Winter storm warnings have been issued in four states: Oregon, Washington, California and Minnesota. In northwestern Oregon and parts of Washington, including the Willapa Hills, there will be light snow showers until midnight Friday. Cities impacted include Mary's Peak, Brooklyn, Sunset Summit, Wilson River Summit, Valsetz, and Horton.

An updated winter storm warning was issued by the National Weather Service on Thursday at 3:45 a.m. valid from 10 a.m. until Friday 10 a.m. for Klamath Basin.

In Northern and Central Indiana, NWS issues a winter weather advisory for snow if 3 to 4 inches could fall within 12 hours, or 2 to 4 inches if it poses a significant impact. For Southern Indiana, according to NWS, a winter weather advisory for snow is issued if less than 4 inches of snow could fall in 12 hours. Story continues after photo gallery.

Punxsutawney Phil made his annual prediction in Pennsylvania, and the groundhog saw a shadow, meaning the United States is set for six more weeks of winter.

On Wednesday at 2:48 p.m. the National Weather Service issued a winter storm warning valid from Thursday 4 p.m. until Friday 10 a.m. for Central and Eastern Lake County.

As a second atmospheric river takes aim at Northern California, the Sacramento office of the National Weather Service issued a Winter Storm Warning for Monday through Wednesday

More than half the country was under winter weather-related warnings from the National Weather Service (NWS) Wednesday morning, with forecasters anticipating up to 22 inches of snow in some areas. Snow can disrupt travel and create dangerous driving conditions,

On Wednesday at 2:48 p.m. the NWS Medford OR issued a winter weather advisory valid from Thursday 4 p.m. until Friday 10 a.m. The advisory is for Central Siskiyou County and Northeast Siskiyou and Northwest Modoc counties as well as Modoc County.