In some parts of the Plains region, the National Weather Service expects temperatures to reach as low as the negative 20s and 30s.

A high-pressure system is pushing Arctic air into the central U.S. this week. Much of the country will experience plunging temperatures, while states such as Kansas and Missouri could see heavy snow.

Kentucky Gov. Andy Beshear said all of the state's 120 counties were impacted by the storm. "The biggest challenge of this event is it's everywhere."

The weather phenomena are common for California winters, but they could cause dangerous debris flows or mudslides in recently burned areas.

Heavy West Coast rain means mudslides threaten fire-ravaged California. Millions of Americans elsewhere get snow, rain, extreme cold and some tornadoes.

Break out those shovels, because storms are about to dump a mess of snow and ice on a large part of the U.S. As of noon Tuesday, at least 20 states were under winter warnings or advisories.

A mix of snow and ice blanketed a large swath of the northern U.S. over the weekend, after a major winter storm hit parts of the Upper Midwest, the Great Lakes region and the Northeast.

Every day through Feb. 7, two federal and state agencies will focus on a specific step you can take to prepare for tornadoes, severe thunderstorms and more.

Parts of the South will see high temperatures while upper parts of the U.S. will see wintry weather.

The weather-predicting groundhog celebrity has met two presidents and drinks a life-extending elixir: "Our Phil is like, probably 139 years old," Groundhog Club Inner Circle President Tom Dunkel says.

Last year was a hot one in Georgia but last week’s snow is not evidence we’re headed in a different direction, Georgia scientists say.

Freezing temperatures can kill off dormant agricultural disease.

Okay, Georgia, we have snow, and it’s colder here than it’s been in a very long time. These conditions are so unusual for us, it makes Southerners, unaccustomed to extreme winter weather, wonder just how bad we have it at the moment.

The National Weather Service in Peachtree City is warning Georgians to stay off roads across large portions of the state. 2 to 6 inches of snow is expected to fall in the Southwest region of the state, with 0 to 1 inch or more in Atlanta and suburbs. 

Heavy snow, sleet and ice are making travel conditions treacherous across the region, stretching from Houston into the Florida panhandle.