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.
Nebraska
Nebraska is located in Tornado Alley. Thunderstorms are common during both the spring and the summer. Violent thunderstorms and tornadoes happen primarily during those two seasons, although they also can occur occasionally during the autumn. The chinook winds from the Rocky Mountains provide a temporary moderating effect on temperatures in the state's western portion during the winter.