Wisconsin alerts

Jefferson County, Wisconsin weather alerts

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

Checked Sun, Sep 20, 2026, 9:29 AM CDT. Times are Central Daylight Time.

Jefferson County forecastLive radar here

Radar

Reflectivity now over Jefferson County, Wisconsin. Open it to see warnings and watches on the map.

Open the live radar with warnings and watches

Radar mosaic and map layers from NOAA MRMS. 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 137 alerts for Jefferson County, including 29 severe thunderstorm warnings, 8 flood warnings, 8 tornado warnings and 5 flash flood warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning29Aug 18, 2026
Flood Warning8Apr 18, 2026
Tornado Warning8Jul 27, 2026
Flash Flood Warning5Apr 17, 2026
Freeze Warning2May 2, 2026
Winter Storm Warning2Mar 15, 2026
Blizzard Warning1Mar 15, 2026
Extreme Cold Warning1Jan 23, 2026
Extreme Heat Warning1Jun 29, 2026
High Wind Warning1Mar 12, 2026
Severe Thunderstorm Watch13Aug 21, 2026
Flood Watch8Sep 19, 2026
Tornado Watch4Jun 17, 2026
Extreme Cold Watch2Jan 23, 2026
Winter Storm Watch2Mar 15, 2026
Extreme Heat Watch1Jun 29, 2026
Dense Fog Advisory12Aug 13, 2026
Winter Weather Advisory12Mar 16, 2026
Frost Advisory7May 11, 2026
Wind Advisory6May 12, 2026
Flood Advisory5Apr 17, 2026
Cold Weather Advisory4Jan 26, 2026
Heat Advisory3Jul 27, 2026

Warnings issued

  1. Severe Thunderstorm Warning
  2. Severe Thunderstorm Warning
  3. Severe Thunderstorm Warning
  4. Severe Thunderstorm Warning
  5. Severe Thunderstorm Warning
  6. Severe Thunderstorm Warning
  7. Severe Thunderstorm Warning
  8. Tornado Warning
  9. Severe Thunderstorm Warning
  10. Severe Thunderstorm Warning
  11. Extreme Heat Warning
  12. Severe Thunderstorm Warning
  13. Severe Thunderstorm Warning
  14. Severe Thunderstorm Warning
  15. Severe Thunderstorm Warning
  16. Freeze Warning
  17. Flood Warning
  18. Flood Warning
  19. Flash Flood Warning
  20. Severe Thunderstorm Warning
  21. Flash Flood Warning
  22. Tornado Warning
  23. Severe Thunderstorm Warning
  24. Severe Thunderstorm Warning
  25. Tornado Warning
  26. Severe Thunderstorm Warning
  27. Severe Thunderstorm Warning
  28. Severe Thunderstorm Warning
  29. Flood Warning
  30. Flood Warning
  31. Flood Warning
  32. Flood Warning
  33. Flash Flood Warning
  34. Flash Flood Warning
  35. Severe Thunderstorm Warning
  36. Flood Warning
  37. Tornado Warning
  38. Severe Thunderstorm Warning
  39. Flash Flood Warning
  40. Tornado Warning
  41. Severe Thunderstorm Warning
  42. Severe Thunderstorm Warning
  43. Severe Thunderstorm Warning
  44. Tornado Warning
  45. Severe Thunderstorm Warning
  46. Severe Thunderstorm Warning
  47. Severe Thunderstorm Warning
  48. Tornado Warning
  49. Tornado Warning
  50. Blizzard Warning
  51. Winter Storm Warning
  52. High Wind Warning
  53. Extreme Cold Warning
  54. Flood Warning
  55. Winter Storm Warning
  56. Freeze Warning
  57. Severe Thunderstorm Warning
  58. Severe Thunderstorm Warning
Every alert, most recent first
  1. Flood Watch
  2. Severe Thunderstorm Watch
  3. Severe Thunderstorm Warning
  4. Severe Thunderstorm Warning
  5. Severe Thunderstorm Watch
  6. Dense Fog Advisory
  7. Severe Thunderstorm Watch
  8. Severe Thunderstorm Warning
  9. Severe Thunderstorm Warning
  10. Severe Thunderstorm Watch
  11. Severe Thunderstorm Warning
  12. Severe Thunderstorm Warning
  13. Severe Thunderstorm Watch
  14. Severe Thunderstorm Warning
  15. Tornado Warning
  16. Severe Thunderstorm Warning
  17. Heat Advisory
  18. Dense Fog Advisory
  19. Heat Advisory
  20. Heat Advisory
  21. Severe Thunderstorm Watch
  22. Severe Thunderstorm Warning
  23. Severe Thunderstorm Watch
  24. Extreme Heat Warning
  25. Extreme Heat Watch
  26. Severe Thunderstorm Watch
  27. Tornado Watch
  28. Severe Thunderstorm Warning
  29. Flood Watch
  30. Severe Thunderstorm Warning
  31. Severe Thunderstorm Warning
  32. Severe Thunderstorm Watch
  33. Severe Thunderstorm Warning
  34. Severe Thunderstorm Watch
  35. Wind Advisory
  36. Frost Advisory
  37. Frost Advisory
  38. Frost Advisory
  39. Frost Advisory
  40. Freeze Warning

The 40 most recent of 137.

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.