{
  "id": "2020-08-10-iowa-state-university-derecho",
  "slug": "iowa-state-university-derecho-2020-08-10",
  "institution": {
    "name": "Iowa State University",
    "shortName": "Iowa State",
    "state": "IA",
    "type": "public-r1",
    "alertSystemName": "ISU Alert",
    "alertPlatform": "Everbridge",
    "enrollment": 33000
  },
  "incident": {
    "date": "2020-08-10",
    "endDate": "2020-08-11",
    "type": "severe-storm",
    "cleryCategory": "emergency-notification",
    "headline": "Derecho winds knocked out campus power for eleven hours; updates posted online",
    "headlinePublic": "Derecho winds knocked out campus power for eleven hours; updates posted online",
    "summary": "At approximately 11:00 AM CDT on August 10, 2020, [hurricane-force straight-line winds](https://www.news.iastate.edu/news/derecho-debrief-not-even-scientiststorm-chaser-expected-august-10-storm) from the [August 2020 Midwest derecho](https://en.wikipedia.org/wiki/August_2020_Midwest_derecho) tore across Ames, Iowa, downing trees throughout the [Iowa State University](https://en.wikipedia.org/wiki/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](https://www.thenews-ia.com/stories/derecho-2020-5-years-ago-the-summer-storm-of-august-10-2020-destroyed-parts-of-iowas-tree,152977). 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](https://www.news.iastate.edu/news/2020/08/11/wxupdates).",
    "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.",
    "resolution": "confirmed-threat",
    "casualties": {
      "killed": 0,
      "injured": 0
    }
  },
  "alerts": [
    {
      "sequence": 1,
      "type": "update",
      "timestampApprox": "Monday afternoon, August 10, 2020",
      "channel": "website",
      "verbatimText": "",
      "isVerbatimConfirmed": false,
      "sourceUrl": "https://www.news.iastate.edu/news/2020/08/11/wxupdates",
      "sourceDescription": "Official page: www.news.iastate.edu",
      "annotations": []
    },
    {
      "sequence": 2,
      "type": "update",
      "timestamp": "2020-08-11T15:45:00-05:00",
      "timestampApprox": "Tuesday afternoon, August 11, 2020",
      "channel": "website",
      "verbatimText": "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.",
      "isVerbatimConfirmed": true,
      "sourceUrl": "https://www.news.iastate.edu/news/2020/08/11/wxupdates",
      "sourceDescription": "ISU News Service official storm recovery updates page, August 11, 2020: a website status update that served as the university's outage-notification channel",
      "annotations": [
        "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"
      ],
      "characterCount": 350
    }
  ],
  "context": "The [August 2020 Midwest derecho](https://en.wikipedia.org/wiki/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](https://www.news.iastate.edu/news/derecho-debrief-not-even-scientiststorm-chaser-expected-august-10-storm). When the storm reached [Iowa State University](https://en.wikipedia.org/wiki/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](https://www.news.iastate.edu/news/2020/08/11/wxupdates) 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](https://en.wikipedia.org/wiki/August_2020_Midwest_derecho), some for more than a week. Four people died in the broader storm, though no Iowa State community members were among the fatalities.",
  "keyFindings": [
    "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"
  ],
  "sources": [
    {
      "title": "A derecho debrief: Not even a scientist/storm chaser expected the August 10 storm -- Iowa State News Service",
      "url": "https://www.news.iastate.edu/news/derecho-debrief-not-even-scientiststorm-chaser-expected-august-10-storm",
      "type": "official-archive"
    },
    {
      "title": "Storm recovery updates -- Iowa State News Service",
      "url": "https://www.news.iastate.edu/news/2020/08/11/wxupdates",
      "type": "official-archive"
    },
    {
      "title": "August 2020 Midwest derecho -- Wikipedia",
      "url": "https://en.wikipedia.org/wiki/August_2020_Midwest_derecho",
      "type": "other"
    },
    {
      "title": "DERECHO 2020: 5 years ago, the brutal storm of August 10, 2020, caused $12 billion in damage -- The News",
      "url": "https://www.thenews-ia.com/stories/derecho-2020-5-years-ago-the-summer-storm-of-august-10-2020-destroyed-parts-of-iowas-tree,152977",
      "type": "local-media"
    },
    {
      "title": "Iowa State professor: nobody expected the August 10 derecho -- KCRG",
      "url": "https://www.kcrg.com/2020/09/02/iowa-state-professor-nobody-expected-the-august-10-derecho-research-continues/",
      "type": "local-media"
    }
  ],
  "confidence": "high",
  "tags": [
    "derecho",
    "severe-storm",
    "iowa-state",
    "ames",
    "power-outage",
    "tree-damage",
    "shelter-in-place",
    "weather",
    "summer-2020"
  ],
  "dateAdded": "2026-05-14",
  "lastUpdated": "2026-07-20",
  "addedBy": "ingestion"
}