A tornado watch has been issued for the entire region until midnight. This is a particularly dangerous situation (PDS).

or PDS, tornado warnings in effect. The first is near Lake City, where a tornado emergency has just been issued -- impacting parts of Craighead and Poinsett counties and potentially crossing right ...

Tornado watches are issued for large areas if tornadoes are possible. A warning is issued for a smaller area when a tornado has been spotted.