Illinois State Water Survey Illinois State Climatologist

Historical Tornadoes in Illinois and the US

While tornadoes can happen any time of the year, the tornado season really starts to ramp up in March in Illinois (see plot below) and remains active through the spring and on into summer. April, May, and June are the three standout months historically. So far 2015 has been very quiet with no severe weather […]

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County Level Tornado Tracks in Illinois

Tornado risk has been on a lot of minds after the events in Moore, OK. For the first time that I can recall, the local TV station (Champaign) ran an advertisement for pre-constructed storm shelters. In 2011, we produced county-level tornado track maps for all counties in Illinois to measure the historical risk of tornadoes across […]

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