Great Lakes Forecast
Issued by NWS

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
000
FZUS63 KLOT 182054
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
254 PM CST Thu Jan 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 30.6 inches over the Deep South will
remain into the start of the weekend. Meanwhile, low pressure of
29.7 inches over southern Ontario will will drift east while
weakening this evening. Another low of 29.3 inches will move from
Alberta this evening to James Bay Friday night. Yet another low of
29.6 inches will move from the central/southern Great Plains
early Sunday to Lake Michigan Monday deepening to 29.3 inches.

LMZ261-362-364-366-563-565-567-868-190430-
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-
254 PM CST Thu Jan 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

.TONIGHT...Southwest winds to 30 kt becoming west 15 to 25 kt this
evening...then becoming southwest 10 to 20 kt. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 7
ft.
.FRIDAY...Southwest winds 15 to 25 kt increasing to gales to
35 kt. Waves building to 7 to 10 ft occasionally to 13 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt becoming west 15 to
25 kt. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to
9 ft occasionally to 12 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Southwest winds 10 to 15 kt backing to
southeast. Waves 1 to 3 ft.
.SUNDAY...East winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain and snow in the afternoon. Waves 1 to 3 ft
building to 2 to 4 ft.
.SUNDAY NIGHT...East winds to 30 kt. Rain likely with snow. Waves
4 to 6 ft occasionally to 8 ft.
.MONDAY...Southeast winds to 30 kt. Rain likely. Waves 5 to 8 ft
occasionally to 10 ft.
.TUESDAY...Northwest winds to 30 kt. Chance of snow. Waves 5 to
8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190430-
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-
254 PM CST Thu Jan 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

.TONIGHT...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.FRIDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves building to 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt diminishing to 30 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt diminishing to
10 to 15 kt. Patchy fog in the evening...then areas of fog
overnight. Chance of drizzle overnight. Waves 2 to 4 ft subsiding
to 1 to 3 ft.
.SUNDAY...South winds 10 to 15 kt becoming southeast 10 to 20 kt.
Areas of fog. Chance of rain and light freezing rain in the
morning...then chance of rain in the afternoon. Waves 1 to 3 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt increasing to 30 kt.
Patchy fog. Rain likely. Waves 2 to 4 ft building to 3 to 5 ft.
.MONDAY...Southeast winds to 30 kt becoming south. Rain likely.
Waves 5 to 8 ft occasionally to 10 ft.
.TUESDAY...West gales to 35 kt. Chance of snow. Waves 6 to 9 ft
occasionally to 12 ft.

$$

LMZ761-190430-
MAFOR 1822/
MICHIGAN NORTH...Gale Warning in effect...11540 12630 11620 11520
11530 11540 11550. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft tonight. Waves building
to 7 to 10 ft occasionally to 13 ft Friday.

MICHIGAN SOUTH...Gale Warning in effect...13540 12530 13540.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft tonight. Waves building to 6 to 9 ft
occasionally to 12 ft Friday.

$$


Rodriguez

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.