A severe winter storm is expected to bring a glaze of ice, dangerously cold temperatures, and potentially a foot of snow to Oklahoma starting Friday.

Add Yahoo as a preferred source to see more of our stories on Google. When there's severe weather hitting Oklahoma, it may help to visualize the threat on maps and radars to make it easier to spot the ...

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