Overview
- The Chicago metro, which entered Monday under High Wind Warnings that flag dangerous non-thunderstorm winds and broader Wind Advisories, faced gusts up to 60 mph forecast by the National Weather Service.
- A gauge in Sandwich, Illinois, measured a 72 mph gust as officials reported downed branches, blocked roads, and fallen power lines in Kane County.
- O'Hare International Airport imposed a ground stop until 3:30 p.m. CDT because of thunderstorms.
- Forecasters expect a second round of storms between 5 and 10 p.m. with risks that include damaging wind, large hail, flash flooding, and a slight chance of isolated tornadoes.
- The Storm Prediction Center identifies central and southern Missouri into southern Illinois as the main corridor for intense tornadoes and big hail, suggesting the most severe activity is likely to track south of Chicago.