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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	Major Territorial Acquisitions (U.S.)
	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	Extent of U.S., 1803	Louisiana Purchase, 1803	West Florida, 1810–1813	British Cession, 1818	East Florida, 1819	Northern Maine, 1842	Texas Annexation, 1845	Oregon Country, 1846	Mexican Cession, 1848	Gadsden Purchase, 1853	Alaska, 1867	Hawaii, 1898
Nunavut						0.352%
Newfoundland and Labrador						0.392%
Nova Scotia						0.847%					0.591%
Prince Edward Island						1.25%		0.264%			1.22%
New Brunswick						0.522%					0.488%
Alaska	99.8%					0.318%																94.5%
Arizona	92.2%	7.76%																		76.2%	23.8%
Utah	100%																			100%
District of Columbia		100%										97.6%
Florida		64.2%	35.5%			0.596%					1.33%					98.3%
Idaho	100%																		99.8%
New Hampshire	1.24%	98.7%									1.37%	99.9%
Rhode Island		99.3%				4.64%					2.01%	97.7%
Vermont	77.1%	22.6%										99.9%
Washington	99.9%					0.513%					0.132%								99.4%
Wyoming	87.7%	12.3%											70.3%					4.53%	12.4%	12.7%
Montana	100%												82.4%						17.6%
Maine	40.0%	59.8%				0.133%					0.322%	82.4%					16.6%
North Dakota	29.5%	70.5%											57.6%		42.4%
Kentucky	4.42%	60.5%	35.1%									99.9%
Virginia	10.3%	89.6%				0.126%					0.493%	99.5%
Delaware		99.2%				0.762%					33.7%	98.0%
Mississippi		10.9%	74.0%	15.1%							0.461%	92.2%		7.44%
West Virginia	48.2%	51.8%										100%
Nebraska		88.6%	11.4%										100%
Texas	16.8%	43.9%	36.9%		2.38%	0.183%					0.123%							99.5%
Missouri		23.4%	62.5%	14.1%									99.7%
Louisiana		30.4%	69.5%			0.184%					0.106%		86.4%	12.4%
Hawaii	92.1%					1.74%	1.20%	0.113%	0.444%	2.10%													91.5%
North Carolina		99.9%				0.319%					0.191%	99.2%
Oregon	100%																		99.8%
Alabama		69.5%	16.4%	14.0%							0.174%	95.7%		4.16%
New Mexico	90.2%	9.71%																57.5%		40.3%	2.23%
Kansas		68.1%	31.5%										91.7%					8.26%
Wisconsin	13.1%	53.1%	33.7%									99.8%
British Columbia	2.52%					0.126%					0.160%											1.43%
New Jersey	19.5%	80.3%				0.329%					15.3%	99.0%
South Carolina		99.9%									6.81%	99.6%
Michigan	34.8%	64.8%										99.9%
Connecticut		99.9%									0.797%	99.6%
Pennsylvania	6.15%	93.9%										100%
Colorado	69.4%	30.6%											41.3%					32.3%		26.4%
Nevada	100%																			99.9%
Massachusetts		99.5%				1.78%					3.30%	98.1%
Georgia		61.5%	38.5%								2.72%	99.8%
New York	61.6%	38.3%				0.105%					0.102%	99.4%
Maryland		99.3%				0.874%					0.178%	96.9%
Oklahoma		3.41%	35.1%	46.0%	15.5%								91.6%					8.45%
Tennessee		41.3%	58.7%									99.9%
California	99.9%					0.110%					0.156%									99.7%
Arkansas			87.2%	12.8%									99.8%
South Dakota	22.1%	76.0%	1.85%										99.1%
Ohio	3.97%	96.0%										100%
Indiana		62.9%	37.1%									100%
Minnesota	23.4%	72.5%	4.03%									33.8%	45.1%		20.9%
Iowa		50.0%	50.0%										99.8%
Illinois		70.3%	29.6%									99.7%

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