This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Day County Area Flooding — July 2026 →
Flood Warning issued July 31 at 12:12AM CDT until July 31 at 9:15AM CDT by NWS Aberdeen SD
This is a severe-significance flood warning event affecting Big Stone, MN; Traverse, MN; Day, SD; Marshall, SD; Roberts, SD, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flood Warning
- Extent
- ≈ 489,001 acres
- Began
- To end
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Affected area map
The shaded area is the affected-area perimeter reported for this event by NOAA / National Weather Service (Big Stone, MN; Traverse, MN; Day, SD; Marshall, SD; Roberts, SD), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
Big Stone, MN; Traverse, MN; Day, SD; Marshall, SD; Roberts, SD · ≈ 770 sq mi reported extent · Enable JavaScript to explore the map.
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
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Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Forecast discussion NWS ABR
Area Forecast Discussion
Showers end this morning, then dry weekend weather arrives with upper 90s to low 100s and elevated fire risk due to strong southerly winds reaching 30–40 mph on Sunday.
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000 FXUS63 KABR 311134 AAA AFDABR
Area Forecast Discussion...UPDATED National Weather Service Aberdeen SD 634 AM CDT Fri Jul 31 2026
.KEY MESSAGES...
- Once lingering showers move out this morning, expect a dry forecast through the weekend.
- Temperatures into the upper 90s to low 100s return over parts of central and north central South Dakota this weekend. Temperatures are set to cool down to below normal by the middle of next week.
- Above normal temperatures and strong southerly wind gusts will combine to create elevated fire weather concerns over central and north central South Dakota this weekend, particularly on Sunday when gusts reach as high as 30-40 miles per hour.
&&
.UPDATE... Issued at 630 AM CDT Fri Jul 31 2026
Aviation discussion updated below for the 12Z TAFs.
&&
.DISCUSSION... Issued at 249 AM CDT Fri Jul 31 2026
Some light rain showers linger over northeastern South Dakota and western Minnesota this morning. Storms yesterday produced a fairly extensive swath of 4"-6" in total precipitation (as of roughly 07Z) and MRMS estimates indicate that some localized areas may have received as much as 6"-8". While lingering showers are expected to be fairly light…
- Bulletin NWS Aberdeen SD
Flood Warning issued
Big Stone, MN; Traverse, MN; Day, SD; Marshall, SD; Roberts, SD
- Storm report NWS ABR storm report
FLASH FLOOD — 1 SSE Aberdeen, SD
Photo and Video of street flooding at S Penn St and 5th Ave SE in Aberdeen sent via Social Media. At deepest, standing water comes roughly halfway up car tires. Multiple cars appear stalled and/or abandoned.
- Storm report NWS ABR storm report
FLASH FLOOD — 1 SE Aberdeen, SD
Report from mPING: Street/road flooding; Street/road closed; Vehicles stranded.
Show 5 earlier updates
- NWS ABR storm report Storm report
- NWS ABR storm report Storm report
- cowboystatedaily.com News
50 Years Ago: Floating Toilet Saved Cheyenne Man In Devastating Big Thompson Flood
- Niagara Now News
PHOTOS: Severe flooding throughout NOTL after overnight storm
- english.nv.ua News
Torrential rains and typhoons kill dozens and leave hundreds missing across Asia
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.