Weather Alert WatchOfficial-source alert index
NWS feedSource freshLast successful check:
Ended official alertUpdated

Severe Thunderstorm Warning for Madison, IL; Monroe, IL; St. Clair, IL +2 more

This alert has ended.Kept for recent context. Do not use it as a current warning.

Official alert fields

What you need to know

Effective
Ended
Official severity
Severe
Official urgency
Immediate
Official certainty
Observed

What is happening

At 944 PM CDT, a severe thunderstorm was located near Cahokia, or near Cahokia Parks Airport, moving east at 30 mph. HAZARD...60 mph wind gusts and small hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Clayton, University City, Brentwood, Webster...

What the bulletin says to do

Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds. Continuous cloud to ground lightning is occurring with this storm. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning.

Read official NWS bulletin

Full official description

Bulletin details

At 944 PM CDT, a severe thunderstorm was located near Cahokia, or near Cahokia Parks Airport, moving east at 30 mph. HAZARD...60 mph wind gusts and small hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Clayton, University City, Brentwood, Webster Groves, St. Louis, Richmond Heights, Maplewood, Jennings, Bellefontaine Neighbors, Granite City, Cahokia, East St. Louis, Columbia, Collinsville, Glen Carbon, Belleville, Fairview Heights and Maryville. This includes the following State Parks... Frank Holten State Park, Horseshoe Lake State Park and Scott Joplin Historic Site. This includes Interstate 64 in Illinois near exit 9.

Lifecycle record

Official revisions

3 captured
  1. Update

    Severe Thunderstorm Warning issued August 16 at 9:44PM CDT until August 16 at 10:00PM CDT by NWS St Louis MO

    Official revision
  2. Update

    Severe Thunderstorm Warning issued August 16 at 9:37PM CDT until August 16 at 10:00PM CDT by NWS St Louis MO

    Official revision
  3. Alert

    Severe Thunderstorm Warning issued August 16 at 9:17PM CDT until August 16 at 10:00PM CDT by NWS St Louis MO

    Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS St Louis MO. This page reorganizes official fields and does not add a forecast or expand the affected area.

CAP status
Actual
Message type
Update
Last collected
Methodology and corrections