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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.)					Prevailing Agricultural Practices									Ecological Regions: Level 2 Labels
	Less than 1	1–5	6–10	11–15	More than 15	Commercial gardening	Dairy	Grain	Intensive subsistence, wet rice not dominant	Little or no agriculture	Livestock Ranching	Mediterranean	Mixed crop and livestock	Plantation	ALASKA BOREAL INTERIOR	ALASKA TUNDRA	ARCTIC CORDILLERA	ATLANTIC HIGHLANDS	BOREAL CORDILLERA	BOREAL PLAIN	BROOKS RANGE TUNDRA	CENTRAL USA PLAINS	COLD DESERTS	EVERGLADES	HUDSON PLAIN	MARINE WEST COAST FOREST	MEDITERRANEAN CALIFORNIA	MISSISSIPPI ALLUVIAL AND SOUTHEAST USA COASTAL PLAINS	MIXED WOOD PLAINS	MIXED WOOD SHIELD	NORTHERN ARCTIC	OZARK/OUACHITA-APPALACHIAN FORESTS	SOFTWOOD SHIELD	SOUTH CENTRAL SEMIARID PRAIRIES	SOUTHEASTERN USA PLAINS	SOUTHERN ARCTIC	TAIGA CORDILLERA	TAIGA PLAIN	TAIGA SHIELD	TEMPERATE PRAIRIES	TEXAS-LOUISIANA COASTAL PLAIN	UPPER GILA MOUNTAINS	WARM DESERTS	WEST-CENTRAL SEMIARID PRAIRIES	WESTERN CORDILLERA	WESTERN SIERRA MADRE PIEDMONT
District of Columbia		100%				100%
Idaho	100%					4.10%		31.1%			53.6%
New Hampshire	1.24%	98.7%				23.1%	76.9%
Vermont	77.1%	22.6%				0.385%	99.6%
Kentucky	4.42%	60.5%	35.1%										100%
Virginia	10.3%	89.6%				12.3%							80.1%
Missouri		23.4%	62.5%	14.1%									96.0%	4.01%
Louisiana		30.4%	69.5%			0.203%							45.3%	11.7%
Hawaii	92.1%									1.65%				58.6%
Kansas		68.1%	31.5%					44.9%			0.337%		54.8%
South Carolina		99.9%				32.9%							67.0%
Connecticut		99.9%				99.9%
Georgia		61.5%	38.5%			4.17%							60.4%
Maryland		99.3%				0.157%							24.7%
Manitoba							2.12%			97.9%
Oklahoma		3.41%	35.1%	46.0%	15.5%	4.69%		21.6%					73.7%
Tennessee		41.3%	58.7%										99.9%
Ohio	3.97%	96.0%					40.0%						60.0%
Alaska	99.8%									0.159%					2	8			15		1					6
Arizona	92.2%	7.76%				11.4%				12.2%	74.4%		0.405%	0.105%																												2	1			1
Utah	100%					2.61%					10.7%												1																						1
Yukon										100%																											1
Northwest Territories										0.342%																					3					1		1	1
Florida		64.2%	35.5%			0.114%				0.118%														1				1
Rhode Island		99.3%				3.94%																						1
Washington	99.9%					11.0%	0.217%	6.88%			24.7%												1																						2
Wyoming	87.7%	12.3%				10.2%		23.1%			18.3%												1																						1
Nunavut										0.595%							8														20					4
Montana	100%							25.6%			30.7%		5.29%																															1	3
Maine	40.0%	59.8%				0.284%	20.2%			37.6%			12.1%					1
North Dakota	29.5%	70.5%					32.1%	63.4%		2.35%	2.14%																													1
Nova Scotia										0.183%			49.4%					2
Delaware		99.2%				99.1%																						1
Prince Edward Island													98.4%																1
Saskatchewan							1.89%	11.9%		81.2%			5.04%																																1
Mississippi		10.9%	74.0%	15.1%		17.6%							49.2%	33.2%														1
West Virginia	48.2%	51.8%					13.1%						86.9%																			1
Nebraska		88.6%	11.4%					33.9%			2.53%		63.6%																															1
Texas	16.8%	43.9%	36.9%		2.38%	3.30%		2.73%			33.1%		56.8%	0.184%																				2	1						1
North Carolina		99.9%				0.120%							69.0%															1							1
Oregon	100%					3.15%	41.2%	22.3%			5.82%															1
New Brunswick										0.147%			0.167%																1
Alabama		69.5%	16.4%	14.0%		19.1%							80.8%																						1
New Mexico	90.2%	9.71%				0.302%		5.01%			0.786%		4.18%																													4
Wisconsin	13.1%	53.1%	33.7%				97.7%			0.782%			1.50%																1
British Columbia	2.52%					1.22%	2.96%	0.192%	1.58%	0.252%	17.2%								1				1			1																			1
Newfoundland and Labrador										25.0%																							1
New Jersey	19.5%	80.3%				0.133%																						1
Michigan	34.8%	64.8%					99.0%			0.555%			0.431%									1							1	1
Alberta								13.2%		76.8%	0.686%		7.41%							1																				1
Pennsylvania	6.15%	93.9%				15.9%	5.77%						35.8%					1
Colorado	69.4%	30.6%				0.215%		35.4%			46.4%																																		1
Nevada	100%					5.36%				0.608%	0.185%												1
Massachusetts		99.5%				0.491%	6.18%			0.195%																		1
New York	61.6%	38.3%				2.89%	55.9%	15.1%										2										1
Québec							2.81%		1.06%	0.475%							1													1	1		2			1			1
Ontario							2.23%	0.558%	0.386%	93.7%															1				1				1
California	99.9%						4.11%			9.14%	51.8%	34.7%														2	1																		1
Arkansas			87.2%	12.8%		0.748%							33.1%	66.2%																		1			1
South Dakota	22.1%	76.0%	1.85%				0.441%	8.22%			19.4%		71.9%																																1
Indiana		62.9%	37.1%				4.74%						95.3%									1
Minnesota	23.4%	72.5%	4.03%				56.7%			29.9%			13.4%																	1
Iowa		50.0%	50.0%				5.06%	2.79%					92.1%																											1
Illinois		70.3%	29.6%				5.45%	18.4%					76.2%																						1

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