Preliminary data indicates it was an EF3 tornado, the weather service said, stronger than the EF2 estimate they made Monday.
More than 65 million people are in the path of severe weather expected to move in Tuesday night and into Wednesday from Houston to Philadelphia.
Mosquitoes are out in full force earlier than expected in Los Angeles and Orange counties after recent heavy rainfall.
More than 100 flights at LAX were canceled Monday as a major winter storm dumped more than a foot of snow across several states in the Northeast.
With the recent heavy rain leading to landslides and slope erosion, multiple sections of Angeles Crest Highway have been damaged and washed out.