PDS warnings were first used to warn of tornado outbreaks in the Midwest. More than a decade ago, three meteorologists ...

The particularly dangerous situation alert is relatively new to Southern California but has been issued before the recent wildfires that have caused devastation across LA County.

A swath of snow, sleet, and/or freezing rain could occur from the Texas Hill Country near San Antonio eastward along the I-10 Corridor to the Louisiana border. Snowfall totals could reach 1-2 inches.

A rare alert called a "Particularly Dangerous Situation" is in effect Wednesday for parts of fire-ravaged southern California ...