Tornado counts are considered preliminary until final publication in the database of the National Centers for Environmental Information.
[1] On average, there are 119 confirmed tornadoes in the United States in July and 81 in August.
[2] The northern states nearer the Canadian border are most favored for tornadoes in July and August, including the Upper Midwest, the Great Lakes and the Northeastern states, due to the positioning of the summertime jet stream.
[3] In addition, there can also be occasional increases in the southern and eastern United States as a result of tornadoes from landfalling tropical cyclones should such occur, especially in August.
[4] With 111 confirmed tornadoes, July saw near average levels of tornadic activity.