On May 20, 2013 central Oklahoma, USA, was hit by a supercell thunderstorm resulting in a destructive tornado passing over the state.
NASA and NOAA are working on a new satellite system which will be launched in late 2015 for the Geostationary Operational Environmental Satellite-R Series (GOES-R).
On Jan. 22 and 23, 2012, more than 37 tornadoes struck the southern USA. Ten of them tore across the Lower Mississippi Valley into Alabama. Worst hit were St.
Tornadoes are expected to accompany severe storms in the springtime in the U.S., but this time of year they also usually happen.
The April 27, 2011, tornado outbreak was the second-deadliest in U.S. history, and the deadliest since the Doppler Radar system has been used to warn communities.
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