Derecho Storm June 2024. Derechos are widespread, damaging wind events from clusters of severe thunderstorms. With 32 tornadoes, the july 15, 2024 derecho was the most prolific tornado event to impact the nws chicago forecast area in recorded history.

With 32 tornadoes, the july 15, 2024 derecho was the most prolific tornado event to impact the nws chicago forecast area in recorded history. A derecho is a large cluster of thunderstorms that most commonly forms in late spring and summer, and causes widespread destruction to trees, power lines and sometimes structures.