Tornadoes and flooding spawned by severe thunderstorms tore through parts of Oklahoma overnight, leaving at least 11 people injured and shredding homes and other properties.

According to the National Weather Service, four likely tornadoes touched down in northeastern Oklahoma and northwestern Arkansas.

Oklahoma experienced severe weather on Wednesday ... He warns that thunderstorms could generate winds exceeding 80 mph and produce “supercell” tornadoes—powerful, sustained storms capable ...

A supercell thunderstrom in Oklahoma. Image courtesy of NSSL/NOAA. The National Weather Service defines a severe thunderstorm as a thunderstorm that is producing: Hail that is at least quarter ...

Reflectivity of the supercell that produced the Moore, Oklahoma tornado on May 3, 1999. At the time of this radar scan, a tornado was on the ground. Image courtesy NWS. A tornado is a violently ...

Most of the remainder of north Texas and Oklahoma are included in a Level ... will sculpt early storms into rotating supercells. If a supercell is able to fire up east of the main line and remains ...

The watch includes Oklahoma City and surrounding cities southeast, affecting more than two million people. Supercell thunderstorms are firing off the same front that caused damage overnight.