A pair of storm systems sweeping across the country this week will bring snow, ice and thunderstorms, forecasters said.

The National Weather Service issued an updated winter storm warning at 4:15 p.m. on Monday valid from Tuesday 4 p.m. until Thursday 10 a.m. for South Central Oregon Cascades.

Millions of Americans live in areas under winter storm alerts stretching from northern Minnesota to the Eastern Seaboard.

On Monday at 11:26 p.m. the NWS Seattle WA issued an updated winter storm warning valid from Tuesday 4 a.m. until Thursday 4 p.m. The warning is for Cascades of Whatcom and Skagit counties, Cascades of Snohomish and Northern King counties,

A winter storm warning was released by the National Weather Service on Monday at 1:55 p.m. valid from Tuesday 4 p.m. until Thursday 10 a.m. for Eastern Douglas County Foothills.

A powerful winter storm system moving across the Great Lakes and Northeast is bringing snow and ice, frigid temperatures and possible whiteout conditions.

Social-media users were sympathetic toward the passengers, with one saying: "This would be my personal nightmare."

The recent California storms have filled many of the state's largest reservoirs including Lake Shasta, Lake Oroville and Lake Berryessa.