A tornado warning is issued when a tornado is either sighted or indicated on radar, meaning there is imminent danger to life and property.

Add Yahoo as a preferred source to see more of our stories on Google. Multiple tornado warnings hit Oklahoma early Thursday as a severe storm moved in. The first warning came during morning commutes ...

Researchers at the University of Kansas have shown the National Severe Storms Laboratory's Warn-on-Forecast System (WoFS) has potential to help weather forecasters issue warnings to emergency managers ...