Live incident briefing · Flood
Flood Warning: Southwestern Edmunds County in north central South Dakota... Southeastern Walworth County in north central South Dakota..
Official warning geography and instructions, rainfall outlook, gauge observations and forecasts, affected places, and source history.
- Official source updated
- 19 hr ago
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Official information and local resources
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
NWS Aberdeen SD · source Aug 29, 2026, 11:27 PM
State resourceSouth Dakota Office of Emergency Management↗federalNWPS gauge: Beaver Creek (South Central ND) at Linton↗federalOfficial Flood Warning↗federalUSGS gauge 06354580 (provisional)↗
In immediate danger? Call 911. Nature Says When is not an emergency service and does not determine whether an area is safe.
Verified context
What the latest evidence says
The Flood Warning has Severe severity and Expected urgency. The affected areas are Edmunds, SD, Walworth, SD.
From the primary source
Official incident details
Displayed directly from the issuing authority, with no generated paraphrase.
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Southwestern Edmunds County in north central South Dakota... Southeastern Walworth County in north central South Dakota... * WHEN...Until 930 PM CDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 623 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. - Radar estimates between a half inch to 3 inches have fallen, though total amounts are currently unknown. As storms continue to develop and move over the same areas, more rainfall is expected to add to what has already fallen. - Some locations that will experience flooding include... Mainly rural areas of Southwestern Edmunds and Southeastern Walworth Counties. - http://www.weather.gov/safety/flood
NWS Aberdeen SD · source Aug 29, 2026, 11:27 PM
Official forecast
NWS weather context
Official gauge and corroborating observation
River and flood-stage context
Source-timed facts
Current incident picture
Values stay attached to the authority and time that supplied them.
- Affected areas
- Edmunds, SD, Walworth, SD National Weather Service · source Aug 29, 2026, 11:27 PM
- County count
- 2 counties National Weather Service · source Aug 29, 2026, 11:27 PM
- Official alert
- Flood Warning National Weather Service · source Aug 29, 2026, 11:27 PM
- Severity
- Severe National Weather Service · source Aug 29, 2026, 11:27 PM
- Ugc county codes
- SDC045, SDC129 National Weather Service · source Aug 29, 2026, 11:27 PM
- Urgency
- Expected National Weather Service · source Aug 29, 2026, 11:27 PM
- Warning count
- 1 warnings National Weather Service · source Aug 29, 2026, 11:27 PM
- Represented population
- 9,153 people U.S. Census Bureau 2020 Decennial Census · source Apr 1, 2020, 12:00 AM
Geographic context
Incident area and nearby places
Map geometry shows the official source shape when available. It does not predict impact outside or inside the line.
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Map-equivalent affected-area text
Edmunds, SD; Walworth, SD
Source center: 45.315, -99.822. A point or perimeter is context, not a safety boundary.
- Edmunds, SD
- Walworth, SD
Material revisions
What changed
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Incident first observed.
Provenance and handoffs
Official sources
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state · emergencySouth Dakota Office of Emergency ManagementVerified Aug 30, 2026, 2:15 AMfederal · gaugeNWPS gauge: Beaver Creek (South Central ND) at LintonVerified Aug 30, 2026, 2:02 AMfederal · weatherOfficial Flood WarningVerified Aug 30, 2026, 2:15 AMfederal · gaugeUSGS gauge 06354580 (provisional)Verified Aug 30, 2026, 2:02 AM
How this briefing is assembled
Source facts are stored with source and retrieval times. The page renders stored records only. Optional generated context is omitted whenever validation fails and never controls emergency instructions, containment, road status, health guidance, or publication.