Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | 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
000
FZUS63 KLOT 100239
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
839 PM CST Tue Jan 9 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...A ridge of high pressure averaging 30.4 inches over
the eastern Great Lakes will move to New England tonight. Low
pressure of 29.4 inches will develop over the far northern High
Plains late tonight and will track to James Bay by Wednesday
evening. Another low of 29.5 inches will move from the central
Plains on Wednesday night to Lake Superior by Thursday morning and
to western Quebec by Thursday night. An associated cold front
trailing from this low will move across the lake Thursday evening.
High pressure of 30.8 inches will build into the Upper Midwest
Saturday while low pressure of 29.4 inches shifts through the
Appalachian states. The high will move into the Great Lakes region
on Sunday. Another clipper like low will quickly follow Sunday
night into Monday.

LMZ261-362-364-366-563-565-567-868-101100-
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-
839 PM CST Tue Jan 9 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds 15 to 25 kt increasing to 30 kt.
Areas of fog. Waves 3 to 5 ft building to 6 to 9 ft occasionally
to 12 ft.
.WEDNESDAY...South winds to 30 kt. A few gale force gusts to 35
kt. Areas of fog. Slight chance of drizzle. Waves 8 to 11 ft
occasionally to 14 ft.
.WEDNESDAY NIGHT...South winds to 30 kt. Areas of fog. Chance of
drizzle. Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...South winds to 30 kt becoming southwest. Areas of
fog. Rain showers. Waves 7 to 10 ft occasionally to 13 ft.
.THURSDAY NIGHT...North winds to 30 kt. Freezing spray. Snow
likely in the evening...then chance of snow overnight. Waves 5 to
8 ft occasionally to 10 ft building to 8 to 11 ft occasionally to
14 ft overnight.
.FRIDAY...North winds to 30 kt. Freezing spray in the morning.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft in the afternoon.
.FRIDAY NIGHT...North gales to 40 kt. Freezing spray. Chance of
snow. Waves 6 to 9 ft occasionally to 12 ft building to 8 to
11 ft occasionally to 14 ft overnight.
.SATURDAY...North gales to 35 kt diminishing to 30 kt in the
afternoon. Freezing spray. Waves 8 to 11 ft occasionally to 14 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Waves 2 to 4 ft.

Wave forecast is for ice free areas

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-101100-
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-
839 PM CST Tue Jan 9 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 15 to 25 kt increasing to 30 kt.
Areas of fog. Chance of drizzle and slight chance of light
freezing drizzle overnight. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...South winds to 30 kt. Areas of fog. Slight chance of
drizzle. Waves 6 to 9 ft occasionally to 11 ft.
.WEDNESDAY NIGHT...South winds to 30 kt. Areas of fog. Chance of
drizzle. Waves 5 to 8 ft occasionally to 10 ft.
.THURSDAY...South winds to 30 kt becoming southwest. Areas of
fog. Rain showers likely. Waves 7 to 10 ft occasionally to 13 ft.
.THURSDAY NIGHT...Northwest winds to 30 kt. Rain, snow and light
sleet likely in the evening...then chance of snow overnight.
Freezing spray overnight. Waves 5 to 8 ft occasionally to 10 ft
building to 8 to 12 ft occasionally to 16 ft overnight.
.FRIDAY...North gales to 35 kt. Freezing spray in the morning.
Waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft
occasionally to 13 ft in the afternoon.
.FRIDAY NIGHT...Northeast gales to 40 kt. Freezing spray. Chance
of snow. Waves 7 to 10 ft occasionally to 13 ft building to 8 to
12 ft occasionally to 16 ft overnight.
.SATURDAY...North gales to 35 kt. Freezing spray. Chance of snow.
Waves 8 to 12 ft occasionally to 16 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming west. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft in the
afternoon.

Wave forecast is for ice free areas

$$
LMZ761-101100-
MAFOR 1004/
MICHIGAN NORTH 10433 13443 14443 19453 11443. Chance of drizzle
Wednesday evening. Waves 3 to 5 feet building to 6 to 9 feet
occasionally to 12 feet overnight. Waves 8 to 11 feet
occasionally to 14 feet Wednesday. Waves 6 to 9 feet occasionally
to 12 feet Wednesday evening.

MICHIGAN SOUTH 11433 15443 11443. Chance of drizzle overnight.
Chance of drizzle Wednesday evening. Waves 3 to 5 feet building
to 5 to 8 feet occasionally to 10 feet overnight. Waves 6 to 9
feet occasionally to 12 feet Wednesday. Waves 5 to 8 feet
occasionally to 10 feet Wednesday evening.

$$

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.