Alert archive / Illinois / Kankakee County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Kankakee County, Illinois, 2026

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

Kankakee County and its neighbors

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

Severe Thunderstorm Warnings: 24
Busiest month: March7 severe thunderstorm warnings
Busiest day: March 10, 20264 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

18 of 24 severe thunderstorm warnings covering Kankakee County in 2026 had a qualifying storm report inside them; 53 of 63 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.

Kankakee County, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	24	18	25%	63	84%	24 min

Each office's whole area, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Chicago, IL: severe thunderstorm warnings	265	167	37%	1,194	90%	30 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

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.

Issued	Product	Office	Lasted
Mar 10, 5:19 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	41 min
Mar 10, 6:02 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	58 min
Mar 10, 6:09 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	66 min
Mar 10, 6:45 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	75 min
Mar 10, 10:21 PM CDT	Severe Thunderstorm Warning	LOT	39 min
Mar 31, 9:09 AM CDT	Severe Thunderstorm Warning	LOT	52 min
Mar 31, 9:29 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	61 min
Apr 2, 10:52 PM CDT	Severe Thunderstorm Warning	LOT	68 min
Apr 13, 1:39 PM CDT	Severe Thunderstorm Warning	LOT	51 min
Apr 13, 2:07 PM CDT	Severe Thunderstorm Warning	LOT	38 min
Apr 13, 2:33 PM CDT	Severe Thunderstorm Warning	LOT	57 min
Apr 17, 9:05 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	70 min
Apr 17, 9:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	59 min
Jun 11, 2:10 PM CDT	Severe Thunderstorm Warning	LOT	65 min
Jul 4, 4:06 PM CDT	Severe Thunderstorm Warning	LOT	39 min
Jul 27, 1:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	74 min
Jul 27, 1:08 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	33 min
Jul 27, 3:48 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	57 min
Jul 27, 4:45 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	30 min
Aug 10, 12:36 AM CDT	Severe Thunderstorm Warning	LOT	69 min
Aug 11, 10:20 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	55 min
Aug 11, 10:49 AM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	56 min
Aug 12, 9:26 AM CDT	Severe Thunderstorm Warning	LOT	64 min
Aug 12, 10:14 AM CDT	Severe Thunderstorm Warning	LOT	61 min

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2025

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.