{
  "slug": "alert-463f382d905e3c361c4d10865ec6d7c4cb8e1bf0-002-1",
  "url": "https://605buzz.com/articles/alert-463f382d905e3c361c4d10865ec6d7c4cb8e1bf0-002-1",
  "title": "Severe Thunderstorm Watch issued Sept. 2, 2026 by NWS Sioux Falls SD",
  "dek": "Severe Thunderstorm Watch issued September 2 at 1:02AM CDT until September 2 at 5:00AM CDT by NWS Sioux Falls SD. Areas named: Buena Vista, IA; Cherokee, IA; Clay, IA; Dickinson, IA; Ida, IA; O'Brien, IA; Osceola, IA; Plymouth, IA; Sioux, IA; Woodbury, IA; Dakota, NE; Dixon, NE; Union, 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": "2026-09-06T12:01:36.327Z",
  "updatedAt": null,
  "provenance": {
    "sourceUrl": "https://www.weather.gov/",
    "noticeReceivedDate": "2026-09-02",
    "contentHash": "94cf4c4b9811233eb3b5bb7665e9901b883949aeadc22f9eedbcd9af51740b85",
    "editorialTier": "tier1-auto-publish",
    "provenanceEnum": "template-assembled",
    "correctionCount": 0,
    "humanReviewed": false
  },
  "bodyMd": "**NWS Sioux Falls SD issued a Severe Thunderstorm Watch** on Sept. 2, 2026, 12:02 a.m. MDT / 1:02 a.m. CDT, according to the National Weather Service's public alert record.\n\nThe alert states an effective time of Sept. 2, 2026, 12:02 a.m. MDT / 1:02 a.m. CDT, an onset of Sept. 2, 2026, 12:02 a.m. MDT / 1:02 a.m. CDT, and an expiry of Sept. 2, 2026, 4 a.m. MDT / 5 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 Sept. 2, 2026, 4 a.m. MDT / 5 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so 605Buzz computes it from the expiry above each time the page is loaded rather than storing an answer that would go out of date without anyone noticing.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: Buena Vista, IA; Cherokee, IA; Clay, IA; Dickinson, IA; Ida, IA; O'Brien, IA; Osceola, IA; Plymouth, IA; Sioux, IA; Woodbury, IA; Dakota, NE; Dixon, NE; Union, SD. The National Weather Service zone codes are IAC021, IAC035, IAC041, IAC059, IAC093, IAC141, IAC143, IAC149, IAC167, IAC193, NEC043, NEC051 and SDC127.\n\nThe full text of the alert as issued on Sept. 2, 2026, 12:02 a.m. MDT / 1:02 a.m. CDT, reproduced without changes:\n\n> SEVERE THUNDERSTORM WATCH 640 REMAINS VALID UNTIL 5 AM CDT EARLY\n> THIS MORNING FOR THE FOLLOWING AREAS\n>\n> IN IOWA THIS WATCH INCLUDES 10 COUNTIES\n>\n> IN NORTHWEST IOWA\n>\n> BUENA VISTA           CHEROKEE              CLAY\n> DICKINSON             O'BRIEN               OSCEOLA\n> PLYMOUTH              SIOUX\n>\n> IN WEST CENTRAL IOWA\n>\n> IDA                   WOODBURY\n>\n> IN NEBRASKA THIS WATCH INCLUDES 2 COUNTIES\n>\n> IN NORTHEAST NEBRASKA\n>\n> DAKOTA                DIXON\n>\n> IN SOUTH DAKOTA THIS WATCH INCLUDES 1 COUNTY\n>\n> IN SOUTHEAST SOUTH DAKOTA\n>\n> UNION\n>\n> THIS INCLUDES THE CITIES OF ALCESTER, ALLEN, ARNOLDS PARK,\n> BATTLE CREEK, BERESFORD, CHEROKEE, ELK POINT, HARTLEY, HAWARDEN,\n> HOLSTEIN, HULL, IDA GROVE, JEFFERSON, LE MARS, MILFORD,\n> NORTH SIOUX CITY, ORANGE CITY, PONCA, ROCK VALLEY, SANBORN,\n> SHELDON, SIBLEY, SIOUX CENTER, SIOUX CITY, SOUTH SIOUX CITY,\n> SPENCER, SPIRIT LAKE, STORM LAKE, AND WAKEFIELD.\n\nThe message carries no separate protective-action text.\n\nThe National Weather Service superseded this message at Sept. 2, 2026, 4:19 a.m. MDT / 5:19 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": 1,
    "correctionCount": 0,
    "ledgerUrl": "https://605buzz.com/corrections"
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}