The greater Philadelphia region will experience no weekend letup in the prolonged cold snap gripping the area.

(Reuters) - A dangerous weather phenomenon called a bomb cyclone that occurs in mid-latitudes - between Earth's tropics and the polar regions - can bring strong and damaging winds, torrential rains, heavy snowfall, flooding and frigid temperatures.

They are responsible for producing heavy rain and snow, especially when pushed up against mountain ranges like the Cascades and Sierra Nevada. A well-known type of atmospheric river is called a "Pineapple Express" because it flows from the Hawaiian Islands.

Fox News correspondent Madison Scarpino reports live from Charlotte as a bomb cyclone triggers widespread travel delays and flight cancellations across the East Coast on 'Fox News Live.'

In a one-two punch, a second bomb cyclone storm is forecast to hit the western US coast as Washington, Oregon, Idaho, and California are still dealing with power outages due to the current storm. Around 400,000 residents in the northwestern United States ...

Extreme winter weather hit parts of the Eastern Seaboard on Saturday, with the Carolinas bearing the brunt. Skyler Henry reports from Norfolk, Virginia.