Ten state have this distinction. Looking at data from the period of 1991-2010 over which tornado statistics have been accurately recorded, the following states have averaged 21-40 tornadoes per year:
Note that these are only averages, in any given year a state may have more or fewer tornadoes, possibly outside of the 21-40 range.
It varies from year to year, but on average Kentucky gets 22 tornadoes annually.
Tornadoes are not particularly common in Pennsylvania. The state averages about 17 per year which is not very much, especially since most of them are weak. The worst tornado event to affect the state was on May 31, 1985 when 21 tornadoes, including the state's only recorded F5, tore through northern Pennsylvania claiming 65 lives.
Based on data from the years 1981-2010, the following states average in the range of 20-30 tornadoes per year North Dakota (29 tornadoes per year on average) Georgia (27) North Carolina (26) Wisconsin (23) Tennessee (21) South Carolina (21) Most states average fewer than 20 tornadoes per year and several average more than 30. Note that these figures are only averages, and that in any given year a state may have significantly more or fewer tornadoes than its average. For example, Tennessee eexperienced no less than 92 tornadoes in 2011.
The states states fit this criterion based on tornado data averaged from the years 1991-2011 are: South Dakota (35 tornadoes per year) North Dakota (34) North Carolina (33) Georgia (31) Tennessee (29) South Carolina (27) Wisconsin (25) Indiana (24) Kentucky (22) Note that these are only averages, and the number of tornadoes in a state from year to year can vary greatly.
Very likely. June is the peak month of tornado activity in Nebraska On average Nebraska gets 57 tornadoes per year of which 21 (37%) occur in June. Of course actual activity varies from year to year.
There were 21 recorded tornadoes in Georgia in 2006.
There were 21 confirmed tornadoes in Georgia in 2006.
There were 21 confirmed tornadoes in Colorado in 2011.
based on tornado data averaged from the years 1991-2011 are 9 such states. They are: South Dakota (35 tornadoes per year) North Dakota (34) North Carolina (33) Georgia (31) Tennessee (29) South Carolina (27) Wisconsin (25) Indiana (24) Kentucky (22) Note that these are only averages, and the number of tornadoes in a state from year to year can vary greatly.
It is Texas that records the most tornadoes, with an average total of about 135 a year. Kansas has the most tornadoes per area (or per square mile). Recall that Texas has a lot more area than the other states in tornado alley.
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Worldwide tornadoes killed 44 people in 2009, of which 21 were in the U.S.