Flash Flood Warning — Washington County, Missouri
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued August 6 at 6:49AM CDT until August 6 at 9:15AM CDT by NWS St Louis MO
At 649 AM CDT, most of the heavy rain had ended across Washington County. Between 2 and 4 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. 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... Potosi, Anthonies Mill, Mineral Point, Old Mines, Richwoods, Latty, Shirley and Cadet. This includes the following State Parks... Washington State Park.
Effective August 6, 2026 at 7:49 AM ET · Expires August 6, 2026 at 10:15 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS St Louis MO
Expires
August 6, 2026 at 10:15 AM ET
Last Checked
1 minute ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
Other Active Alerts in Missouri
Flood Warning
Flood Advisory
Flood Advisory
Flash Flood Warning
Flood Advisory
Flood Advisory
Get Flash Flood Warning Alerts for Washington County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Flash Flood Warning mean for Washington County, Missouri?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire August 6, 2026 at 10:15 AM ET.
How do I get notified about Flash Flood Warning alerts for Washington County?
Download StormCast free on Google Play and set Washington County, Missouri as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.