Current Table

Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

        Estimated insured loss
Rank Date Event Location Dollars when
occurred		 In 2023 dollars (2)
1 Aug. 8-12, 2020 Includes Aug. 10 Midwest Derecho IA, IL, IN, KS, MI, MN, MO, NE, OH,
SD, WI, PA, DC, MD, VA, WV		 $9,200 $10,879
2 Apr. 22-28, 2011 Late April 2011 Super Tornado Outbreak AL, AR, GA, IL, KY, LA, MO, MS,
OH, OK, TN, TX, VA		 7,560 10,346
3 May 21-27, 2011 Joplin, MO Tornado AR, GA, IA, IL, IN, KS, KY, MI, MN,
MO, NC, NE, NY, OH, OK, PA, TN,
TX, VA, WI		 7,000 9,535
4 May 2-11, 2003 SCS Outbreak AL, AR, CO, GA, IA, IL, IN, KS, KY, MO,
MS, NC, NE, OH, OK, SC, SD, TN		 3,300 5,535
5 Mar. 1-3, 2023 SCS Outbreak AL, AR, GA, IN, KY, MS, OH, PA, TN, VA 4,900 4,997
6 Mar. 31-Apr. 1, 2023 Tornado Outbreak AL, AR, DE, GA, IL, IN, IO, KY, MI, NE,
OH, PA, TN, TX		 4,300 4,385
7 May 27-30, 2019 SCS Outbreak CO, TX, OK, KS, AR, MO, IA, IL, IN, OH, PA, WV, WY, NJ, NY 3,650 4,387
8 Jun. 21-26, 2023 SCS Outbreak TX, CO, Southeast 4,250 4,287
9 Apr. 10-15, 2016 San Antonio Hailstorm TX, LA, OK, AR, MS, KS, MO 3,200 4,117
10 Apr. 6-12, 2001 St. Louis Hailstorm AR, CO, IA, IL, IN, KS, MI, MN, MO, NE, OH, OK, PA, TX 2,200 3,828

(1) Defined by Aon as severe convective storms including insured thunderstorm events and may include tornado, hail, damaging straight-line winds (derechos) and flash flood impacts from events. Includes events that occurred through 2023. Subject to change as loss estimates are further developed. As of January 2024.
(2) Adjusted for inflation by Aon using the U.S. Consumer Price Index.

Source: Aon.

 

Archived Tables

Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

      Estimated insured loss (2)
Rank Date Location Dollars when
occurred		 In 2015
dollars (3)
1 Apr. 22-28, 2011 AL, AR, GA, IL, KY, LA, MO,
MS, OH, OK, TN, TX, VA		 $7,300 $7,757
2 May 20-27, 2011 AR, GA, IA, IL, IN, KS, KY,
MI, MN, MO, NC, NE, NY,
OH, OK, PA, TN, TX, VA, WI		 6,900 7,332
3 May 2-11, 2003 AL, AR, CO, GA, IA, IL, IN,
KS, KY, MO, MS, NC, NE,
OH, OK, SC, SD, TN		 3,205 4,056
4 Oct. 4-6, 2010 AZ 2,700 2,928
5 Apr. 6-12, 2001 AR, CO, IA, IL, IN, KS, KY,
MI, MN, MO, NE, OH, OK,
PA, TX, WI		 2,200 2,884
6 Mar. 2-3, 2012 AL, GA, IN, KY, OH, TN 2,500 2,608
7 Apr. 28-29, 2012 IL, IN, KY, MO, TX 2,500 2,608
8 May 12-16, 2010 IL, MD, OK, PA, TX 2,000 2,169
9 Apr. 27-May 3, 2002 AR, GA, IL, IN, KS, KY, MD,
MO, MS, NC, NY, OH, PA,
TN, TX, VA, WV		 1,675 2,162
10 Apr. 13-15, 2006 IA, IL, IN, WI 1,850 2,142

(1) Based on data through May 31, 2016.
(2) Property coverage only. In addition to losses due to tornadoes themselves, amounts may include losses due to hail, wind and flooding during the same event.
(3) Adjusted for inflation through 2015 by ISO using the GDP implicit price deflator.

