By Sunday evening at 5 p.m., WOWT detected that a tornado had hit Omaha early Sunday morning.Empty-headed anchor John Knicely was on the scene within 15 hours of the storm, telling stories that KETV had covered on its 7 a.m. newscast.At 10 p.m., Chief Ejacucaster Jim Flowers—with nary a giggle—apologized for the station's coverage, but then began backpedaling almost immediately. He and Mike