The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

The coldest air of the season will descend across the U.S. this weekend and early next week, bringing subzero wind chills ...

Arctic air will surge southward in the wake of this ... also on Saturday into Sunday." Temperature maps from multiple sources show freezing temperatures throughout the weekend and into next ...

According to the NWS Weather Prediction Center, the Arctic air will hit the Southern Plains and Ohio Valley ... Overall, about 300 million Americans are expected to be impacted by the vortex. A map ...

The Current Temperature map shows the current temperatures color ... resulting in the phenomenon of felt air temperature, which can differ at varying degrees from actual temperature.

Here's a map from the National Weather Service showing air temps at 4 a.m. Tuesday. NWS Twin Cities Here's a map from NOAA ...