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Average Number of Tornado Incidences per Year (U.S.)

North AmericaPhysical Environment

Tornado prevalence in the United States per 1,000 square miles per year

A map shows average tornado incidences per year in the U.S. The highest incidences (dark brown) are in Oklahoma, parts of Texas, Kansas, and Missouri. The lowest incidences (light yellow) are in Alaska, Washington, Oregon, and California.

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Display by:	Average Number of Tornado Incidences per Year (U.S.)					Sea-Surface Temperature Anomalies: El Niño					Salt Marshes	Farm Area (Acreage)
	Less than 1	1–5	6–10	11–15	More than 15	-0.25 to 0.25	0.75 to 1.0	1.0 to 1.25	1.25 to 1.5	1.5 to 1.75	Salt Marshes	Class	Rank	Acres
District of Columbia		100%
Nunavut						0.352%
Alabama		69.5%	16.4%	14.0%							0.174%		35	8.80e+6
Alaska	99.8%					0.318%							52	8.30e+5
Alberta													4	5.05e+7
Arizona	92.2%	7.76%											16	2.60e+7
Arkansas			87.2%	12.8%									25	1.38e+7
British Columbia	2.52%					0.126%					0.160%		42	6.45e+6
California	99.9%					0.110%					0.156%		18	2.55e+7
Colorado	69.4%	30.6%											11	3.17e+7
Connecticut		99.9%									0.797%		58	4.40e+5
Delaware		99.2%				0.762%					33.7%		56	5.00e+5
Florida		64.2%	35.5%			0.596%					1.33%		33	9.45e+6
Georgia		61.5%	38.5%								2.72%		34	9.30e+6
Hawaii	92.1%					1.74%	1.20%	0.113%	0.444%	2.10%			49	1.12e+6
Idaho	100%												28	1.18e+7
Illinois		70.3%	29.6%										15	2.69e+7
Indiana		62.9%	37.1%										22	1.47e+7
Iowa		50.0%	50.0%										12	3.05e+7
Kansas		68.1%	31.5%										5	4.60e+7
Kentucky	4.42%	60.5%	35.1%										26	1.30e+7
Louisiana		30.4%	69.5%			0.184%					0.106%		39	7.75e+6
Maine	40.0%	59.8%				0.133%					0.322%		47	1.45e+6
Manitoba													19	1.80e+7
Maryland		99.3%				0.874%					0.178%		46	2.02e+6
Massachusetts		99.5%				1.78%					3.30%		55	5.20e+5
Michigan	34.8%	64.8%											32	9.95e+6
Minnesota	23.4%	72.5%	4.03%										17	2.59e+7
Mississippi		10.9%	74.0%	15.1%							0.461%		31	1.08e+7
Missouri		23.4%	62.5%	14.1%									14	2.83e+7
Montana	100%												3	5.97e+7
Nebraska		88.6%	11.4%										6	4.52e+7
Nevada	100%												43	5.96e+6
New Brunswick						0.522%					0.488%		51	9.38e+5
New Hampshire	1.24%	98.7%									1.37%		57	4.70e+5
New Jersey	19.5%	80.3%				0.329%					15.3%		53	7.20e+5
New Mexico	90.2%	9.71%											8	4.32e+7
New York	61.6%	38.3%				0.105%					0.102%		41	7.20e+6
Newfoundland and Labrador						0.392%							59	7.73e+4
North Carolina		99.9%				0.319%					0.191%		36	8.30e+6
North Dakota	29.5%	70.5%											9	3.92e+7
Northwest Territories													62	869
Nova Scotia						0.847%					0.591%		50	1.02e+6
Ohio	3.97%	96.0%											24	1.40e+7
Oklahoma		3.41%	35.1%	46.0%	15.5%								10	3.42e+7
Ontario													27	1.27e+7
Oregon	100%												20	1.64e+7
Pennsylvania	6.15%	93.9%											40	7.70e+6
Prince Edward Island						1.25%		0.264%			1.22%		54	5.94e+5
Québec													37	8.26e+6
Rhode Island		99.3%				4.64%					2.01%		60	7.00e+4
Saskatchewan													2	6.16e+7
South Carolina		99.9%									6.81%		44	5.00e+6
South Dakota	22.1%	76.0%	1.85%										7	4.33e+7
Tennessee		41.3%	58.7%										30	1.09e+7
Texas	16.8%	43.9%	36.9%		2.38%	0.183%					0.123%		1	1.30e+8
Utah	100%												29	1.10e+7
Vermont	77.1%	22.6%											48	1.25e+6
Virginia	10.3%	89.6%				0.126%					0.493%		38	8.10e+6
Washington	99.9%					0.513%					0.132%		21	1.47e+7
West Virginia	48.2%	51.8%											45	3.60e+6
Wisconsin	13.1%	53.1%	33.7%										23	1.44e+7
Wyoming	87.7%	12.3%											13	3.04e+7
Yukon													61	2.63e+4

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