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In late 2023, American meteorologist and tornado expert Thomas P. Grazulis created the Outbreak Intensity Score (OIS) as a way to rank tornado outbreaks. [1] [2] For the score, only significant tornadoes are counted: F2/EF2 tornadoes receive 2 points each, F3/EF3 tornadoes receive 5 points each, F4/EF4 tornadoes receive 10 points each, and F5/EF5 tornadoes receive 15 points each. [1]
The drought began on May 20, 2013, following the dissipation of the 2013 Moore, Oklahoma EF5 tornado. [11] [12] Several tornadoes since the Moore EF5 have reached the 200 miles per hour (320 km/h) wind speeds needed for a tornado to be classified as an EF5, including the 2013 El Reno EF3 tornado and 2015 Rochelle–Fairdale EF4 tornado, with wind speeds measured in excess of 295 miles per hour ...
The average tornado moves Southwest to Northeast in the U.S., but tornadoes have been known to move in any direction. The average forward speed of a tornado is 30 miles per hour (48 km/h), but has varied from stationary to 70 mph (110 km/h). Tornadoes can also accompany tropical storms and hurricanes as they move onto land.
Elementary and middle school principals are taking stock and will huddle with district officials in the 8 o'clock hour. Petley said the district is currently taking things on a school-by-school basis.
A damaged sign lies outside the wreckage of Plaza Towers Elementary School, where seven children were killed when a tornado hit Moore, Oklahoma, in May 2013. (AP Photo/Charlie Riedel) A decade ago ...
Morgan Elementary School The tornado struck the school, destroying several classrooms and throwing cars on top of the building. Fortunately, the children and faculty, who were huddled in the hallways, were not injured. A woman was crushed by a school bus that flew into a ditch she was sheltering in. [4] [5] [6] 1974 Xenia tornado: F0–F5 [a]
In 1979, Grazulis began working with the Nuclear Regulatory Commission (NRC) to create a history of tornadoes. Specifically, he refined and augmented the databases of tornadoes maintained by the National Severe Storms Forecast Center (NSSFC) in Kansas City, Missouri, as well as the database headed by Ted Fujita at the University of Chicago, with whom he collaborated in developing their ...
The Mayfield Consumer Products factory was the third-biggest employer in this corner of western Kentucky, an important economic engine that churned out candles that lined the shelves of malls ...