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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.)					Distribution of Calcium Carbonate in Modern Surface Sediments					Tropical Forests	Poor Urban Air Quality
	Less than 1	1–5	6–10	11–15	More than 15	0 - 20	20 - 40	40 - 60	60 - 80	80 - 100	Tropical Forests	Regina	Houston	Philadelphia	Oklahoma City	San Antonio	Boulder	Wichita	Portland	Irvine	Minneapolis	Boise	Winnipeg	Spring Hill	Greeley	St. Louis	Detroit	West Palm Beach	Columbus	Augusta	McAllen	Topeka	Las Cruces	Bakersfield	Oceanside	Reno	Indianapolis	Stockton	Baton Rouge	Glendale	Salinas	Trenton	Aurora	Modesto	Nogales	Rock Island	Fresno	Covington
Utah	100%
District of Columbia		100%
New Hampshire	1.24%	98.7%
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%
Mississippi		10.9%	74.0%	15.1%
West Virginia	48.2%	51.8%
Nebraska		88.6%	11.4%
Missouri		23.4%	62.5%	14.1%
Alabama		69.5%	16.4%	14.0%
Wisconsin	13.1%	53.1%	33.7%
South Carolina		99.9%
Connecticut		99.9%
Pennsylvania	6.15%	93.9%
Tennessee		41.3%	58.7%
Arkansas			87.2%	12.8%
South Dakota	22.1%	76.0%	1.85%
Iowa		50.0%	50.0%
Alaska	99.8%					0.671%
Rhode Island		99.3%				4.44%
Washington	99.9%					1.05%
Nova Scotia						3.14%
Virginia	10.3%	89.6%				0.818%
Delaware		99.2%				2.57%
Prince Edward Island						19.7%
Hawaii	92.1%					2.48%	13.2%		3.56%	1.64%
North Carolina		99.9%				1.08%
Oregon	100%					0.120%
New Brunswick						0.602%
British Columbia	2.52%					0.699%
Newfoundland and Labrador						1.91%
Massachusetts		99.5%				5.64%			0.220%
New York	61.6%	38.3%				3.00%
Maryland		99.3%				2.92%
Arizona	92.2%	7.76%
Florida		64.2%	35.5%					0.637%		0.865%	1.15%
Idaho	100%
Maine	40.0%	59.8%				0.825%
Saskatchewan												1
Texas	16.8%	43.9%	36.9%		2.38%								1
Louisiana		30.4%	69.5%
New Mexico	90.2%	9.71%
Kansas		68.1%	31.5%
New Jersey	19.5%	80.3%				1.77%								1
Michigan	34.8%	64.8%
Colorado	69.4%	30.6%
Nevada	100%
Georgia		61.5%	38.5%					0.250%
Manitoba
Oklahoma		3.41%	35.1%	46.0%	15.5%
California	99.9%					0.408%	0.184%
Ohio	3.97%	96.0%
Indiana		62.9%	37.1%
Minnesota	23.4%	72.5%	4.03%
Illinois		70.3%	29.6%

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