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

The cold air coming in from Siberia ... weekend and the high temperature only reaching 26 degrees Monday. The polar vortex is a large area of low pressure and cold air that always exists in ...

When the Polar Vortex is in a weakened state, a jet stream wobble sending polar air into the mid-latitudes becomes more ...

One of the key players in these dramatic shifts is something called the polar vortex. The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the ...

January has already been colder than average in most states east of the Rocky Mountains for the first time in two years — and now, more frigid air is coming. A lobe of the polar vortex ...

You may have seen social media posts about it and chatter of big weather pattern changes heading our way, but what's really ...

The vortex is essentially an area of low pressure in the upper layers of the atmosphere over the polar region up north. This ...

SALT LAKE CITY — Cities across the U.S. are bracing for cold temperatures as a polar vortex arrives, bringing temperatures down to much below normal for mid-to-late January. Parts of Utah are on ...

The weather flow is gradually changing now and as we head into early February. Our storm systems will come from the west and ...

Midwest and finally the East in the coming days as arctic air dips down into the Lower 48 for a spell. The mere mention of the term "polar vortex" can set your head spinning (and maybe eyes rolling).