Illinois alerts

Stephenson County, Illinois weather alerts

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

Checked Sun, Sep 20, 2026, 1:31 PM CDT. Times are Central Daylight Time.

Stephenson County forecastLive radar here

Warnings on the map

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

Every watch, warning and advisory the National Weather Service has in force over Stephenson County, Illinois 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 Stephenson 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 Stephenson County

In the past year the National Weather Service issued 114 alerts for Stephenson County, including 25 severe thunderstorm warnings, 9 tornado warnings, 4 flash flood warnings and 3 freeze warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning25Aug 21, 2026
Tornado Warning9Jul 3, 2026
Flash Flood Warning4Sep 19, 2026
Freeze Warning3Apr 20, 2026
Extreme Heat Warning2Jul 27, 2026
Flood Warning2Apr 17, 2026
High Wind Warning2Mar 15, 2026
Blizzard Warning1Mar 15, 2026
Extreme Cold Warning1Jan 22, 2026
Red Flag Warning1Feb 18, 2026
Winter Storm Warning1Nov 29, 2025
Severe Thunderstorm Watch10Aug 21, 2026
Tornado Watch6Jun 11, 2026
Flood Watch5Sep 19, 2026
Extreme Heat Watch2Jul 26, 2026
Winter Storm Watch2Mar 15, 2026
Extreme Cold Watch1Jan 23, 2026
Fire Weather Watch1Feb 18, 2026
Dense Fog Advisory11Aug 13, 2026
Wind Advisory7Mar 12, 2026
Winter Weather Advisory7Mar 16, 2026
Cold Weather Advisory4Jan 26, 2026
Frost Advisory4May 11, 2026
Heat Advisory3Sep 1, 2026

Warnings issued

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

The 40 most recent of 114.

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 Stephenson 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.