A tornado was reported to have touched down today in Norman, OK, a town roughly 20 miles south of Oklahoma City and home to the University of Oklahoma and the National Storm Prediction Center. Early reports noted gas leaks throughout the town, and a power outage affecting most of the residents of Norman. The class of the tornado does not yet appear to have been determined, but it was apparently hidden by rain, making it more deadly.
This tornado is just the first of an outbreak expected to occur tonight and into tomorrow as supercells form across both Oklahoma and Kansas.
The above picture from the Weather Channel clearly shows the front moving through both of these states. Any tornadoes could be on the ground for a while, since the thunderstorms spawning them will be continuously traveling ahead of the front.
According to NOAA, March 2012 recorded 223 tornadoes, 143 more than the usual average of 80.
Information in this post was found here.