Headline:
Flash Flood Warning issued September 6 at 1:37PM CDT until September 6 at 4:00PM CDT by NWS Sioux Falls SD
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
September 6, 2026 - 11:37am
Expires:
September 6, 2026 - 2:00pm
Description:
At 137 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain moving back into the area from the
west, especially near the Minnesota-Iowa state line from Ellsworth to
Bigelow. Between 2 and 3.5 inches of rain have fallen across the
warned area. The expected rainfall rate is 1 to 3 inches in 1 hour.
Additional rainfall amounts of 1.5 to 3 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...
Worthington, Ellsworth, Little Rock, Rushmore and Bigelow.
Instruction:
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.
Area Description:
Lyon, IA; Osceola, IA; Nobles, MN
Forcast Office:
NWS Sioux Falls SD
Sender:
w-nws.webmaster@noaa.gov