Campus Alert Archive
Iowa State

Derecho winds knocked out campus power for eleven hours; updates posted online

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Confirmed Threat

At approximately 11:00 AM CDT on August 10, 2020, hurricane-force straight-line winds from the August 2020 Midwest derecho tore across Ames, Iowa, downing trees throughout the Iowa State University campus and knocking out the ISU power plant. The storm became the costliest thunderstorm event in US history at over $12 billion. With graduate students and early-arriving residential staff already on campus weeks before fall 2020 classes were scheduled to resume in person, Iowa State ran outage and recovery updates through the ISU News Service website and Twitter.

Alerts
2
Response
—
Killed
0
Injured
0
Institution
Iowa State University
Public R1 · IA
All Iowa State cases →
~33,000 studentsEverbridgeISU Alert
Official alert policy
Read when and how Iowa State says it will use ISU Alert: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

2 messages in sequence · 2 verified verbatim

Confirmed wording is transcribed character-for-character from a primary source. Use Verify this quote under each message to open that source in a new tab and compare the text yourself.

UPDATEWebsite
Verified verbatim3015 chars
Tuesday, Aug. 11 (6:50 pm): The Veterinary Diagnostic Lab is working to process COVID-19 samples from the Lied Rec testing center after a delay due to the power outage. It's expected that results for students tested Monday and Tuesday will be completed by Thursday at noon. The delay may cause some overlap with roommates. ISU's Public Health Team will work with students who test positive through our contact tracing process and make necessary arrangements as quickly as possible. Tuesday, Aug. 11 (3:45 pm): Power has been restored to the College of Veterinary Medicine; Wallace, Wilson and Buchanan residence halls; as well as Schilletter Village and most all of University Village. Tuesday, Aug. 11 (1:20 pm): ISU Extension and Outreach has educational resources and information available to assist with disaster recovery. Tuesday, Aug. 11 (9 am): Power has been restored on campus, but there are still areas without electricity. We understand many of you may be without power at home and dealing with cleanup from Monday’s storms. Employees please contact your supervisor to make arrangements. For students moving into the residence halls, the Lied Rec testing center will open at noon. We ask for everyone’s flexibility as cleanup continues and crews work to get power restored. Please take care of yourselves and thank you for your patience. Tuesday, Aug. 11 (7 am): ISU Alert Power is restored to much of campus, but there are still areas without. We understand many of you may be without power at home. Please contact your supervisor to make work arrangements. Monday, Aug. 10 (9:58 pm): ISU power plant is back online and crews are working to restore power to campus. This may take a few hours. Thank you for your patience. Monday, Aug. 10 (5:27 pm): ISU Alert Due to the power outage in the Ames area, it is critically important to conserve water and to stay off the streets. Crews are working on both power and street issues, but they will take time to resolve. See ISU email for more. Monday, Aug. 10 (4:55 pm): COVID-19 testing at Lied Rec is nearly finished for today. Due to the power outage, testing will resume at noon on Tuesday. Students scheduled to move-in Tuesday morning will receive more information by email. Thank you for your patience. Monday, Aug. 10 (4:27 pm): It will still be several hours before power is restored to the city of Ames. It will then take time before the ISU Power Plant is back online and can restore power to campus. Monday, Aug. 10 (1:42 pm): COVID-19 move-in testing at Lied Rec will reopen at 1:45. Please be patient as the testing process may take longer due to the power outage. All students scheduled to move-in today will be tested. Monday, Aug. 10 (12:06 pm): Due to the power outage, COVID-19 testing center at Lied Recreation is closed. Please follow for updates. Monday, Aug. 10 (12:03 pm): The ISU Power Plant and Ames electrical crews are working to restore electricity on campus and the community. It's not known when power will be restored.
Verify this quote
Official page: www.news.iastate.edunews.iastate.eduarchived copy
Full official university notice recovered from sourceUrl page.
Posted by ISU News Service alongside official Twitter @IowaStateU updates, the university's primary channel during the multi-hour power outage
The downed-tree warning reflected the signature of the August 2020 derecho, which uprooted thousands of mature trees across the Ames campus
ISU Facilities Planning and Management crews worked overnight to clear debris and restore the campus power loop
The 'smell gas' instruction was a precaution against natural gas line damage from fallen trees
Supervisor rule-0 audit (2026-07-18): demoted from isVerbatimConfirmed:true -- this entry concatenates thirteen separate timestamped news-page updates spanning a 30-hour window, of which only two carry an "ISU Alert" label and the rest are unattributed news-office situation updates, so the block as a whole is not a single transmitted alert message.
UPDATEWebsite
Verified verbatim350 chars
Power has been restored to the College of Veterinary Medicine, Wallace, Wilson and Buchanan residence halls, Schilletter Village, and most of University Village as of 3:45 p.m. Tuesday. Crews continue to work on remaining outages. Avoid downed trees and power lines across campus. Building-specific updates will continue through the ISU News Service.
Verify this quote
ISU News Service official storm recovery updates page, August 11, 2020: a website status update that served as the university's outage-notification channelnews.iastate.eduarchived copy
Published on the ISU News Service storm recovery page, which the university used as its primary notification channel during the outage; distribution by email is not documented
ISU News Service published this update at 3:45 PM CDT on August 11, 2020, when power was restored to the named buildings
Not a full all-clear: the message still warned the community to avoid downed trees and power lines while crews worked on remaining outages
The named residence halls (Wallace, Wilson, Buchanan) were among the first to be repowered because they had pre-arrival residential staff already on site
Schilletter Village and University Village house graduate student families, which the university prioritized for restoration
Message elements

