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 | No data | Arid and low water use | Low (<10%) | Low-medium (10-20%) | Medium-high (20-40%) | High (40-80%) | Extremely high (>80%) | Chromium Mines | Sea-Level Rise Vulnerability (2 m) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Arizona | 92.2% | 7.76% | 3.34% | 9.37% | 6.97% | 0.448% | 4.52% | |||||||
Utah | 100% | 20.8% | 13.7% | 0.313% | 0.420% | 49.5% | ||||||||
Yukon | 0.923% | 99.0% | ||||||||||||
Idaho | 100% | 0.772% | 13.8% | 28.4% | 8.83% | 44.9% | ||||||||
New Hampshire | 1.24% | 98.7% | 17.2% | 33.7% | 40.5% | 8.46% | ||||||||
Vermont | 77.1% | 22.6% | 7.27% | 88.3% | 4.41% | |||||||||
Washington | 99.9% | 72.6% | 3.37% | 5.42% | 0.287% | 6.53% | ||||||||
Wyoming | 87.7% | 12.3% | 21.7% | 0.541% | 70.3% | |||||||||
North Dakota | 29.5% | 70.5% | 7.38% | 3.22% | 4.45% | 0.249% | 9.67% | 36.7% | ||||||
Kentucky | 4.42% | 60.5% | 35.1% | 76.6% | 17.7% | 5.68% | ||||||||
Prince Edward Island | 98.5% | |||||||||||||
Saskatchewan | 4.25% | 59.9% | 2.62% | 2.54% | 2.67% | 0.868% | ||||||||
Mississippi | 10.9% | 74.0% | 15.1% | 74.5% | 1.57% | 23.9% | ||||||||
Nebraska | 88.6% | 11.4% | 0.605% | 3.54% | 22.3% | 73.5% | ||||||||
Missouri | 23.4% | 62.5% | 14.1% | 45.5% | 14.9% | 0.131% | 5.37% | |||||||
New Brunswick | 99.5% | |||||||||||||
New Mexico | 90.2% | 9.71% | 30.3% | 0.128% | 7.32% | 21.7% | ||||||||
Kansas | 68.1% | 31.5% | 0.176% | 1.82% | 13.8% | 68.4% | ||||||||
Wisconsin | 13.1% | 53.1% | 33.7% | 5.67% | 25.0% | 40.8% | 9.68% | |||||||
British Columbia | 2.52% | 92.0% | 1.55% | 0.285% | ||||||||||
Newfoundland and Labrador | 74.5% | |||||||||||||
Michigan | 34.8% | 64.8% | 56.0% | 3.00% | 4.63% | 9.70% | ||||||||
Alberta | 3.52% | 56.8% | 0.267% | 4.01% | 3.67% | 11.4% | ||||||||
Connecticut | 99.9% | 0.460% | 29.6% | 24.9% | 23.8% | 1.35% | ||||||||
Colorado | 69.4% | 30.6% | 0.795% | 9.40% | 85.2% | |||||||||
Nevada | 100% | 8.21% | 0.731% | 1.40% | 0.413% | 2.80% | 24.0% | |||||||
Québec | 99.1% | 0.240% | ||||||||||||
Manitoba | 0.656% | 83.1% | 11.7% | 2.04% | 1.39% | |||||||||
Oklahoma | 3.41% | 35.1% | 46.0% | 15.5% | 11.4% | 5.60% | 4.28% | 17.9% | 30.0% | |||||
Tennessee | 41.3% | 58.7% | 90.1% | 5.50% | ||||||||||
Ontario | 97.2% | 1.67% | 1.13% | |||||||||||
Arkansas | 87.2% | 12.8% | 12.6% | 46.8% | 33.2% | 6.01% | ||||||||
South Dakota | 22.1% | 76.0% | 1.85% | 32.7% | 3.47% | 37.3% | 22.0% | |||||||
Minnesota | 23.4% | 72.5% | 4.03% | 21.0% | 3.81% | 13.1% | 23.4% | 22.0% | ||||||
Iowa | 50.0% | 50.0% | 26.6% | 12.5% | 44.0% | 16.3% | 0.628% | |||||||
Illinois | 70.3% | 29.6% | 30.9% | 0.187% | 44.1% | 9.75% | ||||||||
Montana | 100% | 28.7% | 2.60% | 14.6% | 5.24% | 35.2% | 3 | |||||||
West Virginia | 48.2% | 51.8% | 63.6% | 17.6% | 14.6% | 1 | ||||||||
Pennsylvania | 6.15% | 93.9% | 1.42% | 27.8% | 49.9% | 3.96% | 1 | |||||||
Ohio | 3.97% | 96.0% | 3.42% | 0.721% | 29.0% | 1 | ||||||||
Indiana | 62.9% | 37.1% | 0.434% | 1.19% | 8.61% | 4.78% | 1 | |||||||
Alaska | 99.8% | 0.132% | 87.9% | 0.193% | 0.154% | 1.32% | 1 | 0.253% | ||||||
Northwest Territories | 0.342% | 3.62% | 0.135% | |||||||||||
District of Columbia | 100% | 100% | 7.08% | |||||||||||
Florida | 64.2% | 35.5% | 10.4% | 12.0% | 0.279% | 0.266% | 0.590% | 1.05% | ||||||
Rhode Island | 99.3% | 0.183% | 86.5% | 6.09% | 2.37% | |||||||||
Nunavut | 0.979% | 18.2% | 0.130% | |||||||||||
Maine | 40.0% | 59.8% | 94.9% | 2.65% | 0.228% | 0.817% | 0.141% | |||||||
Nova Scotia | 0.182% | 80.1% | 0.109% | |||||||||||
Virginia | 10.3% | 89.6% | 11.9% | 0.775% | 16.4% | 1.64% | 0.110% | |||||||
Delaware | 99.2% | 0.105% | 37.7% | 61.1% | 4.34% | |||||||||
Texas | 16.8% | 43.9% | 36.9% | 2.38% | 4.07% | 3.41% | 2.84% | 1.94% | 22.5% | 2.71% | 1 | 0.135% | ||
Louisiana | 30.4% | 69.5% | 54.5% | 20.6% | 5.75% | 12.6% | ||||||||
Hawaii | 92.1% | 7.82% | 1.13% | |||||||||||
North Carolina | 99.9% | 0.116% | 12.2% | 54.7% | 3.14% | 0.982% | 0.192% | |||||||
Oregon | 100% | 14.3% | 48.2% | 11.8% | 4.82% | 0.772% | 0.847% | 143 | 0.125% | |||||
Alabama | 69.5% | 16.4% | 14.0% | 92.6% | 5.45% | 0.987% | 0.218% | |||||||
New Jersey | 19.5% | 80.3% | 0.162% | 3.07% | 94.0% | 1.76% | 0.136% | |||||||
South Carolina | 99.9% | 0.748% | 24.6% | 36.2% | 3.75% | |||||||||
Massachusetts | 99.5% | 0.206% | 0.166% | 33.6% | 8.30% | 30.7% | 0.226% | |||||||
Georgia | 61.5% | 38.5% | 8.71% | 47.0% | 37.9% | 0.512% | ||||||||
New York | 61.6% | 38.3% | 25.4% | 5.89% | 56.3% | 5.19% | 0.401% | 0.143% | ||||||
Maryland | 99.3% | 0.151% | 4.45% | 64.3% | 1.05% | 8.49% | 0.387% | |||||||
California | 99.9% | 0.688% | 12.5% | 0.232% | 17.8% | 2.26% | 1.00% | 283 | 0.575% | |||||
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