Headline:
Flash Flood Warning issued May 17 at 1:49AM CDT until May 17 at 5:15AM CDT by NWS Sioux Falls SD
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
May 16, 2026 - 11:49pm
Expires:
May 17, 2026 - 3:15am
Description:
At 149 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between 2
and 3 inches of rain have fallen. The expected rainfall rate is 1 to
1.5 inches in 1 hour. Additional rainfall amounts of 0.5 to 1.5
inches are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by slow moving 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...
Elk Point.
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.
Be aware of your surroundings and do not drive on flooded roads.
Area Description:
Plymouth, IA; Union, SD
Forcast Office:
NWS Sioux Falls SD
Sender:
w-nws.webmaster@noaa.gov