
Doppler radar detected Half Dollar size hail near Granite City, IL, Arnold, MO and Collinsville, IL on November 6, 2017. This hail storm was traveling E at 36 mph and the entire storm produced hail for roughly 10 hour(s). There were 40 spotter report(s) with reported max hail size of 3″ and an average hail size of 1.46″. We estimate that 126,042 buildings were in the affected area and the probability of hail DHI detected was significant. Based on this information, you can expect widespread, severe damage to tiled roofs, automobiles, and aircraft over highly populated areas. Risk of personal injury is also high, and is often accompanied by other severe weather events (wind, tornadoes).
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