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{{short description|2020 wind event taking place across the Midwest region of the United States}} {{short description|2020 wind event taking place across the Midwest region of the United States}}
{{Current weather event|derecho|date=August 2020}} {{Current weather event|derecho|date=August 2020}}
{{Derechobox|Name=August 2020 Midwest derecho|date=August 10-11, 2020|wind=112|windloc=]{{Specify|need specific community, multiple with that name|date=August 2020}}|image=Derecho-Aug2020-Animated.webm|image name=Radar track from 3am to 7pm CDT|areas=] (SE), ], ] (NE), ], ], ], ] (N), ], ], ]|duration=20+ hours (ongoing)|damage=Widespread}} {{Derechobox|Name=August 2020 Midwest derecho|date=August 10-11, 2020|wind=112|windloc=]{{Specify|need specific community, multiple with that name|date=August 2020}}|image=Derecho-Aug2020-Animated.webm|image name=Radar track from 3am to 7pm CDT|areas=] (SE), ], ] (NE), ], ], ], ] (N), ], ], ]|duration=14 hours|damage=Widespread|track={{Convert|770|mi|km}}<ref name="WC"/>}}


The '''August 2020 Midwest ]''', a high-wind type of ], is a weather event which took place beginning on August 10, 2020 across the ]. Moderate to severe damage occurred across the affected area, with the greatest damage occurring in ] and northern ]. Wind speeds of {{convert|70|mph|kph|round=5|abbr=}} were prevalent across much of the affected area, with maximum recorded wind gusts over {{convert|110|mph|kph|round=5|abbr=}}. The impact subjected hundreds of thousands to ]. The '''August 2020 Midwest ]''', a high-wind type of ], is a weather event which took place beginning on August 10, 2020 across the ]. Moderate to severe damage occurred across the affected area, with the greatest damage occurring in ] and northern ]. Wind speeds of {{convert|70|mph|kph|round=5|abbr=}} were prevalent across much of the affected area, with maximum recorded wind gusts of {{convert|112|mph|kph|round=5|abbr=}}. The impact subjected millions to ] and hundreds of thousands to property damage.


== Storm Overview == == Storm Overview ==
Beginning in the early morning, the event storm system developed in southeastern ] and pushed its way east into ], followed by the southern ].<ref name=":0">{{Cite web|date=2020-08-10|title=Powerful derecho leaves path of devastation across Midwest|url=https://apnews.com/e7bfc5351814eb111f90f540d605514a|access-date=2020-08-11|website=AP NEWS}}</ref><ref name=":1">{{Cite web|date=2020-08-10|title=‘Derecho’ Storm Packing Hurricane Force Winds Rips Across Iowa Monday|url=https://who13.com/news/derecho-storm-packing-hurricane-force-winds-rips-across-iowa-monday/|access-date=2020-08-11|website=who13.com|language=en-US}}</ref><ref name="WC">{{Cite web|title=Derecho Tracked 700+ Miles Across the Midwest|url=https://weather.com/storms/severe/news/2020-08-10-derecho-forecast-midwest-severe-thunderstorms-chicago|access-date=2020-08-11|website=The Weather Channel|language=en-US}}</ref> At peak, the winds matched that of a ], as such, the storm has been frequently labeled an "inland hurricane".<ref name=":0" /> The peak of the derecho developed as the storm system pushed into central Iowa, losing strength after passing through Illinois.<ref name=":1" /><ref name=":2">{{Cite web|title=Destructive derecho, a line of storms with 100 mph winds, slams Chicago and Midwest|url=https://www.nbcnews.com/news/weather/destructive-derecho-line-storms-100-mph-winds-slams-chicago-midwest-n1236332|access-date=2020-08-11|website=NBC News|language=en}}</ref>
Beginning in the early morning, the event storm system developed in southeastern ] and pushed its way east into ], followed by the southern ].


