Missouri alerts

St. Clair County, Missouri weather alerts

No watches, warnings or advisories are in force for St. Clair County.

Checked Sun, Sep 20, 2026, 5:21 PM CDT. Times are Central Daylight Time.

St. Clair County forecastLive radar here

Warnings on the map

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

Every watch, warning and advisory the National Weather Service has in force over St. Clair County, Missouri 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 St. Clair 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 St. Clair County

In the past year the National Weather Service issued 159 alerts for St. Clair County, including 43 severe thunderstorm warnings, 13 flood warnings, 12 tornado warnings and 5 flash flood warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning43Sep 6, 2026
Flood Warning13Jun 23, 2026
Tornado Warning12Jul 9, 2026
Flash Flood Warning5Jul 9, 2026
Extreme Heat Warning3Sep 4, 2026
Freeze Warning2Mar 28, 2026
Extreme Cold Warning1Jan 25, 2026
Red Flag Warning1Feb 19, 2026
Winter Storm Warning1Jan 23, 2026
Flood Watch12Jul 10, 2026
Severe Thunderstorm Watch12Jul 4, 2026
Tornado Watch9Jun 17, 2026
Extreme Heat Watch3Sep 1, 2026
Freeze Watch1Nov 2, 2025
Winter Storm Watch1Jan 23, 2026
Flood Advisory14Jun 21, 2026
Dense Fog Advisory11Aug 20, 2026
Heat Advisory8Sep 14, 2026
Wind Advisory3Mar 15, 2026
Frost Advisory2Apr 5, 2026
Cold Weather Advisory1Jan 24, 2026
Winter Weather Advisory1Dec 1, 2025

Warnings issued

  1. Severe Thunderstorm Warning
  2. Severe Thunderstorm Warning
  3. Extreme Heat Warning
  4. Extreme Heat Warning
  5. Extreme Heat Warning
  6. Tornado Warning
  7. Flash Flood Warning
  8. Severe Thunderstorm Warning
  9. Severe Thunderstorm Warning
  10. Severe Thunderstorm Warning
  11. Severe Thunderstorm Warning
  12. Severe Thunderstorm Warning
  13. Flood Warning
  14. Severe Thunderstorm Warning
  15. Severe Thunderstorm Warning
  16. Severe Thunderstorm Warning
  17. Severe Thunderstorm Warning
  18. Flood Warning
  19. Flood Warning
  20. Flash Flood Warning
  21. Severe Thunderstorm Warning
  22. Flood Warning
  23. Flash Flood Warning
  24. Severe Thunderstorm Warning
  25. Severe Thunderstorm Warning
  26. Severe Thunderstorm Warning
  27. Severe Thunderstorm Warning
  28. Tornado Warning
  29. Flood Warning
  30. Flood Warning
  31. Flood Warning
  32. Flood Warning
  33. Flood Warning
  34. Flash Flood Warning
  35. Severe Thunderstorm Warning
  36. Flood Warning
  37. Severe Thunderstorm Warning
  38. Severe Thunderstorm Warning
  39. Severe Thunderstorm Warning
  40. Severe Thunderstorm Warning
  41. Severe Thunderstorm Warning
  42. Tornado Warning
  43. Tornado Warning
  44. Severe Thunderstorm Warning
  45. Severe Thunderstorm Warning
  46. Tornado Warning
  47. Tornado Warning
  48. Severe Thunderstorm Warning
  49. Tornado Warning
  50. Severe Thunderstorm Warning
  51. Severe Thunderstorm Warning
  52. Tornado Warning
  53. Severe Thunderstorm Warning
  54. Severe Thunderstorm Warning
  55. Flood Warning
  56. Flood Warning
  57. Tornado Warning
  58. Flash Flood Warning
  59. Severe Thunderstorm Warning
  60. Severe Thunderstorm Warning

And 21 earlier warnings.

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

The 40 most recent of 159.

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 St. Clair 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.