Thunderstorm Wind in Warren County, Illinois
Thunderstorm Wind August 11, 2021 · Warren County, Illinois
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
A large evergreen tree snapped halfway up the tree.
The wider storm
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.
Began near Smithshire (40.8000, -90.7500).
Source: NOAA Storm Events Database, event 973381. Narratives are written by the National Weather Service forecast office that issued the report.
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