{
  "slug": "alert-3ca57fdb8e0735acbe165a1933641f500af7a7fd-002-1",
  "url": "https://605buzz.com/articles/alert-3ca57fdb8e0735acbe165a1933641f500af7a7fd-002-1",
  "title": "Severe Thunderstorm Watch issued Aug. 12, 2026 by NWS Aberdeen SD",
  "dek": "Severe Thunderstorm Watch issued August 11 at 10:24PM CDT until August 12 at 1:00AM CDT by NWS Aberdeen SD. Areas named: Brown, SD; Campbell, SD; Corson, SD; Day, SD; Dewey, SD; Edmunds, SD; McPherson, SD; Marshall, SD; Walworth, SD. Whether this alert is still in effect is shown on the page, computed from its stated expiry when you load it.",
  "vertical": "public-safety",
  "publishedAt": "2026-08-13T22:01:39.572Z",
  "updatedAt": "2026-09-07T23:36:05.342Z",
  "provenance": {
    "sourceUrl": "https://www.weather.gov/",
    "noticeReceivedDate": "2026-08-12",
    "contentHash": "4bd02b68897d56f9dcbb34edc61e2b822095e101d3b02dbefdd3286a10428bba",
    "editorialTier": "tier1-auto-publish",
    "provenanceEnum": "template-assembled",
    "correctionCount": 2,
    "humanReviewed": false
  },
  "bodyMd": "**NWS Aberdeen SD issued a Severe Thunderstorm Watch** on Aug. 11, 2026, 9:24 p.m. MDT / 10:24 p.m. CDT, according to the National Weather Service's public alert record.\n\nThe alert states an effective time of Aug. 11, 2026, 9:24 p.m. MDT / 10:24 p.m. CDT, an onset of Aug. 11, 2026, 9:24 p.m. MDT / 10:24 p.m. CDT, and an expiry of Aug. 12, 2026, 12 a.m. MDT / 1 a.m. CDT. South Dakota spans two time zones and this alert may reach both, so each instant is shown in Mountain and then Central time; the office's own published offset is preserved in the machine-readable record.\n\nThe alert separately states that the hazard itself ends at Aug. 12, 2026, 12 a.m. MDT / 1 a.m. CDT. That is a different field from the message's expiry above and the two can differ.\n\nWhether this alert is currently in effect is not stated in this text, deliberately: it depends on the time you are reading, so 605Buzz computes it from the expiry above each time the page is loaded rather than storing an answer that would go out of date without anyone noticing. The status shown at the top of this page is the computed one.\n\nThe issuing office classified this message as severity \"Severe\", certainty \"Possible\" and urgency \"Future\". Those are the National Weather Service's own categories, reproduced exactly; 605Buzz does not re-rank them or translate them into a scale of its own.\n\nThe recommended response type on the message is \"Monitor\".\n\nThe alert names these areas: Brown, SD; Campbell, SD; Corson, SD; Day, SD; Dewey, SD; Edmunds, SD; McPherson, SD; Marshall, SD; Walworth, SD. The National Weather Service zone codes are SDC013, SDC021, SDC031, SDC037, SDC041, SDC045, SDC089, SDC091 and SDC129.\n\nThe full text of the alert as issued on Aug. 11, 2026, 9:24 p.m. MDT / 10:24 p.m. CDT, reproduced without changes:\n\n> SEVERE THUNDERSTORM WATCH 570 REMAINS VALID UNTIL 1 AM CDT\n> /MIDNIGHT MDT/ WEDNESDAY FOR THE FOLLOWING AREAS\n>\n> IN SOUTH DAKOTA THIS WATCH INCLUDES 9 COUNTIES\n>\n> IN NORTH CENTRAL SOUTH DAKOTA\n>\n> CAMPBELL              CORSON                DEWEY\n> EDMUNDS               MCPHERSON             WALWORTH\n>\n> IN NORTHEAST SOUTH DAKOTA\n>\n> BROWN                 DAY                   MARSHALL\n>\n> THIS INCLUDES THE CITIES OF ABERDEEN, BRITTON, EUREKA, HERREID,\n> IPSWICH, ISABEL, MCINTOSH, MOBRIDGE, AND WEBSTER.\n\nThe message carries no separate protective-action text.\n\nThe National Weather Service superseded this message at Aug. 11, 2026, 11:46 p.m. MDT / Aug. 12, 2026, 12:46 a.m. CDT with a later one. This article records the message as issued.\n\nThis alert is a work of the United States federal government — the National Weather Service, part of NOAA — and is in the **public domain**; no copyright is claimed on it and none is asserted here. 605Buzz reproduces the record and does not add meteorological judgement. For live conditions and alerts, go to the [National Weather Service](https://www.weather.gov/).\n\n605Buzz publishes alerts the National Weather Service gave a window of two hours or longer, and checks once a day. Short-notice warnings — including tornado and severe thunderstorm warnings, which the service typically issues for under an hour — are NOT carried here, so their absence from this site says nothing about whether one was issued. For those, and for live conditions, go to the [National Weather Service](https://www.weather.gov/).",
  "corrections": {
    "versionCount": 3,
    "correctionCount": 2,
    "ledgerUrl": "https://605buzz.com/corrections"
  }
}