The process of tornado formation begins with colliding air masses that create instability in the atmosphere, producing ...

A tornado reduced homes in Paragould, Ark., to rubble — less than a year after another twister touched down on the same ...

The Joplin EF-5 ranks as the seventh deadliest tornado to ever hit the US, and is the only storm from the 2000's to sit ...

A powerful storm continued moving through Southern California on Thursday, March 13. During the overnight hours, Pico Rivera ...

The scale ranked these tornadoes from F0 (weakest) to F5 (strongest). The exact rank is determined by meteorologists and engineers after conducting surveys of damage from a particular storm.

According to the National Weather Service, the tornado developed near Pico Rivera between 3 a.m. and 4 a.m. Thursday.

See a gallery of the storm damage below. The NWS confirmed the tornado was an EF0. While it's the weakest on the Enhanced Fujita scale, it can still cause significant damage. What they're saying ...