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 | Commercial gardening | Dairy | Grain | Intensive subsistence, wet rice not dominant | Little or no agriculture | Livestock Ranching | Mediterranean | Mixed crop and livestock | Plantation | Acadiana | Black Belt | Cuban South Florida | French-Canadian Quebec | Hispanic borderlands | Navajo Reservation | Nunavut | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alaska | 99.8% | 0.159% | |||||||||||||||||||
Yukon | 100% | ||||||||||||||||||||
Northwest Territories | 0.342% | ||||||||||||||||||||
Idaho | 100% | 4.10% | 31.1% | 53.6% | |||||||||||||||||
New Hampshire | 1.24% | 98.7% | 23.1% | 76.9% | |||||||||||||||||
Rhode Island | 99.3% | 3.94% | |||||||||||||||||||
Vermont | 77.1% | 22.6% | 0.385% | 99.6% | |||||||||||||||||
Washington | 99.9% | 11.0% | 0.217% | 6.88% | 24.7% | ||||||||||||||||
Wyoming | 87.7% | 12.3% | 10.2% | 23.1% | 18.3% | ||||||||||||||||
Montana | 100% | 25.6% | 30.7% | 5.29% | |||||||||||||||||
Maine | 40.0% | 59.8% | 0.284% | 20.2% | 37.6% | 12.1% | |||||||||||||||
North Dakota | 29.5% | 70.5% | 32.1% | 63.4% | 2.35% | 2.14% | |||||||||||||||
Kentucky | 4.42% | 60.5% | 35.1% | 100% | |||||||||||||||||
Nova Scotia | 0.183% | 49.4% | |||||||||||||||||||
Delaware | 99.2% | 99.1% | |||||||||||||||||||
Prince Edward Island | 98.4% | ||||||||||||||||||||
Saskatchewan | 1.89% | 11.9% | 81.2% | 5.04% | |||||||||||||||||
West Virginia | 48.2% | 51.8% | 13.1% | 86.9% | |||||||||||||||||
Nebraska | 88.6% | 11.4% | 33.9% | 2.53% | 63.6% | ||||||||||||||||
Missouri | 23.4% | 62.5% | 14.1% | 96.0% | 4.01% | ||||||||||||||||
Hawaii | 92.1% | 1.65% | 58.6% | ||||||||||||||||||
Oregon | 100% | 3.15% | 41.2% | 22.3% | 5.82% | ||||||||||||||||
New Brunswick | 0.147% | 0.167% | |||||||||||||||||||
Kansas | 68.1% | 31.5% | 44.9% | 0.337% | 54.8% | ||||||||||||||||
Wisconsin | 13.1% | 53.1% | 33.7% | 97.7% | 0.782% | 1.50% | |||||||||||||||
British Columbia | 2.52% | 1.22% | 2.96% | 0.192% | 1.58% | 0.252% | 17.2% | ||||||||||||||
Newfoundland and Labrador | 25.0% | ||||||||||||||||||||
New Jersey | 19.5% | 80.3% | 0.133% | ||||||||||||||||||
Michigan | 34.8% | 64.8% | 99.0% | 0.555% | 0.431% | ||||||||||||||||
Alberta | 13.2% | 76.8% | 0.686% | 7.41% | |||||||||||||||||
Connecticut | 99.9% | 99.9% | |||||||||||||||||||
Pennsylvania | 6.15% | 93.9% | 15.9% | 5.77% | 35.8% | ||||||||||||||||
Nevada | 100% | 5.36% | 0.608% | 0.185% | |||||||||||||||||
Massachusetts | 99.5% | 0.491% | 6.18% | 0.195% | |||||||||||||||||
New York | 61.6% | 38.3% | 2.89% | 55.9% | 15.1% | ||||||||||||||||
Manitoba | 2.12% | 97.9% | |||||||||||||||||||
Oklahoma | 3.41% | 35.1% | 46.0% | 15.5% | 4.69% | 21.6% | 73.7% | ||||||||||||||
Ontario | 2.23% | 0.558% | 0.386% | 93.7% | |||||||||||||||||
South Dakota | 22.1% | 76.0% | 1.85% | 0.441% | 8.22% | 19.4% | 71.9% | ||||||||||||||
Ohio | 3.97% | 96.0% | 40.0% | 60.0% | |||||||||||||||||
Indiana | 62.9% | 37.1% | 4.74% | 95.3% | |||||||||||||||||
Minnesota | 23.4% | 72.5% | 4.03% | 56.7% | 29.9% | 13.4% | |||||||||||||||
Iowa | 50.0% | 50.0% | 5.06% | 2.79% | 92.1% | ||||||||||||||||
Illinois | 70.3% | 29.6% | 5.45% | 18.4% | 76.2% | ||||||||||||||||
Arizona | 92.2% | 7.76% | 11.4% | 12.2% | 74.4% | 0.405% | 0.105% | 48.4% | 14.0% | ||||||||||||
Utah | 100% | 2.61% | 10.7% | 1.23% | |||||||||||||||||
District of Columbia | 100% | 100% | 100% | ||||||||||||||||||
Florida | 64.2% | 35.5% | 0.114% | 0.118% | 3.77% | ||||||||||||||||
Nunavut | 0.595% | 98.3% | |||||||||||||||||||
Virginia | 10.3% | 89.6% | 12.3% | 80.1% | 29.1% | ||||||||||||||||
Mississippi | 10.9% | 74.0% | 15.1% | 17.6% | 49.2% | 33.2% | 63.6% | ||||||||||||||
Texas | 16.8% | 43.9% | 36.9% | 2.38% | 3.30% | 2.73% | 33.1% | 56.8% | 0.184% | 56.1% | |||||||||||
Louisiana | 30.4% | 69.5% | 0.203% | 45.3% | 11.7% | 20.6% | 48.2% | ||||||||||||||
North Carolina | 99.9% | 0.120% | 69.0% | 54.7% | |||||||||||||||||
Alabama | 69.5% | 16.4% | 14.0% | 19.1% | 80.8% | 48.6% | |||||||||||||||
New Mexico | 90.2% | 9.71% | 0.302% | 5.01% | 0.786% | 4.18% | 89.9% | 3.98% | |||||||||||||
South Carolina | 99.9% | 32.9% | 67.0% | 70.7% | |||||||||||||||||
Colorado | 69.4% | 30.6% | 0.215% | 35.4% | 46.4% | 17.0% | |||||||||||||||
Georgia | 61.5% | 38.5% | 4.17% | 60.4% | 62.2% | ||||||||||||||||
Maryland | 99.3% | 0.157% | 24.7% | 16.4% | |||||||||||||||||
Québec | 2.81% | 1.06% | 0.475% | 99.6% | |||||||||||||||||
Tennessee | 41.3% | 58.7% | 99.9% | 2.75% | |||||||||||||||||
California | 99.9% | 4.11% | 9.14% | 51.8% | 34.7% | 49.1% | |||||||||||||||
Arkansas | 87.2% | 12.8% | 0.748% | 33.1% | 66.2% | 20.3% | |||||||||||||||
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