A dancer doing various locking moves. Locking is a style of funk dance, which is today also associated with hip hop. The name is based on the concept of locking movements, which basically means freezing from a fast movement and locking in a certain position, holding that position for a short while and then continuing in the same speed as before.
A tornado warning is worse. It means that a tornado has been detected or the threat of one is imminent. A tornado watch means the overall conditions are favorable to form in a general area.
If a tornado watch is issued for your area, that means conditions are favorable for the formation of tornadoes. If a tornado warning is issued, that means that a tornado has been spotted or that radar is showing a possible tornado forming in a storm.