Severe storms capable of producing potentially significant widespread wind damage are expected Monday afternoon and early evening across northern Illinois.
Shortly before 11:30 a.m., the National Weather Service issued a severe thunderstorm watch for all of northern Illinois until 7 p.m., calling it a potentially dangerous situation.
In its 11 a.m. update, the National Weather Service Storm Prediction Center upgraded the entire region to a moderate risk of severe storms.
"A derecho producing widespread damaging winds, some of which should be intense, is expected to persist and expand east from Iowa into parts of the Midwest through this evening," the Storm Prediction Center in its forecast summary.
Widespread damaging wind gusts, some potentially exceeding 75 miles per hour, will be the main risk; however, a tornado or two is possible along with isolated severe hail.