The U.S. recorded the most tornadoes in at least a decade this year. Researchers are trying to figure out why.

A powerful winter storm battered the Bay Area Friday night into Saturday, causing widespread issues, power outages and downed ...

The National Weather Service (NWS) issued the historic warning for parts of downtown San Francisco and northern San Mateo County shortly before 6 a.m. on Saturday, citing radar data that showed a ...