After highs Tuesday and Wednesday of 19 and Thursday of 30, Friday’s forecast for the Baltimore area calls for a mostly sunny ...

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 ...

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

This blast of frozen temperatures is tied to a polar vortex... but what is that? Air spins around the notoriously cold North and South Poles. When the air is spinning fast, it's stable, but when it is ...

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout the Milwaukee area closed as the area braced for the dangerous freezing ...

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

Another blast of winter weather is expected in parts of the U.S. in the coming days, including bone-chilling wind in the ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

It's going to get cold in Tennessee. Meteorologists predict freezing temperatures for much of the state. Here's the latest.

The polar vortex is always around. It is a channel of strong winds high up in the atmosphere that circles the poles. One over ...