NWS Sioux Falls SDFF.W 0013September 6, 2026
Flash Flood Warning: Brookings, Minnehaha and Moody, SD
The National Weather Service office in Sioux Falls issued a flash flood warning for Brookings, Minnehaha and Moody in South Dakota, which was in force until 6:00 p.m. local time on September 6. It was the 13th flash flood warning the NWS office in Sioux Falls issued in 2026. South Dakota had 3 flash flood warnings in September 2026, against 3 in an average September of 2008-2025 (South Dakota's flash flood warnings by year).
ExpiredWarning
In force for 3.9 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Sioux Falls SD
- Area
- Brookings, Minnehaha and Moody
- State
- South Dakota
- Level
- Warning
- Issued
- 2:07 p.m. CDT, September 6, 2026
- Expires
- 6:00 p.m. CDT, September 6, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KFSD FF.W 0013
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWFSD The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Southeastern Brookings County in east central South Dakota... Eastern Moody County in east central South Dakota... Northeastern Minnehaha County in southeastern South Dakota... * Until 600 PM CDT. * At 207 PM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. The expected rainfall rate is 2 to 4 inches in 1 hour. Additional rainfall amounts of 2 to 4 inches 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... Flandreau, Garretson, Elkton, White, Egan, Trent, Sherman, Palisades State Park, Bushnell and Flandreau Santee Sioux Tribal Nation.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks. 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.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.