Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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 210738
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
238 AM CDT Sat Jul 21 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 southern Lake
Michigan will move to northern Indiana today. This low will slowly
weaken to 29.7 inches as it moves to the upper Ohio Valley Sunday.
A high pressure ridge averaging 30.1 inches over the central and
northern Great Plains this morning will slowly shift over the
Upper Midwest through the weekend.

LMZ261-362-364-366-563-565-567-868-211515-
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-
238 AM CDT Sat Jul 21 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 15 to 25 kt. Occasional showers with
isolated thunderstorms. Waves 4 to 7 ft occasionally to 9 ft.
.TONIGHT...Northeast winds 15 to 25 kt. Occasional showers with
isolated thunderstorms. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northeast winds 10 to 20 kt becoming north. 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 3 to 5 ft.
.MONDAY...North winds 10 to 15 kt becoming northeast 5 to 10 kt.
Waves 1 to 2 ft.
.MONDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.TUESDAY...East winds 5 to 10 kt veering to west. Waves 1 ft or
less.
.WEDNESDAY...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211515-
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-
238 AM CDT Sat Jul 21 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Variable winds 10 to 15 kt becoming north 15 to 25
kt...then increasing to 30 kt late this afternoon. Chance of
waterspouts. Occasional showers with isolated thunderstorms. Waves
3 to 5 ft building to 5 to 8 ft occasionally to 10 ft.
.TONIGHT...North winds to 30 kt becoming northeast 15 to 25 kt.
Chance of waterspouts. Scattered showers. Waves 5 to 8 ft
occasionally to 10 ft.
.SUNDAY...Northeast winds 10 to 20 kt. Chance of waterspouts in
the morning. 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 becoming north 10 to
15 kt. Waves 3 to 5 ft.
.MONDAY...North winds 10 to 15 kt. Waves 1 to 3 ft.
.MONDAY NIGHT...North winds 5 to 10 kt becoming northwest. Waves
1 to 2 ft.
.TUESDAY...North winds 5 to 10 kt. Waves 1 ft or less.
.WEDNESDAY...Northwest winds 5 to 10 kt. Waves 1 ft or less.

$$

LMZ761-211515-
MAFOR 2109/
MICHIGAN NORTH 16136. Waves 4 to 7 ft occasionally to 9 ft.

MICHIGAN SOUTH 11916 19836 13836 11846 12840 11830. Chance of
waterspouts. Scattered showers tonight. Waves 3 to 5 ft building
to 5 to 8 ft occasionally to 10 ft today. Waves 5 to 8 ft
occasionally to 10 ft tonight.

$$

BMD

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

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


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