ST. LOUIS, MO. — A dangerous line of storms is pushing east across Illinois, Missouri, and Indiana on Sunday morning, June 21, and forecasters are warning that conditions could turn severe before the afternoon is over.
Radar as of Sunday morning shows an active storm line already stretching from the Quad Cities and Burlington south through Quincy, Columbia, and Jefferson City. That line is moving east — and it is not weakening.
What You Need to Know Right Now
The primary threats with this system are damaging winds and large hail. Forecasters say a zone of rapidly building instability ahead of the line — particularly across central and southern Illinois near Springfield, Bloomington, and Carbondale — will fuel the strongest storms as the system pushes through.
But here is the part that has officials watching closely: an isolated tornado cannot be ruled out.
The risk corridor stretches from St. Louis and Alton through Carbondale and into Paducah. Forecasters have specifically flagged this zone as the area where all threats — wind, hail, and tornado — overlap.
Indiana Is Next
As the morning moves into afternoon, the line is expected to continue tracking east toward Indianapolis, Bloomington, and Louisville. The same instability that is energizing storms over Illinois and Missouri will follow the line into Indiana, keeping severe storm potential alive through the afternoon hours.
Do Not Wait to Prepare
Residents across the warned zones should not wait for sirens to act. Charge your phone now. Know where your safe room is. If you are outdoors or driving, have a plan to reach a sturdy building immediately if warnings are issued.
Weather conditions are expected to remain active and fast-changing through Sunday afternoon. Stay tuned to local emergency alerts and do not ignore any warnings issued for your county.
Stay safe, Illinois. Stay safe, Missouri. Stay safe, Indiana.
