A tornado warning was issued Sunday evening for parts of Madison, St. Clair and Clinton counties in Illinois, with the National Weather Service in St. Louis warning of radar-indicated rotation near Lebanon and telling residents to seek immediate shelter.
What happened
The National Weather Service in St. Louis issued a tornado warning Sunday evening for northwestern Clinton County, southeastern Madison County and northeastern St. Clair County in Illinois.
The warning was in effect until 5:45 p.m. CDT on June 21, 2026. At 5:23 p.m. CDT, the agency said a severe thunderstorm capable of producing a tornado was near Lebanon and moving east at 30 mph.
Radar indicated rotation in the storm, raising concern that a tornado could form.
Who was affected
Communities named in the warning included Summerfield, Trenton, Aviston, Breese, St. Rose and Germantown.
The warning said flying debris could endanger people without shelter and that mobile homes could be damaged or destroyed. It also warned of likely damage to roofs, windows, vehicles and trees.
What residents were told to do
People in the warned area were told to seek immediate shelter in a basement or an interior room on the lowest floor of a sturdy building and stay away from windows.
Because this was an active severe-weather warning, residents were urged to treat it as an immediate life-safety threat until the warning expired or was updated by forecasters.
Revision note
Initial automated publication.