ScienceDesk, 
The U.S. National Weather Service issues tornado warnings, watches and emergencies. Do you know the difference between the three terms?
AP explains: https://flip.it/kO4VDw
ScienceDesk, The U.S. National Weather Service issues tornado warnings, watches and emergencies. Do you know the difference between the three terms?
AP explains: https://flip.it/kO4VDw