Alert archive / Illinois / Excessive Heat Warnings
Excessive Heat Warnings in Illinois, 2024
6 excessive heat warnings in 2024. 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 excessive heat warnings reaches back to 2005.
Excessive Heat Warnings by county
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Excessive Heat Warnings
- 6
- Busiest month
- August4 excessive heat warnings
- Busiest day
- August 25, 20243 excessive heat 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 |
|---|---|---|---|---|
| Jul 28, 3:27 AM CDT | Excessive Heat Warning | LSX | Madison, Monroe, Randolph, Saint Clair, Washington | 5 days |
| Jul 29, 2:32 PM CDT | Excessive Heat Warning | PAH | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more | 3 days |
| Aug 25, 2:11 AM CDT | Excessive Heat Warning | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 66 hr |
| Aug 25, 2:27 AM CDT | Excessive Heat Warning | ILX | Fulton, Knox, Peoria, Schuyler, Stark | 42 hr |
| Aug 25, 2:13 PM CDT | Excessive Heat Warning | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 54 hr |
| Aug 26, 1:55 PM CDT | Excessive Heat Warning | ILX | Cass, Champaign, DeWitt, Fulton, Knox, Logan and 15 more | 30 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fulton County2
- Knox County2
- Peoria County2
- Schuyler County2
- Stark County2
- Madison County1
- Monroe County1
- Randolph County1
- Saint Clair County1
- Washington County1
- Alexander County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Hardin County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Massac County1
- Perry County1
- Pope County1
- Pulaski County1
- Saline County1
- Union County1
- White County1
- Williamson County1
- Bureau County1
- Carroll County1
- Hancock County1
- Henderson County1
- Henry County1
- Jo Daviess County1
- McDonough County1
- Mercer County1
- Putnam County1
- Rock Island County1
- Stephenson County1
- Warren County1
- Whiteside County1
- Boone County1
33 more counties
- 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
- Cass County1
- Champaign County1
- DeWitt County1
- Logan County1
- McLean County1
- Macon County1
- Marshall County1
- Mason County1
- Menard County1
- Morgan County1
- Piatt County1
- Sangamon County1
- Scott County1
- Tazewell County1
- Vermilion County1
- Woodford County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20232025
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.