Doppler radar detected Quarter size hail near Ballwin, MO, Washington, MO and Effingham, IL on December 11, 2021. This hail storm was traveling ENE at 61 mph and the entire storm produced hail for roughly 4 hour(s). There were 2 spotter report(s) with reported max hail size of 1″ and an average hail size of 1″. We estimate that 45,879 buildings were in the affected area and the probability of hail DHI detected was significant. Based on this information, you can expect to see minor damage to vehicles, tile roofs and crops in isolated areas (Intensity Rating 2).
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