Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
557 PM CST Wed Dec 10 2025
LMZ643>646-110100-
/O.CON.KMKX.SC.Y.0110.000000T0000Z-251211T0600Z/
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
557 PM CST Wed Dec 10 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
* WHAT...Northwest winds 15 to 20 kt with gusts up to 25 kt.
* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.
* WHEN...Until midnight CST tonight.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
MRC
URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
539 PM CST Wed Dec 10 2025
LMZ740>743-110745-
/O.CON.KLOT.SC.Y.0111.000000T0000Z-251211T1000Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
539 PM CST Wed Dec 10 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST
THURSDAY...
* WHAT...Northwest winds to 25 kt and significant waves to 9 ft
occasionally to 12 ft occurring.
* WHERE...Winthrop Harbor to Calumet Harbor IL, and Calumet
Harbor IL to Gary IN.
* WHEN...Until 4 AM CST Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...The largest waves are occurring near the
outer edges of the nearshore zones.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
212 PM CST Wed Dec 10 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-112015-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
212 PM CST Wed Dec 10 2025 /312 PM EST Wed Dec 10 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Snow Risk.
DISCUSSION...
Light snow is likely this evening, mainly southwest of a
Rockford, IL to Rensselaer, IN line. Accumulations of a coating
to an inch could result in locally hazardous travel.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday night...
Elevated Snow Risk.
Saturday...
Limited Snow Risk.
Saturday morning through Monday morning...
Limited to Elevated Excessive Cold Risk.
DISCUSSION...
Accumulating snow is expected in portions of the area Thursday
night into early Friday morning and again Saturday into Saturday
night.
Bitterly cold wind chills as low as 25 below zero are possible
Saturday night into Sunday morning.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
212 PM CST Wed Dec 10 2025
LMZ740>745-112015-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
212 PM CST Wed Dec 10 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Gale force winds and very hazardous waves until early evening.
Hazardous conditions for small craft are likely through the night.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...
Hazardous conditions for small craft are likely.
Friday and Saturday...
Hazardous conditions for small craft are likely.
Elevated Freezing Spray Risk.
Sunday and Monday...
Hazardous conditions for small craft are likely.
$$
- Izzi
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
209 PM CST Wed Dec 10 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-112015-
Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to
mid-line of lake.-
Lake Michigan from Seul Choix Point to Rock Island Passage 5NM
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 5NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to
mid lake-
Lake Michigan from Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Sheboygan to Port Washington WI 5NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor to Michigan City in 5NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5NM offshore to Mid
lake-
Lake Michigan from St Joseph to South Haven MI 5NM offshore to
Mid Lake-
209 PM CST Wed Dec 10 2025
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Tonight
Gale force north to northwest winds and high waves will linger
until early this evening across the southern two thirds of Lake
Michigan. A Gale Warning remains in effect for this area.
.DAYS TWO THROUGH SEVEN...Thursday through Wednesday
Additional gales may occur at times Friday night into early next
week. Freezing spray will likely develop with these winds, as
colder air settles into the region.
$$
Wood
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
209 PM CST Wed Dec 10 2025
LMZ643>646-112015-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
209 PM CST Wed Dec 10 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
A Small Craft Advisory is in effect through this evening for gusty
north to northwest winds and lingering elevated waves.
.DAYS TWO THROUGH SEVEN...Thursday through Wednesday
Additional rounds of gusty winds and high waves are expected
again this weekend into early next week.
$$
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
121 PM CST Wed Dec 10 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-111930-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
121 PM CST Wed Dec 10 2025
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...THIS AFTERNOON AND TONIGHT
Patchy light snow is possible this evening which could lead to
slick travel conditions.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
Rounds of accumulating snow are likely Thursday afternoon into
Thursday night and again on Saturday. Much of the area is likely
to receive between 1 to 3 inches of snow with each system.
Windy conditions are expected Friday into Friday night as arctic
cold moves into the Midwest. Wind chills between 20 to 30 below
zero are possible Saturday night into Sunday morning.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed through tonight.
$$
ZU
