Alert archive / Illinois / Severe Thunderstorm Warnings / 2026

Severe Thunderstorm Warnings in Illinois, May 2026

82 severe thunderstorm warnings in May 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

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

Severe Thunderstorm Warnings: 82
Busiest day: May 16, 202624 severe thunderstorm warnings

Over time

By day

Days in UTC, the clock the archive keeps.

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	Counties	Lasted
May 3, 10:15 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	30 min
May 3, 10:38 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	45 min
May 3, 10:45 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Shelby	30 min
May 3, 11:52 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Shelby	23 min
May 4, 12:01 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin	18 min
May 4, 2:48 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair, Washington	42 min
May 4, 5:06 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Will	39 min
May 4, 5:08 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Rock Island, Whiteside	37 min
May 4, 5:33 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Henry, Mercer, Warren	42 min
May 4, 5:36 PM CDT	Severe Thunderstorm Warning	LOT	Cook	54 min
May 4, 5:42 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer	48 min
May 4, 5:46 PM CDT	Severe Thunderstorm Warning	ILX	Knox	44 min
May 4, 6:06 PM CDT	Severe Thunderstorm Warning	DVN	Henry	24 min
May 4, 6:08 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Madison	52 min
May 4, 6:10 PM CDT	Severe Thunderstorm Warning	DVN	Mercer, Warren	50 min
May 4, 6:11 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	34 min
May 4, 6:27 PM CDT	Severe Thunderstorm Warning	ILX	Knox, Peoria, Stark	24 min
May 4, 6:32 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	43 min
May 4, 6:37 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Bond, Montgomery	38 min
May 4, 6:49 PM CDT	Severe Thunderstorm Warning	LOT	LaSalle	41 min
May 4, 6:55 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Warren	49 min
May 4, 6:59 PM CDT	Severe Thunderstorm Warning	LOT	Will	31 min
May 4, 6:59 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	46 min
May 4, 7:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Bond, Fayette, Marion	80 min
May 4, 7:13 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, Kendall, LaSalle	34 min
May 4, 7:19 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Knox	41 min
May 4, 7:36 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson	54 min
May 4, 7:42 PM CDT	Severe Thunderstorm Warning	ILX	Knox, Marshall, Peoria, Stark	33 min
May 4, 7:59 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Woodford	31 min
May 4, 8:22 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	54 min
May 4, 8:34 PM CDT	Severe Thunderstorm Warning	ILX	Clay	41 min
May 4, 9:08 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas, Moultrie, Shelby	52 min
May 4, 9:10 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Jasper, Richland	11 min
May 4, 9:12 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Piatt, Sangamon	48 min
May 4, 9:49 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Shelby	41 min
May 4, 9:54 PM CDT	Severe Thunderstorm Warning	ILX	Mason, Tazewell	36 min
May 4, 10:10 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Fulton, Mason, Schuyler	35 min
May 4, 10:23 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Mason, Menard	37 min
May 4, 10:25 PM CDT	Severe Thunderstorm Warning	ILX	Moultrie	10 min
May 4, 10:40 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Mason, Menard, Morgan, Sangamon	35 min
May 4, 10:43 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, McLean, Macon	34 min
May 4, 11:31 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Menard, Morgan, Sangamon	29 min
May 16, 4:43 AM CDT	Severe Thunderstorm Warning	DVN	Bureau, Henry	47 min
May 16, 4:45 AM CDT	Severe Thunderstorm Warning	ILX	Knox, Stark	33 min
May 16, 4:58 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Marshall	51 min
May 16, 5:04 AM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	41 min
May 16, 5:25 AM CDT	Severe Thunderstorm Warning	LOT	LaSalle, Livingston	50 min
May 16, 7:46 AM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	29 min
May 16, 12:57 PM CDT	Severe Thunderstorm Warning	LSX	Adams	14 min
May 16, 2:10 PM CDT	Severe Thunderstorm Warning	PAH	Franklin	17 min
May 16, 3:17 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence	28 min
May 16, 3:20 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	40 min
May 16, 3:30 PM CDT	Severe Thunderstorm Warning	LSX	Clinton	60 min
May 16, 3:36 PM CDT	Severe Thunderstorm Warning	LSX	Marion	39 min
May 16, 3:45 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	30 min
May 16, 4:03 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	57 min
May 16, 4:13 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	47 min
May 16, 4:45 PM CDT	Severe Thunderstorm Warning	ILX	Clay	45 min
May 16, 4:54 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	21 min
May 16, 4:58 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson	32 min
May 16, 5:16 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Jasper, Richland	44 min
May 16, 5:16 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	29 min
May 16, 5:28 PM CDT	Severe Thunderstorm Warning	PAH	Wayne	47 min
May 16, 5:59 PM CDT	Severe Thunderstorm Warning	PAH	Edwards	16 min
May 16, 6:09 PM CDT	Severe Thunderstorm Warning	PAH	White	21 min
May 16, 6:14 PM CDT	Severe Thunderstorm Warning	PAH	Edwards	16 min
May 18, 3:47 AM CDT	Severe Thunderstorm Warning	DVN	Rock Island, Whiteside	32 min
May 18, 6:12 AM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	48 min
May 18, 7:21 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	39 min
May 18, 7:37 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	25 min
May 18, 8:18 AM CDT	Severe Thunderstorm Warning	ILX	Fulton, Logan, Mason, Peoria, Tazewell	39 min
May 18, 9:24 AM CDT	Severe Thunderstorm Warning	ILX	McLean, Marshall, Woodford	22 min
May 18, 9:36 AM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon, Piatt	39 min
May 18, 9:44 AM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas, Edgar	46 min
May 18, 9:49 AM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Shelby	41 min
May 18, 10:13 AM CDT	Severe Thunderstorm Warning	LOT	Grundy, Kendall, Will	37 min
May 18, 10:20 AM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Macon, Moultrie, Piatt	40 min
May 18, 10:28 AM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	47 min
May 18, 11:02 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	Cook	18 min
May 18, 6:13 PM CDT	Severe Thunderstorm Warning	PAH	Gallatin	27 min
May 31, 3:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	PAH	Alexander, Pulaski, Union	48 min
May 31, 4:16 PM CDT	Severe Thunderstorm Warning	PAH	Alexander, Pulaski	44 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

30 more counties

Nearby

Alerts in force now Tornadoes on record 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. Rebuilt daily.