Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
352 PM CST Mon Dec 15 2025
LMZ740>745-160600-
/O.EXP.KLOT.SC.Y.0113.000000T0000Z-251215T2200Z/
/O.NEW.KLOT.SC.Y.0114.251216T1600Z-251217T0900Z/
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-
352 PM CST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TUESDAY TO 3 AM CST
WEDNESDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 4 PM CST THIS AFTERNOON...
* WHAT...Southwest winds to 25 kt and significant waves to 5 ft
expected.
* WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL
to Michigan City IN.
* WHEN...From 10 AM Tuesday to 3 AM CST Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
326 PM CST Mon Dec 15 2025
LMZ521-522-541>543-160530-
/O.NEW.KGRB.SC.Y.0098.251216T1500Z-251217T1200Z/
Green Bay south of line from Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
326 PM CST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM TUESDAY TO 6 AM CST
WEDNESDAY...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and
waves 4 to 7 ft expected.
* WHERE...Lake Michigan nearshore waters from Washington Island
to Sheboygan, and Central and Southern Bay of Green Bay.
* WHEN...From 9 AM Tuesday to 6 AM CST Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
209 PM CST Mon Dec 15 2025
LMZ643-644-160415-
/O.NEW.KMKX.SC.Y.0113.251216T1500Z-251217T1200Z/
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
209 PM CST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM TUESDAY TO 6 AM CST
WEDNESDAY...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and
waves 4 to 6 ft expected.
* WHERE...Nearshore Waters from Sheboygan to North Point
Lighthouse.
* WHEN...From 9 AM Tuesday to 6 AM CST Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
209 PM CST Mon Dec 15 2025
LMZ645-646-160415-
/O.CAN.KMKX.SC.Y.0112.000000T0000Z-251215T2100Z/
/O.NEW.KMKX.SC.Y.0113.251216T1500Z-251217T1200Z/
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
209 PM CST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 9 AM TUESDAY TO 6 AM CST
WEDNESDAY...
...SMALL CRAFT ADVISORY IS CANCELLED...
* WHAT...The Advisory for this afternoon has been canceled due to
winds and waves diminishing below threshold levels. The Advisory
for Tuesday and Tuesday night is due to expected southwest winds
15 to 25 kt with gusts up to 30 kt.
* WHERE...Nearshore Waters from North Point Lighthouse to
Winthrop Harbor IL.
* WHEN...From 9 AM Tuesday to 6 AM CST Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
345 PM CST Mon Dec 15 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-162145-
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-
345 PM CST Mon Dec 15 2025 /445 PM EST Mon Dec 15 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Freezing Fog Risk overnight.
DISCUSSION...
Patchy fog will develop overnight, and where it develops it could
become locally dense. Temperatures will fall well below freezing again,
and therefore fog may freeze on surfaces if it becomes dense.
This potential is highest west of the Fox River Valley and north of
Interstate 80.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Thursday...
Elevated Non Thunderstorm Wind Risk.
Limited Snow Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
225 PM CST Mon Dec 15 2025
WIZ046-047-051-052-056>060-062>072-162030-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
225 PM CST Mon Dec 15 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
Areas of fog are expected to develop across southwestern Wisconsin
overnight. Locally dense fog is possible, but confidence is low.
.DAYS TWO THROUGH SEVEN...Tuesday through Monday
Patchy fog may develop again Tuesday night.
A wintry mix of rain and snow is expected Thursday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
151 PM CST Mon Dec 15 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-162000-
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-
151 PM CST Mon Dec 15 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
Areas of dense fog are possible late tonight. The fog combined
with temperatures below freezing could lead to slick spots.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
A strong cold front will bring a period of gusty northwest winds
on Thursday, with gusts over 40 mph possible.
.SPOTTER INFORMATION STATEMENT...
Any reports of road impacts from dense fog would be appreciated
tonight.
$$