=== Official NWS Storm Warnings === === Official NWS Storm Warnings ===
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|<ref>{{Cite web|title=Storm Prediction Center Severe Thunderstorm Watch 431|url=https://www.spc.noaa.gov/products/watch/ww0431.html|access-date=2020-08-11|website=www.spc.noaa.gov}}</ref> |<ref>{{Cite web|title=Storm Prediction Center Severe Thunderstorm Watch 431|url=https://www.spc.noaa.gov/products/watch/ww0431.html|access-date=2020-08-11|website=www.spc.noaa.gov}}</ref>
|} |}
=== Highest Recorded Winds<ref name=":3">{{Cite web|last=Cappucci|first=Matthew|last2=Freedman|first2=Andrew|last3=Samenow|first3=Jason|date=10 Aug 2020|title=Destructive derecho blasts Chicago with winds over 70 mph; more than 1 million lose power in Upper Midwest|url=https://www.washingtonpost.com/weather/2020/08/10/damaging-derecho-takes-aim-chicago-area-with-dangerous-winds-up-100-mph/|url-status=live|archive-url=|archive-date=|access-date=11 Aug 2020|website=The Washington Post}}</ref><ref name=":2" /> ===
=== Highest Recorded Winds ===
{| class="wikitable sortable mw-collapsible" {| class="wikitable sortable mw-collapsible"
!Recording Location !Recording Location
!Peak Wind Gust Speed !Peak Wind Gust Speed
!
|- |-
|] |]
|112 mph (180 km/h) |112 mph (180 km/h)
|
|- |-
|] |]
|106 mph (170 km/h) |106 mph (170 km/h)
|
|- |-
|] |]
|100 mph (160 km/h) |100 mph (160 km/h)
|
|- |-
|Marshalltown Municipal Airport |Marshalltown Municipal Airport
|99 mph (159 km/h) |99 mph (159 km/h)
|
|- |-
|] |]
|99 mph (159 km/h) |99 mph (159 km/h)
|
|- |-
|] |]
|95 mph (152 km/h) |95 mph (152 km/h)
|
|- |-
|] |]
|91 mph (146 km/h) |91 mph (146 km/h)
|
|- |-
|] |]
|90 mph (144 km/h) |90 mph (144 km/h)
|
|- |-
|] |]
|90 mph (144 km/h) |90 mph (144 km/h)
|
|- |-
|] |]
|86 mph (138 km/h) |86 mph (138 km/h)
|
|- |-
|] |]
|85 mph (136 km/h) |85 mph (136 km/h)
|
|- |-
|] |]
|78 mph (125 km/h) |78 mph (125 km/h)
|
|- |-
|] |]
|75 mph (120 km/h) |75 mph (120 km/h)
|
|- |-
|] |]
|72 mph (116 km/h) |72 mph (116 km/h)
|
|} |}
⚫ == Impact ==
The complex of storms has knocked out power and caused tree damage from around ], to central Iowa.<ref>{{Cite web|title=Midwest Derecho Has Raced Eastward Bringing Widespread Damaging Winds|url=https://weather.com/storms/severe/news/2020-08-10-derecho-forecast-midwest-severe-thunderstorms-chicago|access-date=2020-08-11|website=The Weather Channel|language=en-US}}</ref> More than 1 million people were without power in the wake of the storms from eastern Nebraska to northern Illinois as the storms raced eastward into southern ] and Indiana. A personal weather station in ] clocked a surface gust of {{convert|85|mph|kph|round=5|abbr=}}, while several locations clocked gusts exceeding {{convert|100|mph|kph|round=5|abbr=}}. The storm’s intensity marginally waned as it headed east, but ]’s ] clocked a gust to {{convert|73|mph|kph|round=5|abbr=}}.<ref>{{Cite web|last=Cappucci|first=Matthew|last2=CappucciMeteorologist|first2=closeMatthew|last3=GangEmailEmailBioBioFollowFollow|first3=Capital Weather|last4=Freedman|first4=rew|last5=close|last6=weather|first6=rew FreedmanEditor focusing on extreme|last7=Change|first7=Climate|last8=science|last9=SamenowEditor|first9=the environment EmailEmailBioBioFollowFollowJason SamenowcloseJason|title=Destructive derecho blasts Chicago with winds over 70 mph; more than 1 million lose power in Upper Midwest|url=https://www.washingtonpost.com/weather/2020/08/10/damaging-derecho-takes-aim-chicago-area-with-dangerous-winds-up-100-mph/|access-date=2020-08-10|website=Washington Post|language=en}}</ref> Chicago experienced its most severe winds around 20:00 UTC when, in addition to the 73 mph gust at Midway, ] saw a {{convert|62|mph|kph|round=5|abbr=|adj=on}} gust. The ] tweeted that “much of northern Illinois has pockets of damage with downed trees, debris, and power lines blocking roadways” after the worst had passed.


