Thunderstorm Wind — Warren, Illinois

2021-08-11 · near Smithshire, Warren, Illinois

56 EG

Magnitude

Event narrative

A large evergreen tree snapped halfway up the tree.

Wider weather episode

A cluster of strong thunderstorms formed in northeast Missouri early in the morning, August 11th, 2021. These storms expanded and moved northeast into northern Illinois, with a swath of damaging winds, hail, and very heavy rainfall. Some flash flooding was reported in southeast Iowa. As the storms approached the Mississippi River, a large swath of strong winds developed behind the storms, resulting in sustained winds of 40 to 60 mph, and damage through the Quad Cities metro area. This type of event is due to a wake low pressure system, behind the storms. A significant thunderstorm wind event did take place in Bureau county Illinois eastward, where widespread tree and crop damage took place.

View location on OpenStreetMap → (40.8000, -90.7500)

Source: NOAA Storm Events Database, event_id 973381. Narrative written by the NWS forecast office that issued the report.