{
  "slug": "alert-c553f5ec8fa254d8727c748fa5c6163c7af9d972-001-1",
  "url": "https://605buzz.com/articles/alert-c553f5ec8fa254d8727c748fa5c6163c7af9d972-001-1",
  "title": "Flash Flood Warning issued Sept. 6, 2026 by NWS Sioux Falls SD",
  "dek": "Flash Flood Warning issued September 6 at 3:52PM CDT until September 6 at 6:00PM CDT by NWS Sioux Falls SD. Areas named: Brookings, SD; Minnehaha, SD; Moody, 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": "2026-09-07T12:03:06.881Z",
  "updatedAt": null,
  "provenance": {
    "sourceUrl": "https://www.weather.gov/",
    "noticeReceivedDate": "2026-09-06",
    "contentHash": "7621b870a5d838c5212069ef2ba0324c124f4dd4e5df83123cedd741ddf7b112",
    "editorialTier": "tier1-auto-publish",
    "provenanceEnum": "template-assembled",
    "correctionCount": 0,
    "humanReviewed": false
  },
  "bodyMd": "**NWS Sioux Falls SD issued a Flash Flood Warning** on Sept. 6, 2026, 2:52 p.m. MDT / 3:52 p.m. CDT, according to the National Weather Service's public alert record.\n\nThe alert states an effective time of Sept. 6, 2026, 2:52 p.m. MDT / 3:52 p.m. CDT, an onset of Sept. 6, 2026, 2:52 p.m. MDT / 3:52 p.m. CDT, and an expiry of Sept. 6, 2026, 5 p.m. MDT / 6 p.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 Sept. 6, 2026, 5 p.m. MDT / 6 p.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so 605Buzz computes it from the expiry above each time the page is loaded rather than storing an answer that would go out of date without anyone noticing.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 \"Likely\" and urgency \"Immediate\". 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 \"Avoid\".\n\nThe alert names these areas: Brookings, SD; Minnehaha, SD; Moody, SD. The National Weather Service zone codes are SDC011, SDC099 and SDC101.\n\nThe issuing office's own summary line, as written on Sept. 6, 2026, 2:52 p.m. MDT / 3:52 p.m. CDT:\n\n> FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING FOR SOUTHEASTERN BROOKINGS, EASTERN MOODY AND NORTHEASTERN MINNEHAHA COUNTIES\n\nThe full text of the alert as issued on Sept. 6, 2026, 2:52 p.m. MDT / 3:52 p.m. CDT, reproduced without changes:\n\n> At 352 PM CDT, Doppler radar and automated rain gauges indicated\n> thunderstorms producing heavy rain across the warned area. Between 2\n> and 4 inches of rain have fallen. The expected rainfall rate is up to\n> 0.5 inches in 1 hour. Additional rainfall amounts up to 0.5 inches\n> are possible in the warned area. Flash flooding is ongoing or\n> expected to begin shortly.\n>\n> HAZARD...Flash flooding caused by thunderstorms.\n>\n> SOURCE...Radar and automated gauges.\n>\n> IMPACT...Flash flooding of small creeks and streams, urban areas,\n> highways, streets and underpasses as well as other poor\n> drainage and low-lying areas.\n>\n> Some locations that will experience flash flooding include...\n> Flandreau, Garretson, Elkton, White, Egan, Trent, Sherman,\n> Palisades State Park, Bushnell and Flandreau Santee Sioux Tribal\n> Nation.\n\nThe protective-action text the issuing office attached, reproduced without changes:\n\n> Turn around, don't drown when encountering flooded roads. Most flood\n> deaths occur in vehicles.\n>\n> Be aware of your surroundings and do not drive on flooded roads.\n>\n> Flooding is occurring or is imminent. It is important to know where\n> you are relative to streams, rivers, or creeks which can become\n> killers in heavy rains. Campers and hikers should avoid streams or\n> creeks.\n>\n> Please report observed flooding to local emergency services or law\n> enforcement and request they pass this information to the National\n> Weather Service when you can do so safely.\n\nThe National Weather Service superseded this message at Sept. 6, 2026, 4:54 p.m. MDT / 5:54 p.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/).",
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    "correctionCount": 0,
    "ledgerUrl": "https://605buzz.com/corrections"
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}