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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	Mean Sea-Surface Temperature
	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	-2.0 to 0.0	0.0 to 1.9	2.0 to 3.9	4.0 to 5.9	6.0 to 7.9	8.0 to 9.9	10.0 to 11.9	12.0 to 13.9	14.0 to 15.9	18.0 to 19.9	20.0 to 21.9	22.0 to 23.9	24.0 to 25.9	26.0 to 27.9	28.0 to 29.9
Arizona	92.2%	7.76%
Utah	100%
District of Columbia		100%
Idaho	100%
Vermont	77.1%	22.6%
Wyoming	87.7%	12.3%
Montana	100%
North Dakota	29.5%	70.5%
Kentucky	4.42%	60.5%	35.1%
West Virginia	48.2%	51.8%
Nebraska		88.6%	11.4%
Missouri		23.4%	62.5%	14.1%
Oregon	100%
New Mexico	90.2%	9.71%
Kansas		68.1%	31.5%
Pennsylvania	6.15%	93.9%
Colorado	69.4%	30.6%
Nevada	100%
Oklahoma		3.41%	35.1%	46.0%	15.5%
Tennessee		41.3%	58.7%
Arkansas			87.2%	12.8%
South Dakota	22.1%	76.0%	1.85%
Ohio	3.97%	96.0%
Indiana		62.9%	37.1%
Minnesota	23.4%	72.5%	4.03%
Iowa		50.0%	50.0%
Illinois		70.3%	29.6%
New Hampshire	1.24%	98.7%									1.37%
Mississippi		10.9%	74.0%	15.1%							0.461%
South Carolina		99.9%									6.81%
Alaska	99.8%					0.318%						0.243%			0.756%	0.368%
Northwest Territories												0.540%
Florida		64.2%	35.5%			0.596%					1.33%										0.797%	0.110%	0.317%	0.665%
Rhode Island		99.3%				4.64%					2.01%				4.89%
Washington	99.9%					0.513%					0.132%						0.825%
Nunavut						0.352%						2.12%
Maine	40.0%	59.8%				0.133%					0.322%					0.534%
Nova Scotia						0.847%					0.591%		1.84%	0.489%	0.275%	0.472%
Virginia	10.3%	89.6%				0.126%					0.493%					0.725%
Delaware		99.2%				0.762%					33.7%					1.06%
Prince Edward Island						1.25%		0.264%			1.22%		5.18%
Texas	16.8%	43.9%	36.9%		2.38%	0.183%					0.123%										0.214%
Louisiana		30.4%	69.5%			0.184%					0.106%										1.00%
Hawaii	92.1%					1.74%	1.20%	0.113%	0.444%	2.10%														10.0%	0.778%	4.46%
North Carolina		99.9%				0.319%					0.191%							0.239%	0.183%		0.286%
New Brunswick						0.522%					0.488%		0.647%			0.219%
Alabama		69.5%	16.4%	14.0%							0.174%										0.114%
Wisconsin	13.1%	53.1%	33.7%											0.545%
British Columbia	2.52%					0.126%					0.160%					1.06%
Newfoundland and Labrador						0.392%						1.04%	0.607%
New Jersey	19.5%	80.3%				0.329%					15.3%				0.163%	1.14%
Michigan	34.8%	64.8%												1.89%
Connecticut		99.9%									0.797%				0.194%
Massachusetts		99.5%				1.78%					3.30%				1.32%	2.66%						0.220%
Georgia		61.5%	38.5%								2.72%										0.230%
New York	61.6%	38.3%				0.105%					0.102%				0.265%	0.344%
Maryland		99.3%				0.874%					0.178%					2.09%
Québec												0.165%
Ontario														0.375%
California	99.9%					0.110%					0.156%								0.120%	0.206%

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