Tornado Outbreak Warning for the US This Weekend

Storm watchers in the US are warning of a major tornado outbreak this weekend after part of Oklahoma was hit by a twister that ripped roofs from buildings and tore down power lines.

Residents were told to take cover in basements as the tornado struck in Norman, a town of 110,000, on Friday.

Trees were uprooted and City Hall was among the buildings damaged.

Forecasters say another swarm of twisters may be on the way, with heavily populated areas such as Oklahoma city and Wichita, in Kansas, among the areas at risk. Read More