Hard-hit Oklahoma may see more tornadoes as a severe weather outbreak affects at least a dozen states.
A tornado outbreak killed at least 1 and injured dozens more as twisters hit Oklahoma, Kansas and Iowa on Sunday.
Tornado season resumes after a long pause as at least 10 twisters left six dead and dozens injured in North Texas.
A rare May snowstorm shattered snowfall records in three states, while bringing the threat of more flooding.
An amazing 13-second NASA animation depicts how the globe has warmed during the period of 1950 to 2012.
A rare May snowstorm narrowly missed Minneapolis-St. Paul, dumping more than a foot of snow outside the cities.
A powerful cold front is ushering in record-breaking cold and snow from Colorado to Texas, and the Midwest.
After a very cold and snowy March, spring weather is about to arrive in earnest across the U.S.