Flash Flood Warning — Warren 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 5:43AM CDT until August 6 at 8:30AM CDT by NWS St Louis MO
At 543 AM CDT, Doppler radar indicated that the heaviest rainfall had ended. However, rain gauges indicate between 1 and 3 inches of rain have fallen. Areas of flash flooding are likely to continue. 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... Warrenton, Wright City, Hermann, Marthasville, Jonesburg, Truesdale, Innsbrook, Treloar, Big Spring, Dutzow, Foristell, High Hill, Rhineland, McKittrick, Holstein and Americus. This includes Interstate 70 in Missouri between exits 179 and 200.
Effective August 6, 2026 at 6:43 AM ET · Expires August 6, 2026 at 9:30 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS St Louis MO
Expires
August 6, 2026 at 9:30 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.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Missouri
Flood Warning
Flash Flood Warning
Flood Advisory
Flood Advisory
Flash Flood Warning
Flood Advisory
Get Flash Flood Warning Alerts for Warren 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 Warren 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 9:30 AM ET.
How do I get notified about Flash Flood Warning alerts for Warren County?
Download StormCast free on Google Play and set Warren 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.
What other areas does this alert cover?
This same Flash Flood Warning is also in effect for Montgomery County.