time that's ever happened in the city's history. >> yeah, also we got hail here. looks like snow but this is hail covering a backyard. this is in utah. north of salt lake city. let's get the latest on all this nastiness from abc's clayton sandell. >> reporter: a rash of tornados sweeping over oklahoma. >> the most significant of all tornado warnings that we can have. again, a tornado emergency. >> reporter: the storm system packing winds up to 150 miles per hour. meteorologists telling rush hour motorists to stay inside. >> i'm telling you, please stay at work, do not get on the highway. >> reporter: twisters cutting a path of destruction just south of oklahoma city. >> it's a lot of damage out here and it's still raining. >> reporter: farms, houses, all kinds of buildings destroyed. a shell is all that's left of the bridge creek fire department. >> buildings that are completely collapsed, power is out out here. >> reporter: the extreme weather system hitting nebraska and kansas. >> we have a large multiple-vortex tornado on the ground south of lincoln. >> reporter: sirens across the