Famed groundhog prognosticator Punxsutawney Phil has weighed in from central Pennsylvania: Six more weeks of winter.

January has been an unusually violent month for tornadoes in the USA: 70 twisters have been reported. And more could be on the way.

Authorities are still trying to determine what caused the horrific wreck south of Gainesville that killed at least 10 people and injured 18.

We'll likely see solar storm sequels, about one a month, say solar physics experts, for the next year or two.

The Northern Lights have lit up the skies above Scotland and northern England after a solar storm.

Rainstorms and strong winds across Texas have left thousands of people without electricity and facing the threat of worse conditions.

Some people have serious reactions if they are not careful. For one Minnesota kid, that means long days in the snow are out.

A new radar system is being installed at all 160 National Weather Service forecast offices around the USA.

Pacific Northwest residents face the prospect of a chilly weekend after a powerful snowstorm damaged power lines.

A strong La Nina kept the world cooler than it has been in 2011.

A monster Pacific Northwest storm coated Washington with freezing rain on Thursday and brought much of the state to a standstill.

An intense winter storm that pounded the Pacific Northwest with snow and wind Wednesday was just the first in an onslaught of storms.

Powerful spring-like storms have lashed parts of Kentucky with high winds that uprooted trees and downed power lines.

Crews are laying the "icework" for the final leg of a Russian tanker's mission to deliver fuel to the Alaskan town of Nome.

Heavy snow in parts of the Midwest and Northeast has put an end to the recent stretch of mild, springlike weather.

Heavy snow fell in Alaska's largest city Thursday, adding to what already has been the snowiest period for Anchorage on record.

At least 15 people were injured and at least 60 buildings were damaged when a possible tornado struck in western North Carolina.

Even in a year marked by severe storm outbreaks, lightning killed fewer Americans in 2011 than any year on record.

Thousands of people have lost power in Houston and roads have flooded after powerful thunderstorms dropped hail and several inches of rain.

The Texas drought has scientists alarmed, because they don't normally see dead birds so early in the season.

Dozens of National Guard troops have arrived in the Alaska fishing town of Cordova to help dig it out from massive snows.

Thursday was warmer in parts of South Dakota than in Miami, Florida.

A Welsh corgi showed up at the Montana motel where his owners had stayed, four days after one of them was killed in an avalanche.

The world endured its costliest year ever for losses from natural disasters.

The absence of snow across the country's midsection means less money is being spent on plowing, overtime, salt and sand

Rick Jervis, ...

From USA Today, comes an excellent description of the formation of tornadoes, by Josh Hatch, Bob Laird, Dave Merrill, Jerry Mosemak and Doyle ...