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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 Industrial Centers
	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	Akron	Boston	Chicago	Dallas	Detroit	Hamilton	Hollywood	Kansas City	Los Angles	Ottawa	Philadelphia	Pittsburg	Quebec	San Francisco (Silicon Valley)	Sarnia	Seattle
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%
Oregon	100%
New Mexico	90.2%	9.71%
Kansas		68.1%	31.5%
Wisconsin	13.1%	53.1%	33.7%
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%
Indiana		62.9%	37.1%
Minnesota	23.4%	72.5%	4.03%
Iowa		50.0%	50.0%
Alaska	99.8%					0.318%
Nunavut						0.352%
Hawaii	92.1%					1.74%	1.20%	0.113%	0.444%	2.10%
Newfoundland and Labrador						0.392%
Florida		64.2%	35.5%			0.596%					1.33%
New Hampshire	1.24%	98.7%									1.37%
Rhode Island		99.3%				4.64%					2.01%
Maine	40.0%	59.8%				0.133%					0.322%
Nova Scotia						0.847%					0.591%
Virginia	10.3%	89.6%				0.126%					0.493%
Delaware		99.2%				0.762%					33.7%
Prince Edward Island						1.25%		0.264%			1.22%
Mississippi		10.9%	74.0%	15.1%							0.461%
Louisiana		30.4%	69.5%			0.184%					0.106%
North Carolina		99.9%				0.319%					0.191%
New Brunswick						0.522%					0.488%
Alabama		69.5%	16.4%	14.0%							0.174%
British Columbia	2.52%					0.126%					0.160%
New Jersey	19.5%	80.3%				0.329%					15.3%
South Carolina		99.9%									6.81%
Connecticut		99.9%									0.797%
Georgia		61.5%	38.5%								2.72%
New York	61.6%	38.3%				0.105%					0.102%
Maryland		99.3%				0.874%					0.178%
Washington	99.9%					0.513%					0.132%																1
Texas	16.8%	43.9%	36.9%		2.38%	0.183%					0.123%				1
Missouri		23.4%	62.5%	14.1%															1
Michigan	34.8%	64.8%														1
Pennsylvania	6.15%	93.9%																				1	1
Massachusetts		99.5%				1.78%					3.30%		1
Québec																								1
Ontario																	1				1					1
California	99.9%					0.110%					0.156%							1		1					1
Ohio	3.97%	96.0%										1
Illinois		70.3%	29.6%											1

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