Source: Property Claim Services (PCS®), a Verisk Analytics® business.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

      Estimated insured loss (2)
Rank Date Location Dollars when
occurred		 In 2016
dollars (3)
1 Apr. 22-28, 2011 AL, AR, GA, IL, KY, LA, MO,
MS, OH, OK, TN, TX, VA		 $7,300 $7,875
2 May 20-27, 2011 AR, GA, IA, IL, IN, KS, KY, MI,
MN, MO, NC, NE, NY, OH, OK,
PA, TN, TX, VA, WI		 6,900 7,443
3 May 2-11, 2003 AL, AR, CO, GA, IA, IL, IN, KS,
KY, MO, MS, NC, NE, OH, OK,
SC, SD, TN		 3,205 4,118
4 Oct. 4-6, 2010 AZ 2,700 2,973
5 Apr. 6-12, 2001 AR, CO, IA, IL, IN, KS, KY, MI,
MN, MO, NE, OH, OK, PA,
TX, WI		 2,200 2,927
6 Mar. 2-3, 2012 AL, GA, IN, KY, OH, TN 2,500 2,648
7 Apr. 28-29, 2012 IL, IN, KY, MO, TX 2,500 2,648
8 May 12-16, 2010 IL, MD, OK, PA, TX 2,000 2,202
9 Apr. 27-May 3, 2002 AR, GA, IL, IN, KS, KY, MD, MO,
MS, NC, NY, OH, PA, TN, TX,
VA, WV		 1,675 2,195
10 Apr. 13-15, 2006 IA, IL, IN, WI 1,850 2,175

(1) Based on data through May 30, 2017.
(2) Property coverage only. In addition to losses due to tornadoes themselves, amounts may include losses due to hail, wind and flooding during the same event.
(3) Adjusted for inflation through 2016 by ISO using the GDP implicit price deflator.

Source: The Property Claim Services® (PCS®) unit of ISO®, a Verisk Analytics® company.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

      Estimated insured loss (2)
Rank Date Location Dollars when occurred In 2017 dollars (3)
1 Apr. 22-28, 2011 AL, AR, GA, IL, KY, LA, MO, MS, OH, OK, TN, TX, VA $7,300 $7,880
2 May 20-27, 2011 AR, GA, IA, IL, IN, KS, KY, MI, MN, MO, NC, NE, NY, OH, OK, PA, TN, TX, VA, WI 6,900 7,591
3 May 2-11, 2003 AL, AR, CO, GA, IA, IL, IN, KS, KY, MO, MS, NC, NE, OH, OK, SC, SD, TN 3,205 4,191
4 Oct. 4-6, 2010 AZ 2,700 3,033
5 Apr 6-12, 2001 AR, CO, IA, IL, IN, KS, MI, MN, MO, NE, OH, OK, PA, TX 2,200 2,976
6 Mar 2-3, 2012 AL, GA, IN, KY, OH, TN 2,500 2,699
7 Apr 28-29, 2012 IL, IN, KY, MO, TX 2,500 2,699
8 May 8-11, 2017  CO, MO, NM, OK, TX  2,507 2,507
9 May 12-16, 2010 IL, MD, OK, PA, TX 2,000 2,246
10 Apr 3-5, 2011 GA, IA, IL, KS, KY, MO, NC, SC, TN, WI 2,000 2,200

(1) Based on data through June 6, 2018.
(2) Property coverage only. In addition to losses due to tornadoes themselves, amounts may include losses due to hail, wind and flooding during the same event.
(3) Adjusted for inflation through 2017 by the Insurance Information Institute using the GDP implicit price deflator.

Source: The Property Claim Services® (PCS®) unit of ISO®, a Verisk Analytics® company; U.S. Bureau of Economic Analysis.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

      Estimated insured loss (2)
Rank Date Location Dollars when
occurred		 In 2018
dollars (3)
1 Apr. 22-28, 2011 AL, AR, GA, IL, KY,
LA, MO, MS, OH, OK,
TN, TX, VA		 $7,300 $8,210
2 May 20-27, 2011 AR, GA, IA, IL, IN,
KS, KY, MI, MN, MO,
NC, NE, NY, OH, OK,
PA, TN, TX, VA, WI		 6,900 7,760
3 May 2-11, 2003 AL, AR, CO, GA, IA,
IL, IN, KS, KY, MO,
MS, NC, NE, OH, OK,
SC, SD, TN		 3,205 4,283
4 Oct. 4-6, 2010 AZ 2,700 3,100
5 Apr. 6-12, 2001 AR, CO, IA, IL, IN,
KS, MI, MN, MO, NE,
OH, OK, PA, TX		 2,200 2,563
6 Mar. 2-3, 2012 AL, GA, IN, KY, OH, TN 2,500 2,758
7 Apr. 28-29, 2012 IL, IN, KY, MO, TX 2,500 2,758
8 May 8-11, 2017 CO, MO, NM, OK, TX 2,507 3,041
9 May 12-16, 2010 IL, MD, OK, PA, TX 2,000 2,296
10 Apr. 3-5, 2011 GA, IA, IL, KS, KY,
MO, NC, SC, TN, WI		 2,000 2,249

(1) Based on data through August 8, 2019.
(2) Property coverage only. In addition to losses due to tornadoes themselves, amounts may include losses due to hail, wind and flooding during the same event.
(3) Adjusted for inflation through 2018 by the Insurance Information Institute using the GDP implicit price deflator.

