"Derecho Causes Severe Damage Across Illinois"

TL;DR
The severe weather that hit Chicago on Monday night was classified as a "derecho," a type of storm characterized by a wind damage swath extending over 240 miles with wind gusts of at least 58 mph. Derechos are most common during the warm season from May through August.
- Severe weather in Chicago classifies as ‘derecho’ -- here’s what that means WDIV ClickOnDetroit
- Derecho Flips Trucks In Illinois The Weather Channel
- What is a derecho? Here's what experts say about the dangerous weather phenomenon NBC Chicago
- Confirmed derecho hits the Stateline, damage reported in several communities WREX.com
- Storm Damage - Winnebago Co. 7 WREX.com
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