Iowa alerts

Jefferson County, Iowa weather alerts

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

Checked Sun, Sep 20, 2026, 11:19 AM CDT. Times are Central Daylight Time.

Jefferson County forecastLive radar here

Warnings on the map

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

Every watch, warning and advisory the National Weather Service has in force over Jefferson County, Iowa 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 Jefferson 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 Jefferson County

In the past year the National Weather Service issued 116 alerts for Jefferson County, including 21 severe thunderstorm warnings, 6 tornado warnings, 3 extreme heat warnings and 3 red flag warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning21Sep 20, 2026
Tornado Warning6Aug 13, 2026
Extreme Heat Warning3Sep 2, 2026
Red Flag Warning3Mar 28, 2026
Flash Flood Warning2Aug 15, 2026
Freeze Warning2Apr 20, 2026
Blizzard Warning1Mar 15, 2026
Extreme Cold Warning1Jan 23, 2026
High Wind Warning1Mar 15, 2026
Winter Storm Warning1Nov 28, 2025
Tornado Watch11Jul 20, 2026
Flood Watch8Sep 16, 2026
Severe Thunderstorm Watch8Aug 13, 2026
Extreme Heat Watch2Jul 26, 2026
Fire Weather Watch2Feb 27, 2026
Winter Storm Watch2Mar 15, 2026
Extreme Cold Watch1Jan 23, 2026
High Wind Watch1Mar 15, 2026
Dense Fog Advisory14Sep 16, 2026
Heat Advisory7Aug 31, 2026
Wind Advisory7Apr 2, 2026
Winter Weather Advisory6Mar 16, 2026
Cold Weather Advisory4Jan 26, 2026
Frost Advisory2May 2, 2026

Warnings issued

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

The 40 most recent of 116.

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 Jefferson 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.