Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
242 PM CDT Mon May 12 2025
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-131945-
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-
242 PM CDT Mon May 12 2025 /342 PM EDT Mon May 12 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...
Isolated thunderstorms are possible south of I-80 this evening
and then lift north across the rest of the area through the
overnight. Possible hazards include lightning, localized
downpours, and gusty winds with any storms that develop.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Tuesday and Wednesday...
Limited Thunderstorm Risk.
Thursday...
Limited Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Friday...
Elevated Fire Weather Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the northwest at 25 mph.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
242 PM CDT Mon May 12 2025
LMZ740>745-131945-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
242 PM CDT Mon May 12 2025
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Limited Thunderstorm Risk.
Limited Fog Risk.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Tuesday...
Limited Thunderstorm Risk.
Limited Fog Risk.
Wednesday...
Limited Thunderstorm Risk.
Thursday...
Hazardous conditions for small craft are likely.
Limited Thunderstorm Risk...with an associated:
Level 2 of 5 Severe Thunderstorm Risk.
Friday and Saturday...
Hazardous conditions for small craft are likely.
$$
DK
Visit us at www.weather.gov/chicago
Hazardous Weather Outlook
National Weather Service Indianapolis IN
324 PM EDT Mon May 12 2025
INZ021-028>031-035>049-051>057-060>065-067>072-131930-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby-
Rush-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-
Martin-Lawrence-Jackson-Jennings-
324 PM EDT Mon May 12 2025
This hazardous weather outlook is for central Indiana.
.DAY ONE...Through Tonight.
A few thunderstorms are possible through this evening. Severe
weather is not expected, but brief heavy downpours and lightning
will be threats from any storm.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Isolated to scattered thunderstorms are possible at times Tuesday
through Sunday. Strong to severe storms are possible late Thursday
into Thursday night...but uncertainty remains high. Brief heavy
downpours and lightning will be threats from any storm.
.SPOTTER INFORMATION STATEMENT...
Spotters are encouraged to monitor forecasts for Thursday.
&&
More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind
$$
Hazardous Weather Outlook
National Weather Service Lincoln IL
221 PM CDT Mon May 12 2025
ILZ027>031-036>038-040>057-061>063-066>068-071>073-131930-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
221 PM CDT Mon May 12 2025
This Hazardous Weather Outlook is for central Illinois, east
central Illinois, southeast Illinois and west central Illinois.
.DAY ONE...Tonight.
Isolated to scattered thunderstorms are possible through this evening.
Severe weather is not expected, though lightning is a risk with any
storms.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Isolated to scattered thunderstorms are possible Tuesday afternoon
and evening. Severe weather is not expected, though lightning is a
risk with any storms. A few funnel clouds are possible Tuesday
afternoon.
Additional thunderstorms are possible Thursday afternoon and
evening. There is a slight chance for severe storms late Thursday
afternoon into Thursday evening.
Scattered thunderstorms are possible Friday evening mainly south of
I-70.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated tonight.
$$
NMA
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
152 PM CDT Mon May 12 2025
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-131900-
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-
152 PM CDT Mon May 12 2025
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Tonight
Isolated showers and thunderstorms are possible this evening,
particularly across the southern third of Lake Michigan.
Areas of fog are expected to develop late tonight. Some dense fog
is possible, particularly across the southern half of Lake
Michigan.
.DAYS TWO THROUGH SEVEN...Tuesday through Monday
Additional areas of fog are possible Tuesday night.
Isolated showers and thunderstorms are forecast Tuesday and
Wednesday afternoon, particularly over the southern half of Lake
Michigan. More widespread showers and thunderstorms are expected
Thursday evening, when a few strong to severe storms are possible.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
152 PM CDT Mon May 12 2025
LMZ643>646-131900-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
152 PM CDT Mon May 12 2025
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
Areas of fog are expected to develop late tonight. Some dense fog
is possible.
.DAYS TWO THROUGH SEVEN...Tuesday through Monday
Additional areas of fog are possible Tuesday night.
Isolated showers and thunderstorms are forecast on Tuesday and
Wednesday afternoon. More widespread showers and thunderstorms are
expected Thursday evening, when a few strong to severe storms are
possible.
Elevated winds and waves could result in Small Craft Advisory
conditions Thursday and Friday.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
152 PM CDT Mon May 12 2025
WIZ046-047-051-052-056>060-062>072-131900-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
152 PM CDT Mon May 12 2025
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
Patchy fog is possible near the Lake Michigan shoreline late
tonight.
.DAYS TWO THROUGH SEVEN...Tuesday through Monday
Isolated showers and thunderstorms are forecast during the
afternoon hours on both Tuesday and Wednesday.
Better chances for more widespread showers and thunderstorms
arrive by Thursday evening. Some storms could be severe.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
449 AM CDT Mon May 12 2025
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-131000-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
449 AM CDT Mon May 12 2025
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...TODAY AND TONIGHT
There is a low chance for a thunderstorm late this afternoon into
early this evening southeast of a line from Moline, Illinois to
Burlington, Iowa.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
Scattered slow moving showers and a few thunderstorms are expected
on Tuesday. Locally heavy downpours and lightning are the primary
threats.
There is the potential of additional storms late Wednesday night
and Thursday where the potential for severe weather is being
monitored. Stay tuned for updates.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today or tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the west northwest at 20 mph.
$$
