Flash Flood Warning for Sioux, IA; Union, SD
Official alert fields
What you need to know
- Effective
- Ends or expires
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
FFWFSD The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Southwestern Sioux County in northwestern Iowa... Northeastern Union County in southeastern South Dakota... * Until 415 AM CDT. * At 115 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing...
What the bulletin says to do
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. 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.
Full official description
Bulletin details
FFWFSD The National Weather Service in Sioux Falls has issued a * Flash Flood Warning for... Southwestern Sioux County in northwestern Iowa... Northeastern Union County in southeastern South Dakota... * Until 415 AM CDT. * At 115 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3.5 inches of rain have fallen. The expected rainfall rate is 1.5 to 3 inches in 1 hour. Additional rainfall amounts up to 1 inch 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... Hawarden and Alcester.
Official geometry where available
Alert boundary
Lifecycle record
Official revisions
- Alert
Flash Flood Warning issued October 9 at 1:15AM CDT until October 9 at 4:15AM CDT by NWS Sioux Falls SD
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Sioux Falls SD. This page reorganizes official fields and does not add a forecast or expand the affected area.
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