Source: The Property Claim Services® (PCS®) unit of ISO®, a Verisk Analytics® company; Bureau of Labor Statistics.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

      Estimated insured loss (2)
Rank Date Location Dollars when occurred In 2018 dollars (3)
1 Apr. 22-28, 2011 AL, AR, GA, IL, KY, LA, MO, MS, OH, OK, TN,
TX, VA		 $7,300 $8,210
2 May 20-27, 2011 AR, GA, IA, IL, IN, KS, KY, MI, MN, MO, NC,
NE, NY, OH, OK, PA, TN, TX, VA, WI		 6,900 7,760
3 May 2-11, 2003 AL, AR, CO, GA, IA, IL, IN, KS, KY, MO, MS,
NC, NE, OH, OK, SC, SD, TN		 3,205 4,283
4 May 26-29, 2019 CO, IA, IL, IN, KS, MO, NE, NJ, NY, OH, OK,
PA, WY		 2,835 2,835
5 Oct. 4-6, 2010 AZ 2,700 3,100
6 May 8-11, 2017 CO, MO, NM, OK, TX 2,507 3,041
7 Mar. 2-3, 2012 AL, GA, IN, KY, OH, TN 2,500 2,758
8 Apr 28-29, 2012 IL, IN, KY, MO, TX 2,500 2,758
9 Apr. 6-12, 2001 AR, CO, IA, IL, IN, KS, MI, MN, MO, NE,
OH, OK, PA, TX		 2,200 2,563
10 Apr. 3-5, 2011 GA, IA, IL, KS, KY, MO, NC, SC, TN, WI 2,000 2,249

(1) Based on data through November 20, 2019.
(2) Property coverage only. In addition to losses due to tornadoes themselves, amounts may include losses due to hail, wind and flooding during the same event.
(3) Adjusted for inflation through 2018 by the Insurance Information Institute using the GDP implicit price deflator.

Source: The Property Claim Services® (PCS®) unit of ISO®, a Verisk Analytics® company; Bureau of Labor Statistics.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

        Estimated insured loss
Rank Date Event Location Dollars when occurred In 2020 dollars (2)
1 Apr. 22-28, 2011 Late April 2011 Super Tornado Outbreak AL, AR, GA, IL, KY, LA, MO, MS, OH, OK, TN, TX, VA $7,300 $8,490
2 Aug. 8-12, 2020 Includes Aug. 10 Midwest Derecho IA, IL, IN, KS, MI, MN, MO, NE, OH, SD, WI, PA, DC, MD, VA, WV 8,250 8,250
3 May 21-27, 2011 Joplin, MO Tornado AR, GA, IA, IL, IN, KS, KY, MI, MN, MO, NC, NE, NY, OH, OK, PA, TN, TX, VA, WI 6,900 7,990
4 May 2-5, 2003   AL, AR, CO, GA, IA, IL, IN, KS, KY, MO, MS, NC, NE, OH, OK, SC, SD, TN 3,205 4,570
5 May 27-30, 2019   CO, TX, OK, KS, AR, MO, IA, IL, IN, OH, PA, WV, WY, NJ, NY 3,650 3,730
6 Apr. 10-15, 2016 San Antonio Hailstorm TX, LA, OK, AR, MS, KS, MO 3,200 3,500
7 Apr. 6-12, 2001 St. Louis Hailstorm AR, CO, IA, IL, IN, KS, MI, MN, MO, NE, OH, OK, PA, TX 2,200 3,250
8 May 18-23, 2014   CO, DE, IA, IL, IN, MT, NY, OH, PA,
SC, VA		 2,950 3,240
9 Oct. 5-6, 2010 Phoenix Hailstorm AZ 2,700 3,230
10 Mar. 2-3, 2012   AL, GA, IN, KY, OH, TN 2,500 2,850

(1) Defined by Aon as severe convective storms including insured thunderstorm events and may include tornado, hail, damaging straight-line winds (derechos) and flash flood impacts from events. Includes events that occurred through 2020. Subject to change as loss estimates are further developed. As of February 23, 2021.
(2) Adjusted for inflation by Aon using the U.S. Consumer Price Index.

