Heat Advisory issued September 15 at 1:44AM CDT until September 15 at 7:00PM CDT by NWS St Louis MO
Issue date: 2026-09-15T06:44+00:00
* WHAT...Heat index values up to 109 expected. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...From 11 AM this morning to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
