Alert archive / Illinois / Red Flag Warnings
Red Flag Warnings in Illinois, 2023
5 red flag warnings in 2023. 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 2023. Tap one for its archive.
- Red Flag Warnings
- 5
- Busiest month
- April4 red flag warnings
- Busiest day
- April 12, 20234 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 |
|---|---|---|---|---|
| Apr 12, 2:40 AM CDT | Red Flag Warning | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 16 hr |
| Apr 12, 2:48 AM CDT | Red Flag Warning | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 17 hr |
| Apr 12, 10:16 AM CDT | Red Flag Warning | ILX | Fulton, Knox, McLean, Marshall, Peoria, Stark and 2 more | 9 hr |
| Apr 12, 2:27 PM CDT | Red Flag Warning | DVN | Carroll, Hancock, Henderson, Jo Daviess, McDonough, Mercer and 3 more | 30 hr |
| Oct 21, 3:05 AM CDT | Red Flag Warning | LSX | Bond, Clinton, Madison, Marion, Monroe, Randolph and 2 more | 16 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Carroll County2
- Hancock County2
- Henderson County2
- Jo Daviess County2
- McDonough County2
- Mercer County2
- Rock Island County2
- Stephenson County2
- Warren County2
- 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
- Winnebago County1
- Bureau County1
- Henry County1
- Putnam County1
- Whiteside County1
- Fulton County1
- Knox County1
- McLean County1
- Marshall County1
- Peoria County1
- Stark County1
- Tazewell County1
- Woodford County1
- Bond County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20222024
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.