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 | General Area of Sedimentary Formations Favorable to Oil | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
District of Columbia | 100% | |||||||||||
Idaho | 100% | |||||||||||
Vermont | 77.1% | 22.6% | ||||||||||
Oregon | 100% | |||||||||||
Wisconsin | 13.1% | 53.1% | 33.7% | |||||||||
Nevada | 100% | |||||||||||
Tennessee | 41.3% | 58.7% | ||||||||||
South Dakota | 22.1% | 76.0% | 1.85% | |||||||||
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% | |||||||||
Washington | 99.9% | 0.513% | 0.132% | |||||||||
Maine | 40.0% | 59.8% | 0.133% | 0.322% | ||||||||
Virginia | 10.3% | 89.6% | 0.126% | 0.493% | ||||||||
Delaware | 99.2% | 0.762% | 33.7% | |||||||||
North Carolina | 99.9% | 0.319% | 0.191% | |||||||||
New Jersey | 19.5% | 80.3% | 0.329% | 15.3% | ||||||||
South Carolina | 99.9% | 6.81% | ||||||||||
Connecticut | 99.9% | 0.797% | ||||||||||
Massachusetts | 99.5% | 1.78% | 3.30% | |||||||||
Georgia | 61.5% | 38.5% | 2.72% | |||||||||
Maryland | 99.3% | 0.874% | 0.178% | |||||||||
Alaska | 99.8% | 0.318% | 10.9% | |||||||||
Arizona | 92.2% | 7.76% | 1.24% | |||||||||
Utah | 100% | 1.31% | ||||||||||
Yukon | 6.60% | |||||||||||
Northwest Territories | 70.2% | |||||||||||
Wyoming | 87.7% | 12.3% | 5.90% | |||||||||
Nunavut | 0.352% | 41.1% | ||||||||||
Montana | 100% | 40.7% | ||||||||||
North Dakota | 29.5% | 70.5% | 26.1% | |||||||||
Kentucky | 4.42% | 60.5% | 35.1% | 69.8% | ||||||||
Nova Scotia | 0.847% | 0.591% | 99.8% | |||||||||
Prince Edward Island | 1.25% | 0.264% | 1.22% | 100% | ||||||||
Saskatchewan | 26.5% | |||||||||||
Mississippi | 10.9% | 74.0% | 15.1% | 0.461% | 54.2% | |||||||
West Virginia | 48.2% | 51.8% | 32.9% | |||||||||
Nebraska | 88.6% | 11.4% | 4.37% | |||||||||
Texas | 16.8% | 43.9% | 36.9% | 2.38% | 0.183% | 0.123% | 40.9% | |||||
Missouri | 23.4% | 62.5% | 14.1% | 4.62% | ||||||||
Louisiana | 30.4% | 69.5% | 0.184% | 0.106% | 99.9% | |||||||
New Brunswick | 0.522% | 0.488% | 26.8% | |||||||||
Alabama | 69.5% | 16.4% | 14.0% | 0.174% | 20.4% | |||||||
New Mexico | 90.2% | 9.71% | 14.0% | |||||||||
Kansas | 68.1% | 31.5% | 49.5% | |||||||||
British Columbia | 2.52% | 0.126% | 0.160% | 4.41% | ||||||||
Newfoundland and Labrador | 0.392% | 25.6% | ||||||||||
Michigan | 34.8% | 64.8% | 31.7% | |||||||||
Alberta | 61.3% | |||||||||||
Pennsylvania | 6.15% | 93.9% | 33.4% | |||||||||
Colorado | 69.4% | 30.6% | 15.2% | |||||||||
New York | 61.6% | 38.3% | 0.105% | 0.102% | 4.89% | |||||||
Manitoba | 2.80% | |||||||||||
Oklahoma | 3.41% | 35.1% | 46.0% | 15.5% | 67.6% | |||||||
California | 99.9% | 0.110% | 0.156% | 5.00% | ||||||||
Arkansas | 87.2% | 12.8% | 14.5% | |||||||||
Ohio | 3.97% | 96.0% | 13.5% | |||||||||
Indiana | 62.9% | 37.1% | 32.9% | |||||||||
Illinois | 70.3% | 29.6% | 23.0% | |||||||||
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