Alert archive / Illinois / Red Flag Warnings / 2026
Red Flag Warnings in Illinois, March 2026
3 red flag warnings 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 red flag warnings reaches back to 2005.
Red Flag Warnings by county
Each county as a circle sized by its count in March 2026. Tap one for its archive.
- Red Flag Warnings
- 3
- Busiest day
- March 29, 20262 red flag 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 |
|---|---|---|---|---|
| Mar 27, 11:59 AM CDT | Red Flag Warning | DVN | Hancock, Henderson, Jo Daviess, Mercer, Rock Island | 33 hr |
| Mar 29, 1:27 PM CDT | Red Flag Warning | LSX | Bond, Clinton, Fayette, Madison, Marion, Monroe and 3 more | 5 hr |
| Mar 29, 1:31 PM CDT | Red Flag Warning | PAH | Alexander, Franklin, Hamilton, Jackson, Jefferson, Johnson and 5 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Hancock County1
- Henderson County1
- Jo Daviess County1
- Mercer County1
- Rock Island County1
- Bond County1
- Clinton County1
- Fayette County1
- Madison County1
- Marion County1
- Monroe County1
- Randolph County1
- Saint Clair County1
- Washington County1
- Alexander County1
- Franklin County1
- Hamilton County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Perry County1
- Saline County1
- Union County1
- Wayne County1
- Williamson 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.