As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is it?

Last weekend's winter storm dumped snow and ice across the South, but some people also experienced loud booms and felt their homes shake because of a weather phenomenon called "frost quake." ...

Parts of the U.S. were under a freezing fog warning this week. What is the weather phenomenon?

"Thundersnow can be found where there is relatively strong instability and abundant moisture above the surface," says the ...

Did you notice the stunning, colorful sight in the sky Monday morning? It wasn’t a rainbow. It’s called a sundog, a weather phenomenon that only happens when the conditions are just right. But what ...

In a typical summertime thunderstorm, warm, moist air rises rapidly into the atmosphere, where it hardens into ice crystals, ...

The state weather bureau on Monday clarified the “viral misinformation” circulating on social media about the so-called “Aphelion Phenomenon” and its supposed correlation to the cold weather.

Weather phenomenon exposes Lake Erie's floor amid strong winds Video captured the aftermath of the phenomenon known as a seiche, which occurs when strong winds push a body of water back and forth.

No, it's not an earthquake. The winter phenomenon is a seismic event caused by a sudden cracking in frozen soil or rock saturated with water or ice.

The polar vortex is sending arctic blasts and chilly temperatures to most of the United States, and states from Texas to Oklahoma could see snow, sleet and ice. As of Wednesday, Jan. 21, millions of ...