Alert archive / Illinois / Excessive Heat Watches
Excessive Heat Watches in Illinois, 2018
3 excessive heat watches in 2018. 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 2018. Tap one for its archive.
- Excessive Heat Watches
- 3
- Busiest month
- June3 excessive heat watches
- Busiest day
- June 14, 20181 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 |
|---|---|---|---|---|
| Jun 14, 4:00 AM CDT | Excessive Heat Watch | LOT | 53 hr | |
| Jun 25, 3:32 PM CDT | Excessive Heat Watch | LSX | Calhoun, Clinton, Greene, Jersey, Macoupin, Madison and 4 more | 36 hr |
| Jun 27, 3:09 PM CDT | Excessive Heat Watch | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more | 36 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Calhoun County1
- Clinton County1
- Greene County1
- Jersey County1
- Macoupin County1
- Madison County1
- Monroe County1
- Randolph County1
- Saint Clair County1
- Washington County1
- Boone 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
- Winnebago County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.