First Alert Weather: Arctic air brings dangerously cold conditions to Oregon and Idaho mid-week, with snow arriving Thursday
An arctic front and associated pool of frigid air is set to move southward into the Gem State on Tuesday and linger through early Thursday.
Extreme cold warning issued for over 1 million Americans in the West, upper Midwest
More than one million people in eastern Montana and the Dakotas are under extreme cold warnings on Monday and Tuesday.