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
000
FZUS63 KLOT 241506
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
906 AM CST Sat Feb 24 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 30.3 inches over the Upper
Mississippi Valley will quickly move to Quebec by evening.
Meanwhile, low pressure of 29.7 inches organizing over the Texas
Panhandle will deepen to 29.3 inches as it quickly moves to near
Milwaukee by midnight tonight, then continue to deepen to near
29.0 inches as it reaches James Bay by early Sunday evening. Weak
high pressure of 30.2 inches will move from the Southern Plains
this evening to the Ohio Valley and Lower Great Lakes region by
Monday morning is the wake of the deep low.

LMZ261-362-364-366-563-565-567-868-242230-
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-
906 AM CST Sat Feb 24 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM 7 PM CST THIS EVENING THROUGH
SUNDAY EVENING...

.REST OF TODAY...East winds 10 to 15 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft building to 2 to 4 ft.
.TONIGHT...East winds to 30 kt becoming southeast gales to
40 kt during the evening, then shifting to southwest gales to 45
kt late. Rain with possible snow and sleet. Waves 4 to 6 ft
occasionally to 8 ft building to 7 to 10 ft occasionally to 13 ft.
.SUNDAY...Southwest gales to 45 kt in the morning with occasional
storm force gusts to around 50 kt, especially toward the Straits.
Winds easing to southwest gales to 40 kt in the afternoon. Chance
of rain in the morning. Waves 12 to 16 ft occasionally to 21 ft.
.SUNDAY NIGHT...Southwest gales to 35 kt becoming west to 30 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.
.MONDAY NIGHT...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.TUESDAY...Southwest winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.WEDNESDAY...East winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-242230-
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-
906 AM CST Sat Feb 24 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM 7 PM CST THIS EVENING THROUGH
SUNDAY AFTERNOON...

.REST OF TODAY...East winds 15 to 25 kt. Chance of rain this
afternoon. Waves 2 to 4 ft building to 3 to 5 ft late this
afternoon.
.TONIGHT...East winds to 30 kt increasing to gales to 35 kt early
in the evening, becoming southeast gales to 40 kt late in the
evening...then shifting to southwest gales to 45 kt late. Rain and
slight chance of thunderstorms. Waves 4 to 7 ft occasionally to 9
ft building to 8 to 11 ft occasionally to 14 ft.
.SUNDAY...West gales to 45 kt becoming southwest to 30 kt. Waves
8 to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft
occasionally to 13 ft.
.SUNDAY NIGHT...Southwest winds to 30 kt diminishing to 15 to
25 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY NIGHT...Southwest winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south. Waves 2 to
4 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.

$$

LMZ761-242230-
MAFOR 2416/
MICHIGAN NORTH...Gale Warning in effect...12210 11230 11256 12356
11566 11560 19570. Chance of snow and light freezing rain this
evening. Waves 1 to 3 ft today. Waves 4 to 6 ft occasionally to 8
ft building to 8 to 11 ft occasionally to 14 ft,...Then subsiding
to 6 to 9 ft occasionally to 11 ft tonight. Waves 12 to 16 ft
occasionally to 20 ft Sunday morning.

MICHIGAN SOUTH...Gale Warning in effect...12220 11240 11246 11356
11456 11560 11660. Chance of rain this afternoon. Waves 2 to 4 ft
building to 3 to 5 ft late. Waves 5 to 8 ft occasionally to 10 ft
building to 8 to 11 ft occasionally to 14 ft tonight. Waves 8 to
12 ft occasionally to 16 ft Sunday morning.

$$

KMD

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.