[Updated at 9 p.m. CT]
A mother and baby have been confirmed killed when several tornadoes, including a large twister, touched down in the Oklahoma City metro area. A large and powerful storm system moved through the vicinity of Oklahoma City and Moore, which was devastated two weeks ago. Softball-sized hail, heavy flooding and straight line winds were reported throughout the region. Many warnings have been issued for cities and towns along the track of the storm system, including St. Louis, Missouri.
Yahoo News is following the latest developments via social media from meteorologists, storm chasers and government officials. We welcome your comments, especially if you have firsthand information about this dangerous storm.