Based on the 1991–2010 averaging period, 276 tornadoes occur across the United States throughout May, 243 in June, and 143 in July.
[1] The climatological peak for tornadic activity in the country, May features a risk area that is concentrated throughout the U.S. Great Plains, especially in the states of Texas, Oklahoma, and Kansas.
This is a shift from earlier months where the highest concentration of tornadoes is focused around the U.S. Gulf Coast.
[2] Tornado activity in June typically shifts more north and west across the Plains, especially Northern Colorado and the Texas Panhandle.
[8] Tornado counts listed below are considered preliminary until final publication in the database of the National Centers for Environmental Information.