Source: Aon.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

        Estimated insured loss
Rank Date Event Location Dollars when occurred In 2021 dollars (2)
1 Aug. 8-12, 2020 Includes Aug. 10 Midwest Derecho IA, IL, IN, KS, MI, MN, MO, NE, OH, SD, WI, PA, DC, MD, VA, WV $9,200 $9,580
2 Apr. 22-28, 2011 Late April 2011 Super Tornado Outbreak AL, AR, GA, IL, KY, LA, MO, MS, OH, OK, TN, TX, VA 7,300 8,800
3 May 21-27, 2011 Joplin, MO Tornado AR, GA, IA, IL, IN, KS, KY, MI, MN, MO, NC, NE, NY, OH, OK, PA, TN, TX, VA, WI 6,900 8,270
4 May 2-5, 2003   AL, AR, CO, GA, IA, IL, IN, KS, KY, MO, MS, NC, NE, OH, OK, SC, SD, TN 3,205 4,730
5 Dec. 10-12, 2021   AR, IL, IN, KY, MI, MO, NY, OH, TN, TX 4,000 4,000
6 May 27-30, 2019   CO, TX, OK, KS, AR, MO, IA, IL, IN,
OH, PA, WV, WY, NJ, NY		 3,650 3,860
7 Apr. 10-15, 2016 San Antonio Hailstorm TX, LA, OK, AR, MS, KS, MO 3,200 3,620
8 Apr. 6-12, 2001 St. Louis Hailstorm AR, CO, IA, IL, IN, KS, MI, MN, MO, NE, OH, OK, PA, TX 2,200 3,370
9 May 18-23, 2014   CO, DE, IA, IL, IN, MT, NY, OH, PA,
SC, VA		 2,950 3,360
10 Oct. 5-6, 2010 Phoenix Hailstorm AZ 2,700 3,350

(1) Defined by Aon as severe convective storms including insured thunderstorm events and may include tornado, hail, damaging straight-line winds (derechos) and flash flood impacts from events. Includes events that occurred through 2020. Subject to change as loss estimates are further developed. As of February 1, 2022.
(2) Adjusted for inflation by Aon using the U.S. Consumer Price Index.

Source: Aon.

 
Top 10 Costliest U.S. Catastrophes Involving Tornadoes (1)
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($ millions)

        Estimated insured loss
Rank Date Event Location Dollars when occurred In 2022 dollars (2)
1 Aug. 8-12, 2020 Includes Aug. 10 Midwest Derecho IA, IL, IN, KS, MI, MN, MO, NE, OH, SD, WI,
PA, DC, MD, VA, WV		 $9,200 $10,544
2 Apr. 22-28, 2011 Late April 2011 Super Tornado Outbreak AL, AR, GA, IL, KY, LA, MO, MS, OH, OK, TN, TX, VA 7,300  9,682
3 May 21-27, 2011 Joplin, MO Tornado AR, GA, IA, IL, IN, KS, KY, MI, MN, MO, NC,
NE, NY, OH, OK, PA, TN, TX, VA, WI		 6,900  9,109
4 May 2-5, 2003 SCS Outbreak AL, AR, CO, GA, IA, IL, IN, KS, KY, MO, MS, NC, NE, OH, OK, SC, SD, TN 3,205  5,210
5 May 27-30, 2019 SCS Outbreak CO, TX, OK, KS, AR, MO, IA, IL, IN, OH, PA, WV, WY, NJ, NY 3,650  4,252
6 Apr. 10-15, 2016 San Antonio Hailstorm TX, LA, OK, AR, MS, KS, MO 3,200  3,990
7 Apr. 6-12, 2001 St. Louis Hailstorm AR, CO, IA, IL, IN, KS, MI, MN, MO, NE, OH, OK, PA, TX 2,200  3,710
8 May 18-23, 2014 SCS Outbreak CO, DE, IA, IL, IN, MT, NY, OH, PA, SC, VA 2,950  3,669
9 Oct. 5-6, 2010 Phoenix Hailstorm AZ 2,700  3,683
10 Dec. 10-12, 2021 U.S. December Tornado Outbreak AR, IL, IN, KY, MI, MO, NY, OH, TN, TX 3,300  3,531

(1) Defined by Aon as severe convective storms including insured thunderstorm events and may include tornado, hail, damaging straight-line winds (derechos) and flash flood impacts from events. Includes events that occurred through 2022. Subject to change as loss estimates are further developed. As of January 2023.
(2) Adjusted for inflation by Aon using the U.S. Consumer Price Index.

Source: Aon.