Severe Weather Alert: Southern Illinois Faces Enhanced Tornado Risk
The Storm Prediction Center has issued a moderate risk (Level 4 of 5) for severe weather in southern Illinois on Monday afternoon. The primary threat is tornadoes, with a 15-29% probability across the Mississippi River Valley, including St. Louis.
"A very favorable corridor for intense supercells and strong tornadoes is apparent this afternoon/evening across parts of Missouri into Illinois."
— Storm Prediction Center
A Cig-2 intensity risk indicates an increased likelihood of EF3+ tornadoes. Secondary threats include severe winds (45% risk) and large hail (30% risk, with possible 2.5+ inch hail).
Timing & Key Window
The main window for severe storms is 2 p.m. to 10 p.m. The most likely timeframe for the St. Louis metro and Central Illinois is 4-8 p.m. Morning thunderstorms may affect the environment, causing uncertainty in exact development timing.
"If clouds clear more quickly, the environment will be favorable for higher-end severe thunderstorms including the maximum hazard intensities."
— St. Louis National Weather Service
Stay Prepared
Residents in the affected area should:
- Monitor local weather alerts closely
- Review severe weather safety plans
- Ensure multiple ways to receive warnings
- Be prepared to take shelter quickly if a tornado warning is issued