⚫ == Impact ==
The ] for the Chicago and areas east to the Indiana State Line, issued at 18:54 UTC by the Weather Service, affected 7.8 million people. Several tornado warnings were issued in northern Illinois from near ], Illinois, to Chicago’s north and west suburbs, including ], as the Weather Service observed areas of enhanced winds on the leading edge of the line. One tornado probably did touch down near ], about 60 miles southwest of Chicago. Winds gusted to 62 mph in ], Illinois, west of ], as the storms barreled through. Numerous reports of significant winds, and at times extreme winds, have been received from across the ]:
Wide-scale utility disruption and property damage occurred across the affected area. Overall, more than a million customers (residential and commercial) have been ] across the affected area.<ref name=":0" /><ref name=":4">{{Cite web|title=Midwest Derecho Causes Widespread Damage; More Than 1 Million Homes and Businesses Lose Power|url=https://weather.com/news/news/2020-08-10-midwest-derecho-impacts|access-date=2020-08-11|website=The Weather Channel|language=en-US}}</ref><ref name=":3" /> In Iowa, over 500,000 across the state had power outages, peaking at 132,000 in the ] according to local utility company ]. The company says it may take days of round-the-clock shifts before power is restored to many of them.<ref name=":5">{{Cite web|last=Eller|first=Philip Joens, Andrea May Sahouri and Donnelle|title=Derecho sends straight-line winds through Iowa, leaving hundreds of thousands without power|url=https://www.desmoinesregister.com/story/news/crime-and-courts/2020/08/10/iowa-weather-rare-derecho-leaves-damage-power-outages-across-state-national-weather-service/3337658001/|access-date=2020-08-11|website=Des Moines Register|language=en-US}}</ref><ref>{{Cite web|last=Gothner|first=Chris|date=2020-08-11|title=MidAmerican says it could be days until some Iowans get power|url=https://www.kcci.com/article/midamerican-says-it-could-be-days-until-some-iowans-get-power/33568608|access-date=2020-08-11|website=KCCI|language=en}}</ref><ref>{{Cite web|date=2020-08-10|title=UPDATE: Some MidAmerican Customers Could be Without Power for ‘Several’ Days|url=https://who13.com/news/some-midamerican-customers-could-be-without-power-for-two-days/|access-date=2020-08-11|website=who13.com|language=en-US}}</ref> Many Iowa towns and cities advised residents not to travel due to damage. Many city-wide and county-wide ] have been declared.<ref>{{Cite web|date=2020-08-10|title=Iowans left to clean destruction left by Monday storms|url=https://www.kcci.com/article/stay-weather-aware-thunderstorms-expected-in-central-iowa-tornadoes-possible/33562151|access-date=2020-08-11|website=KCCI|language=en}}</ref> In Omaha, Nebraska, over 50,000 were left without power.<ref name=":0" /><ref>{{Cite web|last=Lundgren|first=Harper|date=|title=OPPD: Power outages to be resolved by Tuesday morning for most, Wednesday for some|url=https://www.wowt.com/2020/08/10/thousands-without-power-as-straight-line-winds-blow-through-metro/|url-status=live|archive-url=|archive-date=|access-date=2020-08-11|website=www.wowt.com}}</ref>


=== Types of damage ===
In ], Iowa, an eyewitness on social media described “utter destruction.” The ] reported that ] and other roads were blocked due to overturned vehicles and storm damage between Cedar Rapids and ].
] caused wide-scale damage to ], particularly trees, snapping large limbs, ripping off branches, and even felling or uprooting whole trees, often damaging homes and vehicles.<ref name=":0" /><ref name=":1" /><ref name=":2" /><ref name=":5" /> Many farmers in Iowa found their crops flattened and destroyed by the storm and empty grain bins imploded. A local hockey arena had its roof torn off. Large vehicles and trailers were blown over or sent flying.<ref name=":4" /><ref name=":5" /> In ], hundreds of parked cars had their windows blown out.<ref name=":4" /> Some reports have shown loose wood debris being embedded into the side of buildings.<ref name=":4" />


