Flash Flood Warning — Knox County, Tennessee
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 11 at 10:00PM EDT until August 12 at 12:00AM EDT by NWS Morristown TN
FFWMRX The National Weather Service in Morristown has issued a * Flash Flood Warning for... Northwestern Blount County in east Tennessee... Southwestern Knox County in east Tennessee... * Until midnight EDT. * At 1000 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 0.5 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 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... Knoxville, Farragut and Bearden. This includes Interstate 40 in Tennessee between mile markers 372 and 383.
Effective August 11, 2026 at 10:00 PM ET · Expires August 12, 2026 at 12:00 AM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Morristown TN
Expires
August 12, 2026 at 12:00 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.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Tennessee
Flash Flood Warning
Flash Flood Warning
Flood Advisory
Flood Advisory
Flood Advisory
Flood Advisory
Get Flash Flood Warning Alerts for Knox County
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Frequently Asked Questions
What does a Flash Flood Warning mean for Knox County, Tennessee?
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 12, 2026 at 12:00 AM ET.
How do I get notified about Flash Flood Warning alerts for Knox County?
Download StormCast free on Google Play and set Knox County, Tennessee 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 Blount County.