Indiana alerts

Union County, Indiana weather alerts

1 National Weather Service alert is in force for Union County: a flood watch.

Checked Mon, Sep 21, 2026, 6:23 AM EDT. Times are Eastern Daylight Time.

Union County forecastLive radar here

Warnings on the map

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

Every watch, warning and advisory the National Weather Service has in force over Union County, Indiana Open the live map with warnings and watches

Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.

Alerts in force1

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

Flood Watch

Severe

Flood Watch issued September 21 at 1:43AM EDT until September 21 at 12:00PM EDT by NWS Wilmington OH

Issued Until 5 hr 36 min left

Areas Wayne, IN; Fayette, IN; Union, IN; Franklin, IN; Ripley, IN; Dearborn, IN; Hardin, OH; Mercer, OH; Auglaize, OH; Darke, OH; Shelby, OH; Logan, OH; Union, OH; Delaware, OH; Miami, OH; Champaign, OH; Clark, OH; Madison, OH; Franklin, OH; Licking, OH; Preble, OH; Montgomery, OH; Greene, OH; Fayette, OH; Pickaway, OH; Fairfield, OH; Butler, OH; Warren, OH; Clinton, OH; Ross, OH; Hocking, OH; Hamilton, OH; Clermont, OH; Brown, OH; Highland, OH; Adams, OH; Pike, OH; Scioto, OH

Full text

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Indiana, including the following counties, Dearborn, Fayette, Franklin, Ripley, Union and Wayne and Ohio, including the following counties, Adams, Auglaize, Brown, Butler, Champaign, Clark, Clermont, Clinton, Darke, Delaware, Fairfield, Fayette, Franklin, Greene, Hamilton, Hardin, Highland, Hocking, Licking, Logan, Madison, Mercer, Miami, Montgomery, Pickaway, Pike, Preble, Ross, Scioto, Shelby, Union and Warren. * WHEN...Until noon EDT today. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional showers and thunderstorms will move across the area this morning. Locally heavy rain is possible and with the ground saturated from earlier rainfall, this additional rain could lead to flash flooding.

What to do

People in the watch area should keep an eye on the weather and be prepared for immediate action should heavy rains and flooding occur or a Flash Flood Warning be issued. Avoid low-lying areas and be careful when approaching highway dips and underpasses.

NWS Wilmington OHShare this alert

The past year in Union County

In the past year the National Weather Service issued 149 alerts for Union County, including 22 severe thunderstorm warnings, 8 flash flood warnings, 7 flood warnings and 5 freeze warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning22Sep 20, 2026
Flash Flood Warning8Aug 12, 2026
Flood Warning7Aug 13, 2026
Freeze Warning5Apr 20, 2026
Extreme Cold Warning2Jan 27, 2026
High Wind Warning2Mar 15, 2026
Winter Storm Warning2Jan 24, 2026
Extreme Heat Warning1Jun 30, 2026
Tornado Warning1Aug 1, 2026
Severe Thunderstorm Watch14Aug 11, 2026
Flood Watch9Sep 20, 2026
Tornado Watch4Jun 17, 2026
Freeze Watch2Apr 7, 2026
Winter Storm Watch2Jan 24, 2026
Extreme Cold Watch1Jan 26, 2026
Flood Advisory22Sep 20, 2026
Dense Fog Advisory12Sep 13, 2026
Cold Weather Advisory9Feb 7, 2026
Winter Weather Advisory8Mar 2, 2026
Wind Advisory7Mar 15, 2026
Frost Advisory6May 3, 2026
Heat Advisory3Sep 1, 2026

Warnings issued

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

The 40 most recent of 149.

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 Union 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.