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The increasingly conducive environment prompted the SPC to issue a tornado watch across southern Louisiana and Mississippi, valid from 7:55 a.m. CST (13:55 UTC) to 2:00 p.m. CST (21:00 UTC); forecasters assessed a 50% chance of two or more tornadoes in the watch box, but only a 20% chance of one or more strong (EF2+) tornadoes.
4 Tornado outbreak of April 30 – May 2, 2010 – A high risk was issued at 13Z on the second day of the aforementioned outbreak for a 30% probability of significant tornadoes, and was subsequently maintained. Only 11 weak tornadoes were confirmed during the day, but several strong tornadoes, one of which was rated EF3, occurred overnight ...
Hales suggested the PDS option to identify areas where, a few times each year, conditions are most likely to aid in the development of large and intense tornadoes. The first PDS tornado watch was issued by Robert H. Johns for the April 2, 1982 tornado outbreak across the southern and central Great Plains. [4]
The Moore, Oklahoma tornado of May 20, 2013, is the most recent tornado to be rated EF5 as of 2025. The Xenia, Ohio, F5 tornado of April 3, 1974.This was one of two tornadoes to receive a preliminary rating of F6, which was downgraded later to a rating of F5.
A TORCON level of 2 would mean a 20% risk of a tornado, TORCON 5 would be 50%, and so on. In this video from The Weather Channel , Forbes explains the TORCON system and how it's used.
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 ...
The tornado was the longest-tracked tornado of both the tornado outbreak and of the entirety of 1979 in the United States. Five people were injured. [ 14 ] [ 51 ] A 3 mi (4.8 km) wide swath of wind damage, with an intensity equivalent to an F0–F1 tornado, extended past the end of the tornado path and impacted the Marlow area.
The 2013 Moore tornado was a large and violent EF5 tornado that ravaged Moore, Oklahoma, and adjacent areas on the afternoon of May 20, 2013, with peak winds estimated at 210 miles per hour (340 km/h), killing 24 people (plus two indirect fatalities) [2] and injuring 212 others. [3]