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Tornado Statistics



  Tornado Facts Courtesy of iii.org

Tornadoes

A tornado is a violently rotating air column that extends from thunderstorms and comes in contact with the ground, according to the National Oceanic and Atmospheric Administration (NOAA). In an average year, about 1,000 tornadoes are reported nationwide, according to NOAA. Tornado intensity is measured with the improved Fujita (EF) scale. The scale ranks tornadoes on a scale from 0 to 5, based on the amount and type of wind damage. It contains 28 different damage indicators based on damage to a variety of structures ranging from trees to shopping malls.

The United States is experiencing more tornadoes than any other country in the world, according to a 201

3 report by Lloyd & # 39 ;s of London. (See Summary, page 4 of Tornadoes a Rising Risk? For further results and statistics.)

Fujita Scale For Tornadoes

Original F-scale (1) Enhanced F-scale (2)
Category Damage Wind speed (mph) 3 second wind path (mph)
F-0 Light 40-72 65-85
F-1 [19659013] Moderate 73-112 86-110
F-2 Significant 113-157 111-135
F-3 Severe [19659013] 158 -207 136-165
F-4 Devastating 208-260 166-200
F-5 Incredible 261-318 [19659013] Over 200

(1) Original scale: wind speeds represent the fastest estimated speeds over a quarter of a mile.
(2) Improved scale: wind speeds represent a maximum of 3 second gusts.

Source: US Department of Commerce, National Maritime and Atmospheric Administration.

Tornados accounted for 40 percent of inflation-adjusted insured disaster losses from 1997 to 2016, according to Property Claim Services (PCS®), a Verisk Analytics® business. In 2018, the insured losses from US tornadoes and thunderstorms amounted to $ 14.1 billion, a decrease from $ 18 billion in 2017, according to Munich Re. The number of tornadoes fell to 1,124 in 2018 from 1,429 in 2017, according to the National Oceanic and Atmospheric Administration (NOAA). The total in 2017 was the highest since 2011, when there were 1691 tornadoes, including two spring events that resulted in more than $ 14 billion in losses when they occurred. There were 10 direct deaths from tornadoes in 2018, compared to 35 in 2017, according to NOAA. May was the peak month for tornadoes in 2018, with 155 turners. The United States experiences more tornadoes than any other country, according to a report by Lloyd & # 39 ;s from London from 2013.

Preliminary NOAA reports show that there were 1,429 tornadoes in 2019 to early November compared to 1,060 for the same period 2018. Tornados killed 38 people from January to November 2019, compared to nine people during the same period 2018.

On March 3, 2019, a tornado struck southeast of Alabama as part of a powerful storm system that resulted in catastrophic damage in Alabama, Georgia , South Carolina and Florida. At least 23 people were killed in a tornado on March 3 in Lee County, Alabama. In Beauregard, Alabama, the tornado left a half-mile-wide destruction. The National Weather Service said the tornado was an F4 force with peak winds of 170 miles per hour. The March 3 tornado was the deadliest outbreak in the United States since a system in Arkansas and Mississippi in April 2014 killed 35 people.

There were 303 tornadoes in April that caused seven deaths: two each in Texas, Louisiana and Oklahoma and one in Mississippi. 556 tornadoes were recorded in May. These tornadoes killed seven more, including three in Missouri, two in Oklahoma and one in Iowa and Ohio. Tornadoes from May 26 to May 29 in 13 states caused $ 2.8 billion in losses, according to the ISO unit for real estate claims services. On October 20 and 21, heavy thunderstorms swept through Texas, Oklahoma, Missouri, Arkansas, Tennessee and Louisiana, producing several tornadoes including an EF-3 that affected the Dallas, Texas area. Aon said insured losses could reach hundreds of millions of dollars.

Insured losses

The United States experiences more tornadoes than any other country. Tornados accounted for 39.9 percent of the insured disaster losses from 1997 to 2016, according to Verisk & # 39 ;s Property Claim Services (PCS). A report by Willis Re in March 2017 found that the average annual loss from severe convective storms is $ 11.23 billion ($ 2016) compared to $ 11.28 billion from hurricanes, based on PCS data. In 2018, insured losses from US tornadoes / thunderstorms amounted to 14.1 billion dollars, up from 18.2 billion dollars in 2017, according to Munich RE. The National Oceanic and Atmospheric Administration notes that tornadoes can occur at any time of the year. The most expensive US disaster with tornadoes, based on insured losses, occurred in April 2011. It affected Tuscaloosa, Alabama and other areas and cost $ 8.2 billion in insured damages ($ 2018). The second most expensive disaster with tornadoes, based on insured losses, hit Joplin, Missouri and other places in May 2011. The disaster cost $ 7.8 billion in insured losses in 2018 dollars. (See chart below.) The National Weather Service publishes updated tornado information.

View Archived Charts

(1) Excludes Puerto Rico. A tornado that crosses state lines counts as a single event in this chart.

Source: U.S. Pat. Department of Commerce, Storm Prediction Center, National Weather Service.

View Archived Charts


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