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public-safety

Flash Flood Warning issued Oct. 9, 2026 by NWS Sioux Falls SD

Flash Flood Warning issued October 9 at 1:15AM CDT until October 9 at 4:15AM CDT by NWS Sioux Falls SD. Areas named: Sioux, IA; Union, SD.

605Buzz automated newsroom, from public records Added Record date

Published automatically from public-record data — not yet reviewed by an editor. A language model shortens some articles by choosing whole sentences to delete; it cannot write, rephrase, reorder or add text. See /about. This article was not shortened: every word below is the template's.

NWS Sioux Falls SD issued a Flash Flood Warning on Oct. 9, 2026, 12:15 a.m. MDT / 1:15 a.m. CDT, according to the National Weather Service's public alert record.

The alert states an effective time of Oct. 9, 2026, 12:15 a.m. MDT / 1:15 a.m. CDT, an onset of Oct. 9, 2026, 12:15 a.m. MDT / 1:15 a.m. CDT, and an expiry of Oct. 9, 2026, 3:15 a.m. MDT / 4:15 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.

The alert separately states that the hazard itself ends at Oct. 9, 2026, 3:15 a.m. MDT / 4:15 a.m. CDT. That is a different field from the message's expiry above and the two can differ.

Whether 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so 605Buzz computes it from the expiry above each time the page is loaded rather than storing an answer that would go out of date without anyone noticing.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.

The 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.

The recommended response type on the message is "Avoid".

The alert names these areas: Sioux, IA; Union, SD. The National Weather Service zone codes are IAC167 and SDC127.

The full text of the alert as issued on Oct. 9, 2026, 12:15 a.m. MDT / 1:15 a.m. CDT, reproduced without changes:

FFWFSD

The National Weather Service in Sioux Falls has issued a

* Flash Flood Warning for... Southwestern Sioux County in northwestern Iowa... Northeastern Union County in southeastern South Dakota...

* Until 415 AM CDT.

* At 115 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3.5 inches of rain have fallen. The expected rainfall rate is 1.5 to 3 inches in 1 hour. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Hawarden and Alcester.

The protective-action text the issuing office attached, reproduced without changes:

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.

The National Weather Service superseded this message at Oct. 9, 2026, 3:14 a.m. MDT / 4:14 a.m. CDT with a later one. This article records the message as issued.

This 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.

605Buzz 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.

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