Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Green Bay WI
1052 PM CDT Sat Sep 20 2025
LMZ521-522-541>543-220400-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
1052 PM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Tonight
Isolated thunderstorms are possible at times. Any storm could
pose a hazard to mariners.
.DAYS TWO THROUGH SEVEN...Sunday through Friday
Thunderstorms will be possible at times Sunday and Monday. Any
storm could pose a hazard to mariners.
$$
MPC
Hazardous Weather Outlook
National Weather Service Green Bay WI
1052 PM CDT Sat Sep 20 2025
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-220400-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
1052 PM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Tonight
Isolated thunderstorms are possible, but severe weather is not
expected.
Areas of patchy fog, some locally dense, are possible overnight,
mainly north and west of the Fox Valley.
.DAYS TWO THROUGH SEVEN...Sunday through Friday
Thunderstorms will be possible Sunday and Monday. The risk of
severe weather remains low. Heavy rainfall and localized flooding
is possible.
.SPOTTER INFORMATION STATEMENT...
Spotters are requested to report any flooding to the National
Weather Service in Green Bay.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
936 PM CDT Sat Sep 20 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-220245-
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-
936 PM CDT Sat Sep 20 2025 /1036 PM EDT Sat Sep 20 2025/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
DISCUSSION...
A few thunderstorms may develop and move over the area overnight.
No severe weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday through Wednesday...
Limited Thunderstorm Risk at times.
DISCUSSION...
Periodic showers and thunderstorms can be expected across
the area through Wednesday. Widespread severe weather or flash
flooding is not expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the northeast at 25 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
936 PM CDT Sat Sep 20 2025
LMZ740>745-220245-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
936 PM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Sunday through Wednesday...
Limited Thunderstorm Risk at times.
$$
Borchardt
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
908 PM CDT Sat Sep 20 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-220215-
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-
908 PM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for the open waters of Lake
Michigan.
.DAY ONE...Rest of Tonight
A few thunderstorms may occur.
.DAYS TWO THROUGH SEVEN...Sunday through Saturday
Thunderstorm chances will continue Sunday into early next week.
$$
Wood
www.weather.gov/mkx
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
908 PM CDT Sat Sep 20 2025
LMZ643>646-220215-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
908 PM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Rest of Tonight
A few thunderstorms may occur.
.DAYS TWO THROUGH SEVEN...Sunday through Saturday
Thunderstorm chances will continue Sunday into early next week.
$$
Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
908 PM CDT Sat Sep 20 2025
WIZ046-047-051-052-056>060-062>072-220215-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
908 PM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Rest of Tonight
A few thunderstorms may occur.
.DAYS TWO THROUGH SEVEN...Sunday through Saturday
Thunderstorm chances will continue Sunday into early next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
339 AM CDT Sat Sep 20 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-210900-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
339 AM CDT Sat Sep 20 2025
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...TODAY AND TONIGHT
Thunderstorms are possible this afternoon and evening, though the
chance of severe storms remains low.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
Additional chances of thunderstorms are possible this weekend
into early next week, although the chance of severe storms appears
low at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today or tonight.
$$
JTS
