Alert archive / Illinois / Excessive Heat Warnings
Excessive Heat Warnings in Illinois, 2017
4 excessive heat warnings in 2017. 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 2017. Tap one for its archive.
- Excessive Heat Warnings
- 4
- Busiest month
- July4 excessive heat warnings
- Busiest day
- July 18, 20172 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 17, 3:00 PM CDT | Excessive Heat Warning | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 6 days |
| Jul 18, 3:07 PM CDT | Excessive Heat Warning | ILX | Cass, Christian, Clay, Crawford, Cumberland, Effingham and 18 more | 4 days |
| Jul 18, 3:08 PM CDT | Excessive Heat Warning | DVN | Hancock, Henderson, Henry, McDonough, Mercer, Rock Island and 1 more | 4 days |
| Jul 21, 12:30 PM CDT | Excessive Heat Warning | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 55 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Adams County1
- Bond County1
- Brown County1
- Calhoun County1
- Clinton County1
- Fayette County1
- Greene County1
- Jersey County1
- Macoupin County1
- Madison County1
- Marion County1
- Monroe County1
- Montgomery County1
- Pike County1
- Randolph County1
- Saint Clair County1
- Washington County1
- Cass County1
- Christian County1
- Clay County1
- Crawford County1
- Cumberland County1
- Effingham County1
- Fulton County1
- Jasper County1
- Knox County1
- Lawrence County1
- Logan County1
- Macon County1
- Mason County1
- Menard County1
- Morgan County1
- Moultrie County1
- Peoria County1
- Richland County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Shelby County1
- Stark County1
27 more counties
- Tazewell County1
- Hancock County1
- Henderson County1
- Henry County1
- McDonough County1
- Mercer County1
- Rock Island County1
- Warren County1
- Alexander County1
- Edwards 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
- Wabash County1
- Wayne County1
- White County1
- Williamson County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.