Illinois alerts

Henderson County, Illinois weather alerts

3 National Weather Service alerts are in force for Henderson County: 3 flood watches.

Checked Sun, Sep 20, 2026, 7:51 PM CDT. Times are Central Daylight Time.

Henderson County forecastLive radar here

Warnings on the map

Every watch, warning and advisory the National Weather Service has in force over Henderson 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 Henderson 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 force3

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

Flood Watch

Severe

Flood Watch issued September 20 at 11:18AM CDT until September 25 at 1:00PM CDT by NWS Quad Cities IA IL

Begins Until 5 days left

Areas Des Moines, IA; Lee, IA; Henderson, IL; Hancock, IL

Full text

...The Flood Watch continues for the following rivers in Illinois... Iowa... Mississippi River at Keithsburg affecting Louisa, Des Moines, Mercer and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Burlington affecting Hancock, Des Moines, Lee and Henderson Counties. .Additional rainfall from today through Monday night is expected to be considerably lighter than what fell Thursday through Saturday night. This helps provide higher confidence in these river forecasts compared to 24 hours ago. * WHAT...Flooding is possible. * WHERE...Mississippi River at Burlington. * WHEN...From Wednesday morning to Friday afternoon. * ADDITIONAL DETAILS... - At 10:00 AM CDT Sunday the stage was 10.0 feet and rising. - Forecast...Flood stage may be reached late Wednesday morning. - Flood stage is 15.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. The next statement will be issued by Monday morning.

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Flood Watch

Severe

Flood Watch issued September 20 at 11:18AM CDT until September 26 at 4:00AM CDT by NWS Quad Cities IA IL

Begins Until 5 days left

Areas Des Moines, IA; Henderson, IL

Full text

...The Flood Watch continues for the following rivers in Illinois... Iowa... Mississippi River at Keithsburg affecting Louisa, Des Moines, Mercer and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Burlington affecting Hancock, Des Moines, Lee and Henderson Counties. .Additional rainfall from today through Monday night is expected to be considerably lighter than what fell Thursday through Saturday night. This helps provide higher confidence in these river forecasts compared to 24 hours ago. * WHAT...Flooding is possible. * WHERE...Mississippi River at Gladstone LD18. * WHEN...From late Tuesday night to late Friday night. * ADDITIONAL DETAILS... - At 11:00 AM CDT Sunday the stage was 4.7 feet and rising. - Forecast...Flood stage may be reached early Wednesday morning. - Flood stage is 10.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. The next statement will be issued by Monday morning.

NWS Quad Cities IA ILShare this alert

Flood Watch

Severe

Flood Watch issued September 20 at 11:18AM CDT until September 25 at 10:00AM CDT by NWS Quad Cities IA IL

Begins Until 5 days left

Areas Louisa, IA; Des Moines, IA; Mercer, IL; Henderson, IL

Full text

...The Flood Watch continues for the following rivers in Illinois... Iowa... Mississippi River at Keithsburg affecting Louisa, Des Moines, Mercer and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Burlington affecting Hancock, Des Moines, Lee and Henderson Counties. .Additional rainfall from today through Monday night is expected to be considerably lighter than what fell Thursday through Saturday night. This helps provide higher confidence in these river forecasts compared to 24 hours ago. * WHAT...Flooding is possible. * WHERE...Mississippi River at Keithsburg. * WHEN...From Tuesday evening to Friday morning. * ADDITIONAL DETAILS... - At 10:30 AM CDT Sunday the stage was 8.9 feet and rising. - Forecast...Flood stage may be reached late Tuesday evening. - Flood stage is 14.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. The next statement will be issued by Monday morning.

NWS Quad Cities IA ILShare this alert

The past year in Henderson County

In the past year the National Weather Service issued 115 alerts for Henderson County, including 25 severe thunderstorm warnings, 5 flash flood warnings, 3 extreme heat warnings and 3 flood warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning25Aug 12, 2026
Flash Flood Warning5Aug 19, 2026
Extreme Heat Warning3Sep 2, 2026
Flood Warning3Apr 17, 2026
Red Flag Warning3Mar 28, 2026
Freeze Warning2Apr 20, 2026
Blizzard Warning1Mar 15, 2026
Extreme Cold Warning1Jan 23, 2026
High Wind Warning1Mar 15, 2026
Tornado Warning1Apr 17, 2026
Winter Storm Warning1Nov 29, 2025
Flood Watch11Sep 16, 2026
Tornado Watch8Jun 11, 2026
Severe Thunderstorm Watch6Aug 13, 2026
Extreme Heat Watch2Jul 26, 2026
Fire Weather Watch2Feb 27, 2026
Extreme Cold Watch1Jan 23, 2026
Winter Storm Watch1Nov 29, 2025
Dense Fog Advisory12Sep 11, 2026
Wind Advisory8Apr 2, 2026
Heat Advisory7Aug 31, 2026
Winter Weather Advisory6Mar 16, 2026
Cold Weather Advisory4Jan 26, 2026
Frost Advisory1Oct 23, 2025

Warnings issued

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

The 40 most recent of 115.

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 Henderson 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.