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 | Sea-Level Rise Vulnerability (1 m) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Arizona | 92.2% | 7.76% | ||||||||||
Utah | 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% | ||||||||||
Missouri | 23.4% | 62.5% | 14.1% | |||||||||
New Mexico | 90.2% | 9.71% | ||||||||||
Kansas | 68.1% | 31.5% | ||||||||||
Wisconsin | 13.1% | 53.1% | 33.7% | |||||||||
Michigan | 34.8% | 64.8% | ||||||||||
Pennsylvania | 6.15% | 93.9% | ||||||||||
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% | |||||||||
Ohio | 3.97% | 96.0% | ||||||||||
Indiana | 62.9% | 37.1% | ||||||||||
Minnesota | 23.4% | 72.5% | 4.03% | |||||||||
Iowa | 50.0% | 50.0% | ||||||||||
Illinois | 70.3% | 29.6% | ||||||||||
Newfoundland and Labrador | 0.392% | |||||||||||
Mississippi | 10.9% | 74.0% | 15.1% | 0.461% | ||||||||
Texas | 16.8% | 43.9% | 36.9% | 2.38% | 0.183% | 0.123% | ||||||
British Columbia | 2.52% | 0.126% | 0.160% | |||||||||
Alaska | 99.8% | 0.318% | 0.230% | |||||||||
Northwest Territories | 0.106% | |||||||||||
District of Columbia | 100% | 6.93% | ||||||||||
Florida | 64.2% | 35.5% | 0.596% | 1.33% | 0.876% | |||||||
New Hampshire | 1.24% | 98.7% | 1.37% | 0.244% | ||||||||
Rhode Island | 99.3% | 4.64% | 2.01% | 3.07% | ||||||||
Washington | 99.9% | 0.513% | 0.132% | 0.110% | ||||||||
Nunavut | 0.352% | 0.118% | ||||||||||
Maine | 40.0% | 59.8% | 0.133% | 0.322% | 0.127% | |||||||
Nova Scotia | 0.847% | 0.591% | 0.134% | |||||||||
Virginia | 10.3% | 89.6% | 0.126% | 0.493% | 0.108% | |||||||
Delaware | 99.2% | 0.762% | 33.7% | 5.31% | ||||||||
Prince Edward Island | 1.25% | 0.264% | 1.22% | 1.21% | ||||||||
Louisiana | 30.4% | 69.5% | 0.184% | 0.106% | 0.728% | |||||||
Hawaii | 92.1% | 1.74% | 1.20% | 0.113% | 0.444% | 2.10% | 1.26% | |||||
North Carolina | 99.9% | 0.319% | 0.191% | 0.189% | ||||||||
Oregon | 100% | 0.116% | ||||||||||
New Brunswick | 0.522% | 0.488% | 0.167% | |||||||||
Alabama | 69.5% | 16.4% | 14.0% | 0.174% | 0.215% | |||||||
New Jersey | 19.5% | 80.3% | 0.329% | 15.3% | 2.79% | |||||||
South Carolina | 99.9% | 6.81% | 3.55% | |||||||||
Connecticut | 99.9% | 0.797% | 0.331% | |||||||||
Massachusetts | 99.5% | 1.78% | 3.30% | 0.375% | ||||||||
Georgia | 61.5% | 38.5% | 2.72% | 0.545% | ||||||||
New York | 61.6% | 38.3% | 0.105% | 0.102% | 0.163% | |||||||
Maryland | 99.3% | 0.874% | 0.178% | 0.568% | ||||||||
California | 99.9% | 0.110% | 0.156% | 0.557% | ||||||||
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