The slang name for a tornado watch is "Watch Box" or even "Box".
The term "Watch Box" or "Box" is a term that is used by the National Weather Service to refer to a severe thunderstorm watch or tornado watch that is issued by the Storm Prediction Center or SPC.
Tornado watches are issued by the Storm Prediction Center for locations where tornadoes may occur.
The tornado watch area is often large and covers numerous counties and places and even states.
Tornado warning is when you should take action and take shelter as a tornado has been sighted or even indicated by weather radar.
A tornado warning is worse than a tornado watch.
Tornado Watch means that conditions are favorable for tornadoes to form.
The tornado watch is a heads up to stay alert and keep an eye on the weather, but there isn't one on the ground yet.
Tornado Warning is when a tornado has been sighted or detected by radar.
In order to determine if a tornado is approaching your location, you should pay attention to the sky for a dark, greenish or greenish black color and look out for a funnel cloud or a wall cloud, which is a lowering of the cloud base, which can rotate.
Also you should listen for any loud, roaring or freight train like sound and watch for a cloud of debris, even if a funnel is not visible to you.