt becoming variable. Waves 1 to 2
ft.

$$
LMZ761-200800-
MAFOR 2003/
MICHIGAN NORTH 11220 11330 12340 11230 12229 11126. Chance of
showers and thunderstorms tonight. Waves 2 to 4 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 Friday. Waves 3 to 5 ft Friday evening.

MICHIGAN SOUTH 11320 11330 12349 11440 11446 11426 11526. Chance
of showers and thunderstorms tonight. Waves 2 to 4 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 Friday. Waves 3 to 5 ft Friday 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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