Alert archive / Illinois / Heat Advisories
Heat Advisories in Illinois, 2020
15 heat advisories in 2020. 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 heat advisories reaches back to 2005.
Heat Advisories by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Heat Advisories
- 15
- Busiest month
- July11 heat advisories
- Busiest day
- July 17, 20205 heat advisories
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 7, 2:38 PM CDT | Heat Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 28 hr |
| Jul 8, 3:27 AM CDT | Heat Advisory | LSX | Clinton, Madison, Marion, Monroe, Saint Clair, Washington | 40 hr |
| Jul 17, 1:59 AM CDT | Heat Advisory | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 65 hr |
| Jul 17, 3:04 AM CDT | Heat Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 41 hr |
| Jul 17, 3:10 AM CDT | Heat Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 64 hr |
| Jul 17, 3:36 AM CDT | Heat Advisory | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 40 hr |
| Jul 17, 3:39 AM CDT | Heat Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 40 hr |
| Jul 18, 7:55 PM CDT | Heat Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 19 more | 23 hr |
| Jul 24, 11:43 AM CDT | Heat Advisory | LSX | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 4 more | 56 hr |
| Jul 25, 2:30 AM CDT | Heat Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 41 hr |
| Jul 26, 2:30 AM CDT | Heat Advisory | ILX | Cass, Fulton, Knox, Logan, Marshall, Mason and 9 more | 16 hr |
| Aug 9, 1:54 PM CDT | Heat Advisory | LSX | Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more | 29 hr |
| Aug 9, 1:58 PM CDT | Heat Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 29 hr |
| Aug 24, 12:18 PM CDT | Heat Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 7 hr |
| Aug 25, 3:07 AM CDT | Heat Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 16 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bureau County5
- Carroll County5
- Hancock County5
- Henderson County5
- Henry County5
- Jo Daviess County5
- McDonough County5
- Mercer County5
- Putnam County5
- Rock Island County5
- Stephenson County5
- Warren County5
- Whiteside County5
- Madison County4
- Monroe County4
- Saint Clair County4
- Clinton County3
- Marion County3
- Washington County3
- Calhoun County3
- Greene County3
- Jersey County3
- Macoupin County3
- Cass County3
- Logan County3
- Menard County3
- Morgan County3
- Sangamon County3
- Scott County3
- Adams County2
- Bond County2
- Brown County2
- Fayette County2
- Montgomery County2
- Pike County2
- Randolph County2
- Alexander County2
- Edwards County2
- Franklin County2
- Gallatin County2
62 more counties
- Hamilton County2
- Hardin County2
- Jackson County2
- Jefferson County2
- Johnson County2
- Massac County2
- Perry County2
- Pope County2
- Pulaski County2
- Saline County2
- Union County2
- Wabash County2
- Wayne County2
- White County2
- Williamson County2
- Champaign County2
- Christian County2
- Clark County2
- Clay County2
- Coles County2
- Crawford County2
- Cumberland County2
- DeWitt County2
- Douglas County2
- Edgar County2
- Effingham County2
- Fulton County2
- Jasper County2
- Knox County2
- Lawrence County2
- Macon County2
- Marshall County2
- Mason County2
- Moultrie County2
- Peoria County2
- Piatt County2
- Richland County2
- Schuyler County2
- Shelby County2
- Stark County2
- Tazewell County2
- Vermilion County2
- Woodford 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
- McLean County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.