Johnson County, Tennessee weather alerts
No watches, warnings or advisories are in force for Johnson County.
Checked Sun, Sep 20, 2026, 3:33 PM EDT. Times are Eastern Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Johnson County, Tennessee. Open it for the live map, where it pans and zooms.
Open the live map with warnings and watches
Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.
Alerts in force
Nothing is in force for Johnson County right now. Its warnings come from the National Weather Service and appear here within a minute of being issued; every one of the past year is below.
The past year in Johnson County
In the past year the National Weather Service issued 85 alerts for Johnson County, including 12 severe thunderstorm warnings, 2 flash flood warnings, 2 winter storm warnings and 1 extreme cold warning.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 12 | Aug 17, 2026 |
| Flash Flood Warning | 2 | Aug 17, 2026 |
| Winter Storm Warning | 2 | Jan 30, 2026 |
| Extreme Cold Warning | 1 | Jan 31, 2026 |
| Freeze Warning | 1 | May 3, 2026 |
| High Wind Warning | 1 | Mar 15, 2026 |
| Tornado Warning | 1 | Jul 28, 2026 |
| Flood Watch | 7 | Aug 12, 2026 |
| Severe Thunderstorm Watch | 4 | Aug 17, 2026 |
| Extreme Cold Watch | 2 | Jan 31, 2026 |
| Winter Storm Watch | 2 | Jan 30, 2026 |
| High Wind Watch | 1 | Mar 15, 2026 |
| Flood Advisory | 16 | Sep 18, 2026 |
| Wind Advisory | 12 | Apr 27, 2026 |
| Winter Weather Advisory | 9 | Mar 16, 2026 |
| Dense Fog Advisory | 6 | Apr 26, 2026 |
| Cold Weather Advisory | 5 | Feb 7, 2026 |
| Heat Advisory | 1 | Jun 30, 2026 |
Warnings issued
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Freeze Warning
- High Wind Warning
- Extreme Cold Warning
- Winter Storm Warning
- Winter Storm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
Every alert, most recent first
- Flood Advisory
- Flood Advisory
- Flood Advisory
- Flood Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Flash Flood Warning
- Flood Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flash Flood Warning
- Flood Advisory
- Flood Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flood Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Flood Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Watch
- Flood Watch
- Flood Watch
- Flood Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Advisory
- Severe Thunderstorm Warning
- Heat Advisory
- Flood Watch
- Flood Advisory
- Flood Watch
- Flood Watch
- Flood Watch
- Freeze Warning
The 40 most recent of 85.
From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each date links to the event at the IEM.
Nearby
The counties around Johnson County, with what is in force in each.
What this means
- Warning
- The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
- Watch
- Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
- Advisory
- A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
- Statement
- Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.
Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.
Sources
Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.