The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar vortex invasions, meteorologists warn. And it will stay frozen there all next week.

The U.S. is set to feel the impacts of an Arctic polar vortex next week, meteorologists have warned, with sub-zero temperatures possible across much of the country. Meteorologists explained that polar vortex intrusions are usually not disruptive,

We are tracking the return of the polar vortex next week as a wavy jet stream brings a blast of Arctic air to the Great Lakes.

Northern California is bracing for another winter storm this week, which is set to bring heavy rain and snow and impact holiday travelers. Here's the timing and totals we're expecting.

Snow, ice and freezing rain are likely to continue impacting roads and schools until a widespread warmup midday Friday across the Willamette Valley.

Snow, ice and freezing rain are likely to continue impacting roads and schools until a widespread warmup midday Friday across the Willamette Valley, National Weather Service meteorologists said. Temperatures don’t appear likely to rise above freezing in a meaningful way until Friday,

The National Weather Service has issued an ice storm warning for the Willamette Valley through early Friday. Follow our live updates.