What made the Birmingham tornado a likely EF2 and not a more potent EF3? Kevin Laws, chief scientist with the National Weather Service’s Birmingham office explains the difference.

To read more about the damage the tornado caused, the cleanup and restoration that has taken place and the assessment from Gov. Robert Bentley, you can visit the Weather Center.

Kevin Laws, chief scientist for the National Weather Service’s Birmingham office, talks 2015 Christmas tornado from Alabama NewsCenter on Vimeo.