== References == == References ==

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2020 wind event taking place across the Midwest region of the United States
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August 2020 Midwest derecho
Radar track from 3am to 7pm CDT
Date(s)August 10-11, 2020
Duration14 hours
Track length770 miles ()
Peak wind gust  (measured)112 mph (180 km/h; 50.1 m/s) (Midway, Iowa)
Damage costsWidespread
Areas affectedSouth Dakota (SE), Iowa, Nebraska (NE), Wisconsin, Missouri, Illinois, Indiana (N), Michigan, Kentucky, Ohio

The August 2020 Midwest derecho, a high-wind type of storm, is a weather event which took place beginning on August 10, 2020 across the Midwestern United States. Moderate to severe damage occurred across the affected area, with the greatest damage occurring in Iowa and northern Illinois. Wind speeds of 70 miles per hour (115 km/h) were prevalent across much of the affected area, with maximum recorded wind gusts of 112 miles per hour (180 km/h). The impact subjected millions to utility disruptions and hundreds of thousands to property damage.

Storm Overview

Beginning in the early morning, the event storm system developed in southeastern South Dakota and pushed its way east into Iowa, followed by the southern Great Lakes region. At peak, the winds matched that of a major hurricane, as such, the storm has been frequently labeled an "inland hurricane". The peak of the derecho developed as the storm system pushed into central Iowa, losing strength after passing through Illinois.

Official NWS Storm Warnings

Starting in the early morning of August 10, the National Weather Service tracked and published a series of warning bulletins for the event storm system. This tracking continued as the storm did throughout the day and into August 11.

National Weather Service (Storm Prediction Center) Warning Bulletins
Bulletin # Issued (CDT) Type Covered Areas Storm Location Storm Heading Warning Details
424 6:05am (until 11:00am) STW South Dakota (SE), Nebraska (NE), Iowa (NW) South Dakota-Nebraska border area East (into eastern Iowa) High Winds (75mph+) and Hail
425 8:55am (until 2:00am) STW Iowa (most of state) Iowa-Nebraska-South Dakota border area East (into central Iowa) High Winds (80mph+) and Large Hail
426 11:25am (until 7pm) STW

(PDS)

Iowa (E), Illinois (N), Wisconsin (S) Iowa (central) East (toward Lake Michigan) Extreme Winds (100mph+) and Large Hail
427 1pm (until 7pm) STW Wisconsin (E), Michigan (Upper Peninsula) Iowa-Illinois border area East (spreading north toward Lake Michigan) High Winds (70mph+) and Large Hail
428 4:25pm (until 12am) STW Michigan (S), Indiana (N) Illinois (N) East (toward Indiana) High Winds (70mph+) and Large Hail
429 2:55pm (until 10pm) STW Illinois, Missouri (E) Iowa-Illinois border area, East Illinois East (spreading south toward southern Illinois) High Winds (80mph+) and Large Hail
430 6:30pm (until 12am) STW Illinois (S), Indiana (S), Kentucky (NW) Illinois (central), Indiana (central), Missouri (E) Southeast (spreading toward Kentucky) High Winds (70mph+) and Significant Hail
431 7:05pm (until 12am) STW Ohio (E) Indiana, Michigan, Illinois (S) East (Ohio) High Winds (70mph+) and Significant Hail

Highest Recorded Winds

Recording Location Peak Wind Gust Speed
Midway, Iowa 112 mph (180 km/h)
La Grand, Iowa 106 mph (170 km/h)
Hiawatha, Iowa 100 mph (160 km/h)
Marshalltown Municipal Airport 99 mph (159 km/h)
Albion, Iowa 99 mph (159 km/h)
Marshalltown, Iowa 95 mph (152 km/h)
Marshalltown, Iowa 91 mph (146 km/h)
Atkins, Iowa 90 mph (144 km/h)
Blairstown, Iowa 90 mph (144 km/h)
Davenport, Iowa 86 mph (138 km/h)
Moline, Illinois 85 mph (136 km/h)
Ankeny Airport 78 mph (125 km/h)
Des Moines International Airport 75 mph (120 km/h)
Midway International Airport 72 mph (116 km/h)

Impact

Wide-scale utility disruption and property damage occurred across the affected area. Overall, more than a million customers (residential and commercial) have been left without power across the affected area. In Iowa, over 500,000 across the state had power outages, peaking at 132,000 in the Des Moines metropolitan area according to local utility company Mid-American Energy. The company says it may take days of round-the-clock shifts before power is restored to many of them. Many Iowa towns and cities advised residents not to travel due to damage. Many city-wide and county-wide states of emergency have been declared. In Omaha, Nebraska, over 50,000 were left without power.

