Debris ball is getting ready to move into SW Jefferson Co. It is moving toward North Johns, Bessemer, and into the Birmingham Metro Area if it continues on the ground.
UPDATE: 5:32PM Central time: I'm shocked there is no warning of any kind for Jefferson Co., Alabama. This tornado is getting uncomfortably close the southwest part of Jeff Co. and I suggest being prepared to take cover. The debris ball at this time is about 2 mi. SE of Burchfield. I'll post a new image momentarily.
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A pronounced "debris ball" -- a signature of a tornado on the ground -- is southwest of Birminham (between Hold and Cottondale) and moving northeast. This is a terribly dangerous situation!
The debris ball is caused by the tornado lofting debris into the air where it reflects high amounts of the radar's energy.