Doppler radar has indicated a tornado possible west of Hays Kansas, about to cross I-70.
Tornado Watch boxes have gone up in Kansas, Eastern Colorado, Nebraska and Wyoming.
Tornado now northwest of Cheyenne Wyoming.
The trouble with this years tornadoes has been both their number, and that many are long-lived, giving them a greater chance of meeting up with a town.
May is the number one tornado month, followed by June. They can occur in any month, and in all of the 50 states.
Supercell – often associated with violent weather.