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

000
FZUS63 KLOT 250154
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
854 PM CDT Sat Jun 24 2017

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...A weak trough of low pressure averaging 29.8 inches
over the upper Great Lakes will drift southeast across the eastern
and lower Great Lakes tonight and Sunday while high pressure of
30.3 inches builds from the northern to the central plains and
lower Ohio Valley. This will result in a persistent west to
northwest wind across the western Great Lakes region. The high
will eventually settle into the eastern Great Lakes by late
Monday, with a weak ridge axis averaging 30.1 inches extending
north across the western Great Lakes by Tuesday. Low pressure of
29.4 inches will develop across the northern plains by Tuesday
evening and will track northern Lakes by Thursday.

LMZ261-362-364-366-563-565-567-868-250800-
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-
854 PM CDT Sat Jun 24 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds 10 to 20 kt. Chance of showers
and thunderstorms this evening...then chance of showers
overnight. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming southwest 10 to 15
kt. Chance of showers in the morning...then chance of showers and
slight chance of thunderstorms in the afternoon. Waves 1 to 3 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt becoming north 15 to 25 kt.
Chance of showers in the evening. Waves building to 3 to 5 ft.
.MONDAY...North winds 15 to 25 kt. Chance of showers in the
afternoon. Waves 3 to 5 ft.
.MONDAY NIGHT...West winds 10 to 20 kt. Waves subsiding to 1 to 3
ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...South winds to 30 kt. Showers likely with a chance of
thunderstorms. Waves building to 5 to 8 ft occasionally to 10 ft.
.THURSDAY...Southwest winds 15 to 25 kt diminishing to 10 to 20
kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250800-
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-
854 PM CDT Sat Jun 24 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...West winds 15 to 25 kt. Slight chance of
showers. Waves 2 to 4 ft building to 3 to 5 ft.
.SUNDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Slight chance of showers in the morning...then slight chance of
showers and thunderstorms in the afternoon. Waves subsiding to 2
to 4 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt increasing to 30 kt.
Chance of showers in the evening. Waves 1 to 3 ft building to 4
to 6 ft occasionally to 8 ft.
.MONDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Chance of showers in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt. Waves subsiding to
2 to 4 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt increasing to 15 to 25
kt. Waves 2 to 4 ft building to 3 to 5 ft.
.WEDNESDAY...South winds to 30 kt. Chance of showers and
thunderstorms. Waves building to 5 to 8 ft occasionally to 10 ft.
.THURSDAY...Southwest winds 15 to 25 kt. Chance of showers. Waves
5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft.

$$

LMZ761-250800-
MAFOR 2503/
MICHIGAN NORTH 14720 11720 11610 11510 11610. Chance of showers.
Chance of thunderstorms this evening. Waves 1 to 3 ft.

MICHIGAN SOUTH 15630 12620. Waves 2 to 4 ft building to 3 to 5
ft tonight then subsiding to 2 to 4 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



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