Meanwhile, a swath of the Central and Eastern U.S. was under winter weather advisory, which the NWS issues "for any amount of freezing rain, or when 2 to 4 inches of snow (alone or in combination with sleet and freezing rain), is expected to cause a significant inconvenience, but not serious enough to warrant a warning."

Winter weather advisories and ice storm warnings are in effect for some areas. Here's difference in weather safety terms: warnings, watches, advisory

On Thursday at 12:49 p.m. the National Weather Service issued an updated winter weather advisory valid from 4 p.m. until Friday 4 p.m. for Oregon Lower Treasure Valley as well as Harney, Baker and Malheur counties.