Alert archive / Iowa / Union County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Union County, Iowa, 2026

17 severe thunderstorm warnings in 2026. An alert counts here when it covered this county. The archive of severe thunderstorm warnings reaches back to 1986.

Union County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Severe Thunderstorm Warnings
17
Busiest month
April6 severe thunderstorm warnings
Busiest day
April 15, 20264 severe thunderstorm warnings

Over time

By month

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Apr 15, 12:10 AM CDTSevere Thunderstorm WarningDMX50 min
Apr 15, 12:45 AM CDTSevere Thunderstorm WarningDMX45 min
Apr 15, 3:59 PM CDTSevere Thunderstorm WarningDMX26 min
Apr 15, 4:31 PM CDTSevere Thunderstorm WarningDMX44 min
Apr 23, 7:09 PM CDTSevere Thunderstorm WarningDMX66 min
Apr 23, 7:59 PM CDTSevere Thunderstorm WarningDMX61 min
May 15, 6:52 PM CDTSevere Thunderstorm Warning Considerable damage threatDMX53 min
May 15, 7:27 PM CDTSevere Thunderstorm Warning Considerable damage threatDMX63 min
May 18, 6:22 PM CDTSevere Thunderstorm WarningDMX53 min
Jun 5, 9:41 PM CDTSevere Thunderstorm WarningDMX64 min
Jun 5, 11:02 PM CDTSevere Thunderstorm WarningDMX32 min
Jun 5, 11:38 PM CDTSevere Thunderstorm WarningDMX67 min
Jun 11, 5:59 AM CDTSevere Thunderstorm Warning Considerable damage threatDMX61 min
Jun 11, 6:43 AM CDTSevere Thunderstorm Warning Considerable damage threatDMX47 min
Jun 13, 10:18 AM CDTSevere Thunderstorm WarningDMX42 min
Sep 6, 3:45 PM CDTSevere Thunderstorm WarningDMX45 min
Sep 14, 8:24 PM CDTSevere Thunderstorm WarningDMX51 min

The busiest days

Days with the most alerts issued, by UTC date.

  1. April 15, 20264severe thunderstorm warnings
  2. June 6, 20263severe thunderstorm warnings
  3. April 24, 20262severe thunderstorm warnings
  4. June 11, 20262severe thunderstorm warnings
  5. May 15, 20261severe thunderstorm warnings
  6. May 16, 20261severe thunderstorm warnings
  7. May 18, 20261severe thunderstorm warnings
  8. June 13, 20261severe thunderstorm warnings
  9. September 6, 20261severe thunderstorm warnings
  10. September 15, 20261severe thunderstorm warnings

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive2025

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.