Flash Flood Warning — Johnson 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 17 at 5:32PM EDT until August 17 at 8:30PM EDT by NWS Morristown TN
FFWMRX The National Weather Service in Morristown has issued a * Flash Flood Warning for... Northeastern Carter County in east Tennessee... Johnson County in east Tennessee... Northern Sullivan County in east Tennessee... Southwestern Russell County in southwestern Virginia... Eastern Scott County in southwestern Virginia... Southern Washington County in southwestern Virginia... The City of Bristol in southwestern Virginia... * Until 830 PM EDT. * At 532 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across 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... Kingsport, Bristol Tn, Bristol Va, Abingdon, Mountain City, Gate City, Weber City, Walnut Hill
Effective August 17, 2026 at 5:32 PM ET · Expires August 17, 2026 at 8:30 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Morristown TN
Expires
August 17, 2026 at 8:30 PM ET
Last Checked
just now
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Tennessee
Severe Thunderstorm Watch
Flash Flood Warning
Severe Thunderstorm Watch
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Flood Advisory
Get Flash Flood Warning Alerts for Johnson County
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Frequently Asked Questions
What does a Flash Flood Warning mean for Johnson 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 (just now). It's set to expire August 17, 2026 at 8:30 PM ET.
How do I get notified about Flash Flood Warning alerts for Johnson County?
Download StormCast free on Google Play and set Johnson 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 Sullivan County, Scott County, Washington County, Carter County, City of Bristol County, Russell County.