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

000
FZUS63 KLOT 130851
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
251 AM CST Sat Jan 13 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...Strong, arctic high pressure of 30.9 inches over the
Northern Plains will move southeast to the Midwest through
tonight, while gradually weakening to 30.7 inches. The high will
then become elongated from the Upper Ohio Valley to New England
Sunday, as low pressure of 30.1 inches drops southeast from
Manitoba. This low will move to southern Wisconsin by Monday
morning, slowing as it drifts east across the lake during the day.
The low will continue east to Lake Huron by early Tuesday,
filling slightly to 30.3 inches. Another strong high pressure of
40.0 inches will push south across the Plains, weakening to 30.7
inches and reaching the lower Missouri Valley by Wednesday
morning.

LMZ261-362-364-366-563-565-567-868-131630-
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-
251 AM CST Sat Jan 13 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds to 30 kt becoming northwest 10 to 20 kt.
Freezing spray this morning. Snow showers mainly east. Waves 6 to
9 ft occasionally to 12 ft subsiding to 3 to 5 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming west. Waves
subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt
late in the morning...then increasing to 30 kt early in the
afternoon becoming south late. Chance of snow in the afternoon.
Waves 1 to 3 ft building to 4 to 7 ft occasionally to 9 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...South winds to 30 kt becoming southeast 15 to 25 kt.
Snow likely. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt increasing to 30 kt
overnight. Chance of snow. Waves 3 to 5 ft.
.TUESDAY...North winds to 30 kt. Chance of snow. Waves 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY...West winds to 30 kt. Waves 4 to 6 ft occasionally to
8 ft building to 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-131630-
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-
251 AM CST Sat Jan 13 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds to 30 kt becoming northwest 10 to 20 kt.
Freezing spray this morning. Chance of snow. Waves 8 to 12 ft
occasionally to 16 ft subsiding to 4 to 6 ft occasionally to 8
ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Chance of snow. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt
and becoming southwest 15 to 25 kt by early afternoon, then
becoming south to 30 kt late. Waves 1 to 3 ft building to 4 to 6
ft occasionally to 8 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow. Freezing spray
overnight. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY...Southwest winds to 30 kt becoming west. Snow in the
morning...then chance of snow in the afternoon. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Freezing spray. Chance
of snow. Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northwest winds to 30 kt. Chance of snow. Waves 4 to
7 ft occasionally to 9 ft.
.WEDNESDAY...West winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-131630-
MAFOR 1310/
MICHIGAN NORTH 12840 11730 13720 11620 11610. Chance of snow
early this morning. Waves 6 to 9 feet occasionally to 12 feet
subsiding to 3 to 5 feet today. Waves 2 to 4 feet tonight.

MICHIGAN SOUTH 11840 11740 11730 12720 12710 11610. Chance of
snow. Waves 8 to 12 feet occasionally to 16 feet subsiding to 4
to 7 feet occasionally to 9 feet today. Waves 4 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet tonight.

$$

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.