Flash Flood Warning — Franklin 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 6:18AM CDT until August 6 at 8:15AM CDT by NWS St Louis MO
At 618 AM CDT, the heaviest rain had come to an end. However, flash flooding was ongoing. Emergency management reported flash flooding causing road closures. Flash flooding will continue even as the rain has decreased in intensity. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Emergency management reported. 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... Washington, Union, Sullivan, Pacific, St. Clair, Villa Ridge, Gray Summit, Parkway, Miramiguoa Park, Lonedell, Moselle, Piney Park, Robertsville, Catawissa, Stanton and Lyon. This includes the following State Parks... Robertsville State Park and Meramec State Park. This includes Interstate 44 in Missouri between exits 225 and 257.
Effective August 6, 2026 at 7:18 AM ET · Expires August 6, 2026 at 9:15 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS St Louis MO
Expires
August 6, 2026 at 9:15 AM ET
Last Checked
2 minutes 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
Flash Flood Warning
Flood Advisory
Flood Advisory
Flood Advisory
Get Flash Flood Warning Alerts for Franklin County
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Frequently Asked Questions
What does a Flash Flood Warning mean for Franklin 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 (2 minutes ago). It's set to expire August 6, 2026 at 9:15 AM ET.
How do I get notified about Flash Flood Warning alerts for Franklin County?
Download StormCast free on Google Play and set Franklin 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.