Tennessee alerts

Cannon County, Tennessee weather alerts

1 National Weather Service alert is in force for Cannon County: a heat advisory.

Checked Sun, Sep 20, 2026, 2:45 PM CDT. Times are Central Daylight Time.

Cannon County forecastLive radar here

Warnings on the map

Every watch, warning and advisory the National Weather Service has in force over Cannon County, Tennessee. Open it for the live map, where it pans and zooms.

Every watch, warning and advisory the National Weather Service has in force over Cannon County, Tennessee Open the live map with warnings and watches

Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.

Alerts in force1

Every product in force for Cannon County, worst first, with its full text.

Heat Advisory

Moderate

Heat Advisory issued September 19 at 10:42PM CDT until September 20 at 7:00PM CDT by NWS Nashville TN

Issued Until 4 hr 14 min left

Areas Stewart, TN; Montgomery, TN; Robertson, TN; Sumner, TN; Macon, TN; Clay, TN; Houston, TN; Humphreys, TN; Dickson, TN; Cheatham, TN; Davidson, TN; Wilson, TN; Trousdale, TN; Smith, TN; Jackson, TN; Putnam, TN; Overton, TN; Perry, TN; Hickman, TN; Lewis, TN; Williamson, TN; Maury, TN; Marshall, TN; Rutherford, TN; Cannon, TN; De Kalb, TN; White, TN; Bedford, TN; Coffee, TN; Warren, TN; Wayne, TN; Lawrence, TN; Giles, TN

Full text

* WHAT...Heat index values up to 108. * WHERE...Across Middle Tennessee. * WHEN...Until 7 PM CDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

What to do

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

NWS Nashville TNShare this alert

The past year in Cannon County

In the past year the National Weather Service issued 56 alerts for Cannon County, including 7 severe thunderstorm warnings, 2 extreme heat warnings, 2 flash flood warnings and 1 extreme cold warning.

ProductIssuedMost recent
Severe Thunderstorm Warning7Aug 17, 2026
Extreme Heat Warning2Aug 14, 2026
Flash Flood Warning2Aug 11, 2026
Extreme Cold Warning1Jan 26, 2026
Winter Storm Warning1Jan 24, 2026
Severe Thunderstorm Watch6Aug 17, 2026
Flood Watch5Jul 21, 2026
Tornado Watch2Mar 15, 2026
Extreme Heat Watch1Jun 29, 2026
Winter Storm Watch1Jan 23, 2026
Dense Fog Advisory14Aug 27, 2026
Heat Advisory6Sep 15, 2026
Cold Weather Advisory3Jan 31, 2026
Freezing Fog Advisory2Jan 22, 2026
Wind Advisory2Mar 15, 2026
Flood Advisory1Jul 11, 2026

Warnings issued

  1. Severe Thunderstorm Warning
  2. Extreme Heat Warning
  3. Flash Flood Warning
  4. Flash Flood Warning
  5. Extreme Heat Warning
  6. Severe Thunderstorm Warning
  7. Severe Thunderstorm Warning
  8. Severe Thunderstorm Warning
  9. Severe Thunderstorm Warning
  10. Severe Thunderstorm Warning
  11. Severe Thunderstorm Warning
  12. Extreme Cold Warning
  13. Winter Storm Warning
Every alert, most recent first
  1. Heat Advisory
  2. Heat Advisory
  3. Dense Fog Advisory
  4. Severe Thunderstorm Warning
  5. Severe Thunderstorm Watch
  6. Extreme Heat Warning
  7. Flash Flood Warning
  8. Heat Advisory
  9. Heat Advisory
  10. Flash Flood Warning
  11. Flood Watch
  12. Severe Thunderstorm Watch
  13. Heat Advisory
  14. Flood Advisory
  15. Flood Watch
  16. Heat Advisory
  17. Severe Thunderstorm Watch
  18. Extreme Heat Watch
  19. Extreme Heat Warning
  20. Severe Thunderstorm Watch
  21. Flood Watch
  22. Severe Thunderstorm Warning
  23. Severe Thunderstorm Warning
  24. Flood Watch
  25. Dense Fog Advisory
  26. Dense Fog Advisory
  27. Severe Thunderstorm Watch
  28. Severe Thunderstorm Warning
  29. Dense Fog Advisory
  30. Severe Thunderstorm Warning
  31. Severe Thunderstorm Warning
  32. Severe Thunderstorm Warning
  33. Tornado Watch
  34. Wind Advisory
  35. Severe Thunderstorm Watch
  36. Dense Fog Advisory
  37. Dense Fog Advisory
  38. Dense Fog Advisory
  39. Cold Weather Advisory
  40. Extreme Cold Warning

The 40 most recent of 56.

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 Cannon 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.