Average Number of Tornado Incidences per Year (U.S.)
North AmericaPhysical EnvironmentTornado prevalence in the United States per 1,000 square miles per year
Tornado ArchiveA 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.
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 | Lead Mines | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
District of Columbia | 100% | |||||||||||
Vermont | 77.1% | 22.6% | ||||||||||
Wyoming | 87.7% | 12.3% | ||||||||||
North Dakota | 29.5% | 70.5% | ||||||||||
West Virginia | 48.2% | 51.8% | ||||||||||
Nebraska | 88.6% | 11.4% | ||||||||||
Kansas | 68.1% | 31.5% | ||||||||||
Wisconsin | 13.1% | 53.1% | 33.7% | |||||||||
Michigan | 34.8% | 64.8% | ||||||||||
Pennsylvania | 6.15% | 93.9% | ||||||||||
Oklahoma | 3.41% | 35.1% | 46.0% | 15.5% | ||||||||
Ohio | 3.97% | 96.0% | ||||||||||
Indiana | 62.9% | 37.1% | ||||||||||
Minnesota | 23.4% | 72.5% | 4.03% | |||||||||
Iowa | 50.0% | 50.0% | ||||||||||
Hawaii | 92.1% | 1.74% | 1.20% | 0.113% | 0.444% | 2.10% | ||||||
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% | |||||||||
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% | ||||||||
Alabama | 69.5% | 16.4% | 14.0% | 0.174% | ||||||||
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% | |||||||||
Maryland | 99.3% | 0.874% | 0.178% | |||||||||
Alaska | 99.8% | 0.318% | 5 | |||||||||
Arizona | 92.2% | 7.76% | 198 | |||||||||
Utah | 100% | 188 | ||||||||||
Yukon | 4 | |||||||||||
Northwest Territories | 1 | |||||||||||
Idaho | 100% | 102 | ||||||||||
Washington | 99.9% | 0.513% | 0.132% | 27 | ||||||||
Nunavut | 0.352% | 1 | ||||||||||
Montana | 100% | 96 | ||||||||||
Maine | 40.0% | 59.8% | 0.133% | 0.322% | 1 | |||||||
Kentucky | 4.42% | 60.5% | 35.1% | 6 | ||||||||
Nova Scotia | 0.847% | 0.591% | 4 | |||||||||
Virginia | 10.3% | 89.6% | 0.126% | 0.493% | 1 | |||||||
Texas | 16.8% | 43.9% | 36.9% | 2.38% | 0.183% | 0.123% | 2 | |||||
Missouri | 23.4% | 62.5% | 14.1% | 17 | ||||||||
North Carolina | 99.9% | 0.319% | 0.191% | 2 | ||||||||
Oregon | 100% | 21 | ||||||||||
New Brunswick | 0.522% | 0.488% | 5 | |||||||||
New Mexico | 90.2% | 9.71% | 49 | |||||||||
British Columbia | 2.52% | 0.126% | 0.160% | 6 | ||||||||
Newfoundland and Labrador | 0.392% | 1 | ||||||||||
Colorado | 69.4% | 30.6% | 356 | |||||||||
Nevada | 100% | 26 | ||||||||||
Massachusetts | 99.5% | 1.78% | 3.30% | 4 | ||||||||
New York | 61.6% | 38.3% | 0.105% | 0.102% | 2 | |||||||
Manitoba | 1 | |||||||||||
Tennessee | 41.3% | 58.7% | 2 | |||||||||
Ontario | 7 | |||||||||||
California | 99.9% | 0.110% | 0.156% | 45 | ||||||||
Arkansas | 87.2% | 12.8% | 2 | |||||||||
South Dakota | 22.1% | 76.0% | 1.85% | 2 | ||||||||
Illinois | 70.3% | 29.6% | 5 | |||||||||
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