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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.)					Zinc Mines
	Less than 1	1–5	6–10	11–15	More than 15	Zinc Mines
District of Columbia		100%
Florida		64.2%	35.5%
New Hampshire	1.24%	98.7%
Rhode Island		99.3%
Vermont	77.1%	22.6%
Wyoming	87.7%	12.3%
North Dakota	29.5%	70.5%
Delaware		99.2%
Mississippi		10.9%	74.0%	15.1%
West Virginia	48.2%	51.8%
Nebraska		88.6%	11.4%
Louisiana		30.4%	69.5%
Hawaii	92.1%
Alabama		69.5%	16.4%	14.0%
Kansas		68.1%	31.5%
New Jersey	19.5%	80.3%
South Carolina		99.9%
Michigan	34.8%	64.8%
Connecticut		99.9%
Pennsylvania	6.15%	93.9%
Massachusetts		99.5%
Georgia		61.5%	38.5%
Maryland		99.3%
Oklahoma		3.41%	35.1%	46.0%	15.5%
Arkansas			87.2%	12.8%
Indiana		62.9%	37.1%
Minnesota	23.4%	72.5%	4.03%
Iowa		50.0%	50.0%
Alaska	99.8%					4
Arizona	92.2%	7.76%				69
Utah	100%					81
Yukon						5
Northwest Territories						2
Idaho	100%					65
Washington	99.9%					11
Nunavut						2
Montana	100%					39
Maine	40.0%	59.8%				2
Kentucky	4.42%	60.5%	35.1%			6
Nova Scotia						3
Virginia	10.3%	89.6%				2
Texas	16.8%	43.9%	36.9%		2.38%	2
Missouri		23.4%	62.5%	14.1%		6
North Carolina		99.9%				1
Oregon	100%					14
New Brunswick						5
New Mexico	90.2%	9.71%				24
Wisconsin	13.1%	53.1%	33.7%			3
British Columbia	2.52%					10
Newfoundland and Labrador						1
Colorado	69.4%	30.6%				247
Nevada	100%					16
New York	61.6%	38.3%				1
Québec						13
Manitoba						16
Tennessee		41.3%	58.7%			23
Ontario						16
California	99.9%					17
South Dakota	22.1%	76.0%	1.85%			2
Ohio	3.97%	96.0%				1
Illinois		70.3%	29.6%			5

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