Alert archive / Illinois / Red Flag Warnings
Red Flag Warnings in Illinois, 2026
9 red flag warnings in 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 2026. Tap one for its archive.
- Red Flag Warnings
- 9
- Busiest month
- February6 red flag warnings
- Busiest day
- February 18, 20263 red flag 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 12:18 AM CST | Red Flag Warning | ILX | Fulton, Knox, McLean, Marshall, Mason, Peoria and 3 more | 17 hr |
| Feb 18, 12:30 AM CST | Red Flag Warning | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 18 hr |
| Feb 18, 1:00 AM CST | Red Flag Warning | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 17 hr |
| Feb 27, 12:28 AM CST | Red Flag Warning | LSX | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 2 more | 18 hr |
| Feb 27, 1:22 AM CST | Red Flag Warning | ILX | Cass, Fulton, Knox, Logan, Marshall, Mason and 9 more | 17 hr |
| Feb 27, 1:35 AM CST | Red Flag Warning | DVN | Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 4 more | 16 hr |
| 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 County3
- Henderson County3
- Mercer County3
- Rock Island County3
- Fulton County2
- Knox County2
- Marshall County2
- Mason County2
- Peoria County2
- Stark County2
- Tazewell County2
- Woodford County2
- Bureau County2
- Henry County2
- Jo Daviess County2
- McDonough County2
- Putnam County2
- Warren County2
- Whiteside County2
- Madison County2
- McLean County1
- Carroll County1
- Stephenson County1
- Boone County1
- Cook County1
- DeKalb County1
- DuPage County1
- Ford County1
- Grundy County1
- Iroquois County1
- Kane County1
- Kankakee County1
- Kendall County1
- Lake County1
- LaSalle County1
- Lee County1
- Livingston County1
- McHenry County1
- Ogle County1
- Will County1
34 more counties
- Winnebago County1
- Adams County1
- Brown County1
- Calhoun County1
- Greene County1
- Jersey County1
- Macoupin County1
- Pike County1
- Cass County1
- Logan County1
- Menard County1
- Morgan County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Bond County1
- Clinton County1
- Fayette 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
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.