EF1 Tornado — Carroll, Illinois

2024-07-15 · near Mt Carroll, Carroll, Illinois

Event narrative

A tornado developed just northeast of Hanover in Jo Daviess County, and tracked to the southeast around 50 mph along an intermittent path. The tornado caused significant roof damage to a home east of Hanover that was rated EF-1. The tornado then moved into Carroll County near S. Breyer Road, around 18:02 CST. The tornado caused EF-1 damage around Lake Carroll, including damage to a garage, gazebo, and boat dock, and numerous trees downed. The tornado then downed trees in Shannon before lifting around 18:16 CST. The tornado was rated EF-1 with maximum winds around 100 mph, in both Jo Daviess and Carroll Counties.

Wider weather episode

Thunderstorms rapidly developed over northern Iowa during the afternoon and organized into a powerful line of wind producing storms that surged through the Quad Cities and into northern and central Illinois through the evening hours. These storms brought widespread damaging winds up to 100 mph for many locations, extending across eastern Iowa, much of Illinois, and into Indiana. The Storm Prediction Center has classified this event as a Derecho which by definition is a swath of wind damage at least 400 miles long and at least 60 miles wide including several well-separated significant wind gusts over 75 mph. Corridors of significant wind damage occurred along Highway 20. 10 tornadoes also occurred with these storms in the NWS Quad Cities service area.

In addition to the wind, very heavy rainfall fell in a short amount of time with many locations seeing over an inch. The highest totals fell in McDonough and Warren counties in Illinois where amounts between 2 and 3 inches fell.

View location on OpenStreetMap → (42.1960, -89.9390)

Source: NOAA Storm Events Database, event_id 1204530. Narrative written by the NWS forecast office that issued the report.