Headline:
Flash Flood Warning issued May 17 at 1:10AM CDT until May 17 at 5:15AM CDT by NWS Sioux Falls SD
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
May 16, 2026 - 11:10pm
Expires:
May 17, 2026 - 3:15am
Description:
FFWFSD
The National Weather Service in Sioux Falls has issued a
* Flash Flood Warning for...
Southwestern Plymouth County in northwestern Iowa...
East Central Union County in southeastern South Dakota...
* Until 515 AM CDT.
* At 110 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. The expected rainfall rate is 0.5 to 1 inch 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.
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.
Area Description:
Plymouth, IA; Union, SD
Forcast Office:
NWS Sioux Falls SD
Sender: