Wintry conditions were forecast for at least 12 states across the U.S. on Friday, with some regions expecting up to 4 feet of snow. The storm poses a serious risk to travel, infrastructure, and public safety across a large portion of the country.

At 9:33 p.m. on Thursday, the National Weather Service issued an updated winter storm warning valid from Friday 8 a.m. until Sunday 11 p.m. for North Oregon Cascades.

Winter weather-related warnings were in place for at least 11 states early on Thursday, with National Weather Service (NWS) meteorologists anticipating up to four feet of snow to hit some parts of the country.