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Average Number of Tornado Incidences per Year (U.S.)

North AmericaPhysical Environment

Tornado prevalence in the United States per 1,000 square miles per year

Tornado Archive

A 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.

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Average Number of Tornado Incidences per Year (U.S.)

Water Resources Vulnerability

Opioid Deaths (U.S.)

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%)

Class

Rank

Deaths per 100,000 people

Yukon
0.923%99.0%
Northwest Territories
0.342%3.62%
Nunavut
0.979%18.2%
Nova Scotia
0.182%80.1%
Prince Edward Island
98.5%
Saskatchewan
4.25%59.9%2.62%2.54%2.67%0.868%
Nebraska
88.6%11.4%0.605%3.54%22.3%73.5%
Louisiana
30.4%69.5%54.5%20.6%5.75%
New Brunswick
99.5%
British Columbia
2.52%92.0%1.55%0.285%
Newfoundland and Labrador
74.5%
Alberta
3.52%56.8%0.267%4.01%3.67%11.4%
Pennsylvania
6.15%93.9%1.42%27.8%49.9%3.96%
Québec
99.1%0.240%
Manitoba
0.656%83.1%11.7%2.04%1.39%
Ontario
97.2%1.67%1.13%
Alabama
69.5%16.4%14.0%92.6%5.45%0.987%29249
Alaska
99.8%0.132%87.9%0.193%0.154%1.32%16338
Arizona
92.2%7.76%3.34%9.37%6.97%0.448%4.52%19304
Arkansas
87.2%12.8%12.6%46.8%33.2%6.01%42118
California
99.9%0.688%12.5%0.232%17.8%2.26%1.00%31237
Colorado
69.4%30.6%0.795%9.40%85.2%30242
Connecticut
99.9%0.460%29.6%24.9%23.8%1.35%7399
Delaware
99.2%0.105%37.7%61.1%3520
District of Columbia
100%100%1792
Florida
64.2%35.5%10.4%12.0%0.279%0.266%0.590%25271
Georgia
61.5%38.5%8.71%47.0%37.9%35190
Hawaii
92.1%7.82%4690.0
Idaho
100%0.772%13.8%28.4%8.83%44.9%41145
Illinois
70.3%29.6%30.9%0.187%44.1%9.75%24275
Indiana
62.9%37.1%0.434%1.19%8.61%4.78%20300
Iowa
50.0%50.0%26.6%12.5%44.0%16.3%0.628%4781.1
Kansas
68.1%31.5%0.176%1.82%13.8%68.4%36181
Kentucky
4.42%60.5%35.1%76.6%17.7%5.68%6435
Maine
40.0%59.8%94.9%2.65%0.228%0.817%5468
Maryland
99.3%0.151%4.45%64.3%1.05%8.49%9392
Massachusetts
99.5%0.206%0.166%33.6%8.30%30.7%14357
Michigan
34.8%64.8%56.0%3.00%4.63%9.70%27266
Minnesota
23.4%72.5%4.03%21.0%3.81%13.1%23.4%22.0%33202
Mississippi
10.9%74.0%15.1%74.5%1.57%23.9%37168
Missouri
23.4%62.5%14.1%45.5%14.9%0.131%5.37%22283
Montana
100%28.7%2.60%14.6%5.24%35.2%43113
Nevada
100%8.21%0.731%1.40%0.413%2.80%24.0%23281
New Hampshire
1.24%98.7%17.2%33.7%40.5%8.46%17328
New Jersey
19.5%80.3%0.162%3.07%94.0%1.76%21289
New Mexico
90.2%9.71%30.3%0.128%7.32%21.7%12370
New York
61.6%38.3%25.4%5.89%56.3%5.19%0.401%38162
North Carolina
99.9%0.116%12.2%54.7%3.14%0.982%34197
North Dakota
29.5%70.5%7.38%3.22%4.45%0.249%9.67%36.7%45110
Ohio
3.97%96.0%3.42%0.721%29.0%10391
Oklahoma
3.41%35.1%46.0%15.5%11.4%5.60%4.28%17.9%30.0%32217
Oregon
100%14.3%48.2%11.8%4.82%0.772%0.847%18321
Rhode Island
99.3%0.183%86.5%6.09%15348
South Carolina
99.9%0.748%24.6%36.2%11374
South Dakota
22.1%76.0%1.85%32.7%3.47%37.3%22.0%4843.8
Tennessee
41.3%58.7%90.1%5.50%4480
Texas
16.8%43.9%36.9%2.38%4.07%3.41%2.84%1.94%22.5%2.71%44113
Utah
100%20.8%13.7%0.313%0.420%49.5%40149
Vermont
77.1%22.6%7.27%88.3%4.41%8399
Virginia
10.3%89.6%11.9%0.775%16.4%1.64%26269
Washington
99.9%72.6%3.37%5.42%0.287%6.53%13362
West Virginia
48.2%51.8%63.6%17.6%14.6%2735
Wisconsin
13.1%53.1%33.7%5.67%25.0%40.8%9.68%28261
Wyoming
87.7%12.3%21.7%0.541%70.3%39157
0.16.0