After a record cold spring, all-time high temperature records were broken in Alaska as a "heat dome" took control.
Tropical Storm Andrea is weakening, but is dumping very heavy rain from South Carolina northeastward to Maine.
As Andrea marches up the East Coast, NASA released a stunning animation of last year's most devastating storm.
Tropical Storm Andrea in the Gulf of Mexico threatens to spread heavy rain from Miami to Massachusetts.
The NWS determined that the El Reno, Okla., tornado was 2.6 miles wide, the widest ever recorded.
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.