In the Northeast, millions of Americans are under winter weather alerts as a winter storm brings ice and heavy snow, with up to a foot expected in northern Pennsylvania and central New York. Janai Norman has the latest.

Surprise Winter Storm Is Coming! - #shorts

Heavy Rain from Atmospheric River in the PNW

Atmospheric River's Strength As Seen From Space

Temperatures drop to -49°F in world's coldest major city

Atmospheric river in Washington causes historic flooding

Western Washington experienced extreme weather this week, with areas getting 2 to 12 inches of rain in just 72 hours, forcing more than 100,000 residents into evacuation zones.

Southern Ontario hit with blast of winter weather ❄️

After days of heavy rain and flooding from an atmospheric river, Washington faces a long road to recovery. #pacificnorthwest #flooding #washington