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August 2020 Midwest derecho

August 2020 Midwest Derecho
Farm field growing corn is shown, nearly all in sight has been flattened to the ground or broken. Behind the flattened field, a sunset glows.
Flattened corn field near Adel, Iowa on evening of August 10, 2020.
August 10 radar composite from 8am to 7pm CDT
Date(s)August 10, 2020 (August 10, 2020)
Duration14 hours[1]
Track length770 mi (1,240 km)[1]
Peak wind gust  (measured)126 mph (203 km/h; 56.3 m/s) (Atkins, Iowa, United States)[2]
Peak wind gust (est.)140 mph (225 km/h; 62.6 m/s) (Cedar Rapids, Iowa)[2]
Largest hail2 in (5.1 cm) (Freeport, Illinois)[2]
Tornado count26
Strongest tornado1 EF1 tornado
Fatalities4
Damage costs$11.2 billion (2020 USD)[I][4][5]
Types of damage Widespread damage to residential and commercial property, agriculture, and public utility infrastructure, some severe, affecting millions.[2][6][7][1]
Areas affectedMidwestern United States
State Breakdown
[1][8]
Severest impact Cedar Rapids, Iowa area[9][10][11]
1Most severe tornado damage; see Enhanced Fujita scale

The August 2020 Midwest derecho was a powerful derecho affecting the Midwestern United States on August 10–11, 2020, primarily eastern Nebraska, Iowa, Illinois, Wisconsin, and Indiana. It caused high winds and spawned an outbreak of weak tornadoes. Some areas reported torrential rain and large hail.[2][7][1]

Damage was moderate to severe across much of the affected area, as sustained wind speeds of 70 miles per hour (110 kilometers per hour; 31 meters per second) were prevalent. The greatest damage occurred in eastern Iowa, and northern Illinois, where multiple tornadoes touched down. The highest winds occurred in Iowa, measured at 126 mph (203 km/h; 56.3 m/s)[II] and highest estimated from post-event damage surveys at 140 mph (225 km/h; 62.6 m/s).[III][2][7]

Millions across the Midwest were affected by wide-scale utility disruptions,[12] residential and commercial property damage, and severe damage to corn and soybean crops.[1][7][2] Cedar Rapids, Iowa, was the most severely damaged,[11][13] suffering a near-complete blackout that lasted for weeks in some areas,[10][14] widespread and severe property damage,[15] and an estimated loss of at least half of the city's tree canopy.[16][17] The derecho caused over $11 billion (2020 USD) in damages[4] and spawned a years-long cleanup effort.[18]

  1. ^ a b c d e f "GOES-East Watches Derecho Slam Midwest - NOAA National Environmental Satellite, Data, and Information Service (NESDIS)". www.nesdis.noaa.gov. NOAA. August 11, 2020. Archived from the original on September 11, 2020. Retrieved August 27, 2020.
  2. ^ a b c d e f g Cite error: The named reference NWS-DVN was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference WPcost was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference NOAAbillion Jan2021 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference AONaug was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference NWS-DMX was invoked but never defined (see the help page).
  7. ^ a b c d "August 10, 2020: Derecho Brings Widespread Severe Wind Damage Along with Several Tornadoes". www.weather.gov. National Weather Service / NOAA. August 18, 2020. Archived from the original on August 15, 2020. Retrieved August 20, 2020.
  8. ^ Cite error: The named reference USDAwwcb was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference WPshambles was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference IASLworse was invoked but never defined (see the help page).
  11. ^ a b c d Bennett, Sukee (August 21, 2020). "Inside the derecho that pummeled the Midwest". PBS. Archived from the original on December 10, 2020. Retrieved December 9, 2020.
  12. ^ Cite error: The named reference :10 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference :19 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference :5 was invoked but never defined (see the help page).
  15. ^ "Cedar Rapids derecho damage worse than floods, National Guard activated". Radio Iowa. August 14, 2020. Archived from the original on August 20, 2020. Retrieved August 15, 2020.
  16. ^ Cite error: The named reference :36 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference :38 was invoked but never defined (see the help page).
  18. ^ "Storm Response Update - November 24 2020" (PDF). City of Cedar Rapids (PDF). November 24, 2020. Archived (PDF) from the original on November 27, 2020. Retrieved November 27, 2020.


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