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Completed Tornado Diagram. Tornado diagrams, also called tornado plots, tornado charts or butterfly charts, are a special type of Bar chart, where the data categories are listed vertically instead of the standard horizontal presentation, and the categories are ordered so that the largest bar appears at the top of the chart, the second largest appears second from the top, and so on.
Illinois has had large tornado outbreaks in the past, including the tornado outbreak sequence of December 18–20, 1957 and the 1967 Oak Lawn tornado outbreak. Illinois is vulnerable to tornadoes with an average of 35 occurring annually, which puts much of the state at around 5 tornadoes per 10,000 square miles (30,000 km 2) annually. [1]
At 1:50 p.m. CDT (18:50 UTC), the SPC issued a tornado watch for northern and central Illinois, far northwestern Indiana, far southern Wisconsin, and portions of Lake Michigan. A 60% chance of two or more tornadoes was assessed across the watch box, with a 40% chance of at least one strong tornado. [8]
That figure is inflated somewhat by 2011, when one of the costliest and deadliest tornado outbreaks ever recorded claimed the lives of at least 553 people, including more than 150 in one Missouri ...
1975 Canton, Illinois, tornado; Marion, Illinois, tornado outbreak; 1990 Plainfield tornado; June 1990 Lower Ohio Valley tornado outbreak; Tornado outbreak sequence of May 6–27, 1995; List of tornadoes in the May 1995 tornado outbreak sequence; Tornado outbreak sequence of April 1996; Tornado outbreak of April 15–16, 1998; List of tornadoes ...
This was one of the most intense December outbreaks in the Contiguous United States and the most intense Illinois tornado outbreak in any month. An F4 tornado struck Mt. Vernon, Illinois, an F5 tornado obliterated Sunfield, Illinois, and a long-tracked F4 struck several towns hit by the 1925 Tri-State tornado. An additional F4 tornado hit ...
It's been a little more than ten years since a tornado ripped through the northwest section of Pekin. According to the National Weather Service, the tornado crossed the Illinois River from Peoria ...
On the evening of June 20, 2021, an intense tornado affected the Chicago suburbs of Naperville, Woodridge, Darien, Burr Ridge, and Willow Springs in DuPage and Cook Counties in Illinois. It was the strongest tornado spawned by a surface low over Wisconsin, which spawned a total of four tornadoes across Illinois and Indiana. The tornado ...