The frigid January temperatures resulted in the coldest start to the year in over a decade. A preliminary look at temperature ...

In 2000, residents of the Portland area had to wait until January 16th for the first inch of snow marked as the latest first ...

When there are disturbances in which the Jet Stream weakens, it can become wobbly. This allows the cold air to plunge southwards. A disrupted polar vortex does not happen every year. Very much so what ...

As the polar vortex delivered what is expected to be its final blast across southern Ontario on Wednesday, city residents braved the bitter cold — including Fintan the lion at the Toronto Zoo.

The weather forecast predicts a harsh polar vortex sweeping into Niagara-on-the-Lake until Wednesday, with temperatures that could dip to -15 C and expected to go lower near the lake.

Residents across the country from the Northern Plains to the tip of Maine are bracing for dangerously low temperatures ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

A polar vortex is slated to sweep most of the continental ... and west of the I-95 corridor to West Virginia and down East Maine with up to 8 inches expected. Before leaving exiting the U.S ...