Alert archive / Illinois / Knox County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Knox County, Illinois, 2026

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

Knox County and its neighbors

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

Severe Thunderstorm Warnings
26
Busiest month
April8 severe thunderstorm warnings
Busiest day
June 11, 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
Mar 10, 6:52 PM CDTSevere Thunderstorm WarningILX23 min
Mar 10, 7:14 PM CDTSevere Thunderstorm Warning Considerable damage threatILX41 min
Mar 10, 7:18 PM CDTSevere Thunderstorm WarningILX27 min
Mar 31, 7:54 AM CDTSevere Thunderstorm WarningILX51 min
Mar 31, 8:35 AM CDTSevere Thunderstorm WarningILX40 min
Apr 2, 6:00 PM CDTSevere Thunderstorm WarningILX45 min
Apr 2, 6:31 PM CDTSevere Thunderstorm WarningILX44 min
Apr 17, 5:30 PM CDTSevere Thunderstorm WarningILX45 min
Apr 17, 5:58 PM CDTSevere Thunderstorm Warning Considerable damage threatILX47 min
Apr 17, 6:38 PM CDTSevere Thunderstorm Warning Considerable damage threatILX37 min
Apr 17, 7:21 PM CDTSevere Thunderstorm Warning Considerable damage threatILX54 min
Apr 17, 7:58 PM CDTSevere Thunderstorm Warning Considerable damage threatILX49 min
Apr 27, 9:37 AM CDTSevere Thunderstorm WarningILX23 min
May 4, 5:46 PM CDTSevere Thunderstorm WarningILX44 min
May 4, 6:27 PM CDTSevere Thunderstorm WarningILX24 min
May 4, 7:19 PM CDTSevere Thunderstorm WarningILX41 min
May 4, 7:42 PM CDTSevere Thunderstorm WarningILX33 min
May 16, 4:45 AM CDTSevere Thunderstorm WarningILX33 min
Jun 10, 1:34 PM CDTSevere Thunderstorm WarningILX26 min
Jun 10, 7:24 PM CDTSevere Thunderstorm WarningILX66 min
Jun 10, 8:53 PM CDTSevere Thunderstorm WarningILX52 min
Jun 11, 11:47 AM CDTSevere Thunderstorm WarningILX43 min
Jun 11, 5:12 PM CDTSevere Thunderstorm WarningILX48 min
Jun 17, 8:14 AM CDTSevere Thunderstorm WarningILX61 min
Jul 20, 12:37 PM CDTSevere Thunderstorm WarningILX53 min
Aug 12, 7:44 AM CDTSevere Thunderstorm WarningILX61 min

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 11, 20264severe thunderstorm warnings
  2. April 17, 20263severe thunderstorm warnings
  3. March 11, 20262severe thunderstorm warnings
  4. March 31, 20262severe thunderstorm warnings
  5. April 2, 20262severe thunderstorm warnings
  6. April 18, 20262severe thunderstorm warnings
  7. May 4, 20262severe thunderstorm warnings
  8. May 5, 20262severe thunderstorm warnings
  9. March 10, 20261severe thunderstorm warnings
  10. April 27, 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.