Types of damage

Damage by the storm's winds caused wide-scale damage to plants, particularly trees, snapping large limbs, ripping off branches, and even felling or uprooting whole trees, often damaging homes and vehicles. Many farmers in Iowa found their crops flattened and destroyed by the storm and empty grain bins imploded. A local hockey arena had its roof torn off. Large vehicles and trailers were blown over or sent flying. In Marshalltown, Iowa, hundreds of parked cars had their windows blown out. Some reports have shown loose wood debris being embedded into the side of buildings.

References

  1. ^ "Derecho Tracked 700+ Miles Across the Midwest". The Weather Channel. Retrieved 2020-08-11.
  2. ^ "Powerful derecho leaves path of devastation across Midwest". AP NEWS. 2020-08-10. Retrieved 2020-08-11.
  3. ^ "'Derecho' Storm Packing Hurricane Force Winds Rips Across Iowa Monday". who13.com. 2020-08-10. Retrieved 2020-08-11.
  4. ^ "Destructive derecho, a line of storms with 100 mph winds, slams Chicago and Midwest". NBC News. Retrieved 2020-08-11.
  5. "Storm Prediction Center Severe Thunderstorm Watch 424". www.spc.noaa.gov. Retrieved 2020-08-11.
  6. "Storm Prediction Center Severe Thunderstorm Watch 425". www.spc.noaa.gov. Retrieved 2020-08-11.
  7. "Storm Prediction Center PDS Severe Thunderstorm Watch 426". www.spc.noaa.gov. Retrieved 2020-08-10.
  8. "Storm Prediction Center Severe Thunderstorm Watch 427". www.spc.noaa.gov. Retrieved 2020-08-11.
  9. "Storm Prediction Center Severe Thunderstorm Watch 428". www.spc.noaa.gov. Retrieved 2020-08-11.
  10. "Storm Prediction Center Severe Thunderstorm Watch 429". www.spc.noaa.gov. Retrieved 2020-08-11.
  11. "Storm Prediction Center Severe Thunderstorm Watch 430". www.spc.noaa.gov. Retrieved 2020-08-11.
  12. "Storm Prediction Center Severe Thunderstorm Watch 431". www.spc.noaa.gov. Retrieved 2020-08-11.
  13. ^ Cappucci, Matthew; Freedman, Andrew; Samenow, Jason (10 Aug 2020). "Destructive derecho blasts Chicago with winds over 70 mph; more than 1 million lose power in Upper Midwest". The Washington Post. Retrieved 11 Aug 2020.{{cite web}}: CS1 maint: url-status (link)
  14. ^ "Midwest Derecho Causes Widespread Damage; More Than 1 Million Homes and Businesses Lose Power". The Weather Channel. Retrieved 2020-08-11.
  15. ^ Eller, Philip Joens, Andrea May Sahouri and Donnelle. "Derecho sends straight-line winds through Iowa, leaving hundreds of thousands without power". Des Moines Register. Retrieved 2020-08-11.{{cite web}}: CS1 maint: multiple names: authors list (link)
  16. Gothner, Chris (2020-08-11). "MidAmerican says it could be days until some Iowans get power". KCCI. Retrieved 2020-08-11.
  17. "UPDATE: Some MidAmerican Customers Could be Without Power for 'Several' Days". who13.com. 2020-08-10. Retrieved 2020-08-11.
  18. "Iowans left to clean destruction left by Monday storms". KCCI. 2020-08-10. Retrieved 2020-08-11.
  19. Lundgren, Harper. "OPPD: Power outages to be resolved by Tuesday morning for most, Wednesday for some". www.wowt.com. Retrieved 2020-08-11.{{cite web}}: CS1 maint: url-status (link)
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