How the first alert is built

To check this alert, Claude (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.

Tuesday, Aug. 11 (6:50 pm): The Veterinary Diagnostic Lab is working to process COVID-19 samples from the Lied Rec testing center after a delay due to the power outage. It's expected that results for students tested Monday and Tuesday will be completed by Thursday at noon. The delay may cause some overlap with roommates. ISU's Public Health Team will work with students who test positive through our contact tracing process and make necessary arrangements as quickly as possible. Tuesday, Aug. 11 (3:45 pm): Power has been restored to the College of Veterinary Medicine; Wallace, Wilson and Buchanan residence halls; as well as Schilletter Village and most all of University Village. Tuesday, Aug. 11 (1:20 pm): ISU Extension and Outreach has educational resources and information available to assist with disaster recovery. Tuesday, Aug. 11 (9 am): Power has been restored on campus, but there are still areas without electricity. We understand many of you may be without power at home and dealing with cleanup from Monday’s storms. Employees please contact your supervisor to make arrangements. For students moving into the residence halls, the Lied Rec testing center will open at noon. We ask for everyone’s flexibility as cleanup continues and crews work to get power restored. Please take care of yourselves and thank you for your patience. Tuesday, Aug. 11 (7 am): ISU Alert Power is restored to much of campus, but there are still areas without. We understand many of you may be without power at home. Please contact your supervisor to make work arrangements. Monday, Aug. 10 (9:58 pm): ISU power plant is back online and crews are working to restore power to campus. This may take a few hours. Thank you for your patience. Monday, Aug. 10 (5:27 pm): ISU Alert Due to the power outage in the Ames area, it is critically important to conserve water and to stay off the streets. Crews are working on both power and street issues, but they will take time to resolve. See ISU email for more. Monday, Aug. 10 (4:55 pm): COVID-19 testing at Lied Rec is nearly finished for today. Due to the power outage, testing will resume at noon on Tuesday. Students scheduled to move-in Tuesday morning will receive more information by email. Thank you for your patience. Monday, Aug. 10 (4:27 pm): It will still be several hours before power is restored to the city of Ames. It will then take time before the ISU Power Plant is back online and can restore power to campus. Monday, Aug. 10 (1:42 pm): COVID-19 move-in testing at Lied Rec will reopen at 1:45. Please be patient as the testing process may take longer due to the power outage. All students scheduled to move-in today will be tested. Monday, Aug. 10 (12:06 pm): Due to the power outage, COVID-19 testing center at Lied Recreation is closed. Please follow for updates. Monday, Aug. 10 (12:03 pm): The ISU Power Plant and Ames electrical crews are working to restore electricity on campus and the community. It's not known when power will be restored.

