Tornado Alley
It has also been asserted that there are numerous Tornado Alleys. In addition to the Texas/Oklahoma/Kansas core, such areas include the Upper Midwest, the lower Ohio Valley, the Tennessee Valley and the lower Mississippi valley. Some studies suggest that there are also smaller tornado alleys located across the United States.
Norman, Oklahoma
Norman lies within Tornado Alley, the region of the United States where tornadic activity is most frequent. The city has a tornado season lasting from March through June, with over 80% of all reported tornadoes occurring during these months. The Oklahoma City metropolitan area, including Norman, is the most tornado-prone area in the United States. As recently as May 10, 2010, a tornado outbreak occurred in southeastern Norman that resulted in the loss of multiple homes and businesses. On April 13, 2012 Norman was struck by a weak tornado. On May 6, 2015, the northwestern part of Norman was hit by a weak tornado.