Headline:
Flash Flood Warning issued July 3 at 2:19AM CDT until July 3 at 4:00AM CDT by NWS Sioux Falls SD
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
July 3, 2026 - 12:19am
Expires:
July 3, 2026 - 2:00am
Description:
At 219 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 5 inches of rain have fallen, highest between Vermillion,
Maskell and Newcastle, and into Union County west of Elk Point. The
expected rainfall rate is less than 1 inch in 1 hour. Additional
rainfall amounts less than 1 inch are expected 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 especially urban areas, along with small
creeks and streams, highways, streets and underpasses, as
well as other poor drainage and low- lying areas.
Some locations that will experience flash flooding include...
Yankton, Vermillion, Lewis And Clark State Recreation Area, Elk
Point, Newcastle, Meckling and Maskell.
Instruction:
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.
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.
Area Description:
Dixon, NE; Bon Homme, SD; Clay, SD; Union, SD; Yankton, SD
Forcast Office:
NWS Sioux Falls SD
Sender: