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The May 2009 Southern Midwest Derecho was an extreme progressive derecho and mesoscale convective vortex (MCV) event that struck southeastern Kansas, southern Missouri, and southwestern Illinois on May 8, 2009.
In Northern Illinois, near Peoria, other tornadoes were reported along a hook echo formation, causing heavy damage in Sangamon County, Illinois (where the strongest tornado of the outbreak - an EF3 - occurred) and Cook County, Illinois. More tornadoes developed on August 20 over the central Great Lakes in Ontario. Eighteen tornadoes touched ...
This tornado moved along an intermittent path across southwestern and central Springfield, damaging one to two dozen houses and businesses, and toppling several trees and power lines. [ 30 ] [ 31 ] At least 250 residences were left without power, [ 32 ] and damage was estimated at $350,000. [ 30 ]
Illinois has had large tornado outbreaks in the past, the most notable being the tornado outbreak sequence of December 18–20, 1957. 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 ]
On May 3, a moderate risk of severe weather was issued for parts of Mississippi, Alabama, and Georgia, mainly for a threat of intense downburst winds. [1] A major progressive derecho with widespread and extensive wind damage - as strong as 110 mph (175 km/h) at times [2] - and embedded tornadoes was confirmed to have traveled from East Texas all the way to Alabama with numerous reports of ...
This tornado moved along an intermittent path across southwestern and central Springfield, damaging one to two dozen houses and businesses, and toppling several trees and power lines. [ 34 ] [ 35 ] At least 250 residences were left without power, [ 36 ] and damage was estimated at $350,000. [ 34 ]
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These are lists of all tornadoes that have been confirmed by local offices of the National Weather Service in the United States in 2009. List of United States tornadoes from January to March 2009; List of United States tornadoes in April 2009; List of United States tornadoes in May 2009; List of United States tornadoes in June 2009