Alert archive / Illinois / Severe Thunderstorm Watches / 2026
Severe Thunderstorm Watches in Illinois, March 2026
9 severe thunderstorm watches in March 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in March 2026. Tap one for its archive.
- Severe Thunderstorm Watches
- 9
- Busiest day
- March 31, 20262 severe thunderstorm watches
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 |
|---|---|---|---|---|
| Mar 4, 2:32 PM CST | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 8 hr |
| Mar 6, 5:02 PM CST | Severe Thunderstorm Watch | SPC | Ford, Grundy, Iroquois, Kankakee, Livingston, Will | 4 hr |
| Mar 6, 10:28 PM CST | Severe Thunderstorm Watch | SPC | Calhoun, Jersey, Madison, Monroe, Randolph, Saint Clair | 5 hr |
| Mar 10, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 11 more | 7 hr |
| Mar 15, 5:42 PM CDT | Severe Thunderstorm Watch | SPC | Ford, Iroquois, Kankakee, Livingston | 6 hr |
| Mar 22, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Clay, Coles, Crawford, Cumberland, Edgar and 16 more | 6 hr |
| Mar 26, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Bureau, Cass, Champaign, Christian and 44 more | 8 hr |
| Mar 30, 9:21 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more | 6 hr |
| Mar 31, 9:25 AM CDT | Severe Thunderstorm Watch | SPC | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 7 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Will County5
- Ford County4
- Grundy County4
- Iroquois County4
- Kankakee County4
- Livingston County4
- Cook County3
- DeKalb County3
- DuPage County3
- Kane County3
- Kendall County3
- Lee County3
- LaSalle County3
- Edwards County2
- Franklin County2
- Gallatin County2
- Hamilton County2
- Jackson County2
- Jefferson County2
- Perry County2
- Saline County2
- Wabash County2
- Wayne County2
- White County2
- Williamson County2
- Boone County2
- Carroll County2
- Jo Daviess County2
- Lake County2
- McHenry County2
- Ogle County2
- Rock Island County2
- Stephenson County2
- Whiteside County2
- Winnebago County2
- Clark County2
- Coles County2
- Crawford County2
- Cumberland County2
- Edgar County2
54 more counties
- Jasper County2
- Lawrence County2
- Bureau County2
- Henry County2
- Mercer County2
- Putnam County2
- Alexander County1
- Hardin County1
- Johnson County1
- Massac County1
- Pope County1
- Pulaski County1
- Union County1
- Calhoun County1
- Jersey County1
- Madison County1
- Monroe County1
- Randolph County1
- Saint Clair County1
- Clay County1
- Effingham County1
- Richland County1
- Adams County1
- Brown County1
- Cass County1
- Champaign County1
- Christian County1
- DeWitt County1
- Douglas County1
- Fulton County1
- Hancock County1
- Henderson County1
- Knox County1
- Logan County1
- McDonough County1
- McLean County1
- Macon County1
- Marshall County1
- Mason County1
- Menard County1
- Morgan County1
- Moultrie County1
- Peoria County1
- Piatt County1
- Pike County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Shelby County1
- Stark County1
- Tazewell County1
- Vermilion County1
- Warren County1
- Woodford County1
Nearby
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.