Alert archive / Illinois / Excessive Heat Watches
Excessive Heat Watches in Illinois, 2024
3 excessive heat watches 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 watches reaches back to 2005.
Excessive Heat Watches by county
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Excessive Heat Watches
- 3
- Busiest month
- August3 excessive heat watches
- Busiest day
- August 25, 20242 excessive heat watches
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 |
|---|---|---|---|---|
| Aug 24, 2:32 PM CDT | Excessive Heat Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 48 hr |
| Aug 25, 2:11 AM CDT | Excessive Heat Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 37 hr |
| Aug 25, 2:27 AM CDT | Excessive Heat Watch | ILX | Cass, Champaign, DeWitt, Fulton, Knox, Logan and 15 more | 35 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- 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
- 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
- Cass County1
- Champaign County1
- DeWitt County1
- Fulton County1
- Knox County1
- Logan County1
- McLean County1
- Macon County1
- Marshall 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.