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 ...

Thousands are without power as a major winter storm continues to barrel across the country, bringing snow and ice to New York.

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