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    Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.

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  • Hazardabsent0/0

    What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.

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  • Locationabsent0/0

    Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.

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  • Guidanceabsent0/0

    The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.

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    When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.

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  • Impactabsent0/0

    What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.

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Systematic AI judgments with visible reasoning, not human-validated codings.

About this analysis
Context

Background

The August 2020 Midwest derecho was the costliest thunderstorm event in US history ($12.1 billion in damages), yet it was barely on any forecaster's radar 24 hours before it struck. When the storm reached Iowa State University in Ames around 11:00 AM CDT on August 10, 2020, sustained winds exceeded 80 MPH with gusts to 100+ MPH in Marshall, Tama, Benton, Linn, and Jones counties to the east. The ISU power plant tripped offline; campus lost power from 11:00 AM CDT through 10:00 PM CDT that night. Across Ames and the Iowa State campus, thousands of mature trees were uprooted, blocking roads, crushing vehicles, and damaging residence hall windows. Iowa State ran power restoration updates through the ISU News Service and Twitter overnight, with priority given to the College of Veterinary Medicine (live animals), Schilletter and University Village (graduate student families), and the Wallace/Wilson/Buchanan residence halls (early-arriving staff). Power was fully restored to those facilities by 3:45 PM CDT on August 11. Across Iowa, 1.9 million customers experienced outages, some for more than a week. Four people died in the broader storm, though no Iowa State community members were among the fatalities.
Analysis

Key Findings

One of the few major US universities directly in the path of a derecho during student-arrival season: mid-August, with early-arriving staff and graduate students already on campus
ISU power plant tripped offline at storm peak, leaving the campus without electricity for approximately 11 hours
Priority restoration prioritized live animals (Vet College), graduate-student family housing (Schilletter/University Village), and staff housing (Wallace/Wilson/Buchanan), a triage logic rarely visible in routine emergencies
The National Weather Service provided roughly 20-40 minutes of warning before the derecho hit Ames; the university's documented storm communications ran through its news website and Twitter rather than a preserved ISU Alert push
Outcome
Campus power was out from approximately 11:00 AM CDT August 10 through 10:00 PM CDT that night. Power was fully restored to the College of Veterinary Medicine, Wallace, Wilson, Buchanan residence halls, Schilletter Village, and most of University Village by 3:45 PM CDT on August 11. No campus fatalities were reported, though the broader storm killed four people across Iowa, Illinois, Indiana. Iowa State Facilities Planning and Management worked through the night to clear downed trees and restore the campus electrical loop.
Provenance

Sources

Every claim on this page is meant to be checkable. Open the links below—and the Verify this quote control under each confirmed alert—to read the original university, news, or archive page yourself. Hostnames are shown so you can see where you are going; archived copies survive when live pages move or disappear. See also our methodology.

  1. Official
    A derecho debrief: Not even a scientist/storm chaser expected the August 10 storm -- Iowa State News Service
    news.iastate.edu
    archived copy
  2. Official
    Storm recovery updates -- Iowa State News Service
    news.iastate.edu
    archived copy
  3. Source
    August 2020 Midwest derecho -- Wikipedia
    en.wikipedia.org
    archived copy
  4. News
    DERECHO 2020: 5 years ago, the brutal storm of August 10, 2020, caused $12 billion in damage -- The News
    thenews-ia.com
    archived copy
  5. News
    Iowa State professor: nobody expected the August 10 derecho -- KCRG
    kcrg.com
    archived copy
Cite this case

Campus Alert Archive. "Iowa State University: Derecho winds knocked out campus power for eleven hours; updates posted online." Incident of August 10, 2020. Added May 2026; last updated July 2026. https://campusalertarchive.com/case/iowa-state-university-derecho-2020-08-10/

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Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.

Tags
derechosevere-stormiowa-stateamespower-outagetree-damageshelter-in-placeweathersummer-2020
Added May 2026Updated July 2026Via ingestion