Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FZUS63 KLOT 181949
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
249 PM CDT Sat Aug 18 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...High pressure of 30.1 inches extends from the Central
Plains across the Great Lakes and into eastern Canada. The high
will move east as low pressure of 29.8 inches develops over the
Central Plains overnight tonight. This low will deepen to 29.6
inches as it moves to southern Lake Michigan Tuesday morning, then
deepen further to 29.3 inches as it moves to southern Quebec
Tuesday night and Wednesday. A large area of high pressure
averaging 30.1 inches will build into the Plains on Tuesday and
then gradually spread east across the western Great Lakes region
on Wednesday in the wake of the departing low.

LMZ261-362-364-366-563-565-567-868-190330-
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 Sat Aug 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds 10 to 20 kt becoming northeast 10 to 15 kt
late this evening, then becoming east after midnight becoming
southeast late. Waves 3 to 5 ft subsiding to 1 to 2 ft.
.SUNDAY...South winds 10 to 15 kt veering to west. Waves 1 to
2 ft.
.SUNDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 ft or less.
.MONDAY...South winds 10 to 15 kt becoming east. Waves 1 to 3 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming northeast 10 to
20 kt. Showers likely in the evening, then showers overnight.
Waves 1 to 3 ft building to 2 to 4 ft.
.TUESDAY...North winds to 30 kt. Showers in the morning. Waves
4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally
to 12 ft.
.TUESDAY NIGHT...North winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.THURSDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190330-
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 Sat Aug 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 10 to 20 kt becoming northeast 10 to
15 kt. Patchy fog overnight. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.SUNDAY...East winds 10 to 15 kt. Patchy fog in the morning.
Waves 1 to 3 ft.
.SUNDAY NIGHT...East winds 10 to 15 kt becoming southeast. Waves
1 to 3 ft.
.MONDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers and thunderstorms in the afternoon. Waves 2 to
4 ft.
.MONDAY NIGHT...Southeast winds 10 to 20 kt becoming south.
Showers with a chance of thunderstorms in the evening, then
showers overnight. Waves 2 to 4 ft.
.TUESDAY...Northwest winds to 30 kt becoming north. Showers in
the morning. Waves 4 to 6 ft occasionally to 8 ft building to
6 to 9 ft occasionally to 12 ft.
.TUESDAY NIGHT...North winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...North winds 15 to 25 kt becoming northwest 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.THURSDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Waves 1 to 2 ft.

$$

LMZ761-190330-
MAFOR 1821/
MICHIGAN NORTH 11820 11810 11110 11210 11310 13410. Waves 3 to 5
ft subsiding to 1 to 2 ft tonight. Waves 1 to 2 ft Sunday.


MICHIGAN SOUTH 12820 11810 12110 13210. Waves 2 to 4 ft subsiding
to 1 to 3 ft tonight. Waves 1 to 3 ft Sunday.

$$

Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes

NOTICE - Starting Wednesday September 5th 2018 this product will
be issued by NWS Milwaukee. For additional information:

https://www.weather.gov/media/notification/pdfs/scn18-64lake_michigan_transfer.pdf
Or Contact: Ed Fenelon at Edward.Fenelon@noaa.gov or Ben Schott
at Ben.Schott@noaa.gov


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.