Alert archive / Illinois / Jefferson County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Jefferson County, Illinois, 2026

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

Jefferson County and its neighbors

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

Severe Thunderstorm Warnings
18
Busiest month
March7 severe thunderstorm warnings
Busiest day
March 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 7, 5:57 AM CSTSevere Thunderstorm WarningPAH24 min
Mar 11, 5:24 AM CDTSevere Thunderstorm WarningPAH51 min
Mar 11, 6:07 AM CDTSevere Thunderstorm WarningPAH53 min
Mar 11, 12:02 PM CDTSevere Thunderstorm WarningPAH43 min
Mar 11, 12:37 PM CDTSevere Thunderstorm WarningPAH38 min
Mar 15, 6:24 PM CDTSevere Thunderstorm WarningPAH51 min
Mar 15, 6:36 PM CDTSevere Thunderstorm WarningPAH39 min
Apr 27, 8:44 AM CDTSevere Thunderstorm WarningPAH46 min
Apr 27, 8:26 PM CDTSevere Thunderstorm WarningPAH64 min
Apr 27, 8:45 PM CDTSevere Thunderstorm WarningPAH60 min
May 16, 4:54 PM CDTSevere Thunderstorm WarningPAH21 min
May 16, 4:58 PM CDTSevere Thunderstorm WarningPAH32 min
May 16, 5:16 PM CDTSevere Thunderstorm WarningPAH29 min
Jun 16, 6:31 PM CDTSevere Thunderstorm WarningPAH44 min
Jun 16, 7:05 PM CDTSevere Thunderstorm WarningPAH25 min
Aug 12, 5:16 PM CDTSevere Thunderstorm WarningPAH44 min
Aug 22, 3:24 AM CDTSevere Thunderstorm WarningPAH51 min
Aug 22, 3:54 AM CDTSevere Thunderstorm WarningPAH17 min

The busiest days

Days with the most alerts issued, by UTC date.

  1. March 11, 20264severe thunderstorm warnings
  2. May 16, 20263severe thunderstorm warnings
  3. March 15, 20262severe thunderstorm warnings
  4. April 28, 20262severe thunderstorm warnings
  5. August 22, 20262severe thunderstorm warnings
  6. March 7, 20261severe thunderstorm warnings
  7. April 27, 20261severe thunderstorm warnings
  8. June 16, 20261severe thunderstorm warnings
  9. June 17, 20261severe thunderstorm warnings
  10. August 12, 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.