It's a term not heard here often. Derecho. The National Weather Service defines it as a mature, organized thunderstorm system producing particularly damaging downbursts. The storm came through Starved Rock Country between 2 and 3:30 Monday. Most every town and village has a story to tell about trees and limbs, powerlines down and damage to roofs.
After the storm, as many as 21,000 had no power in LaSalle, Peru and Oglesby. By 3am, Tuesday, that number was down to 5000. Ottawa was about 6700. County-wide, some 14,000 had no electrical service. Another 5000 in Bureau County were waiting in the dark. Cornbelt's workload was just under 700.
Two people hiking Matthiessen State Park during the storm found the wrong place to be. A tree fell directly on one hiker and hurt the second as it was falling. Both were taken to a local hospital with non-life threatening injuries.