Extreme Heat Watches in Illinois
17 extreme heat watches since 1986. 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 extreme heat watches reaches back to 2005.
Extreme Heat Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Extreme Heat Watches
- 17
- Busiest year
- 20269 extreme heat watches
- Average year
- 9over 2 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Madison County5
- Monroe County5
- Saint Clair County5
- Clinton County4
- Mercer County4
- Rock Island County4
- Washington County4
- Alexander County3
- Bureau County3
- Carroll County3
- Cook County3
- Edwards County3
- Franklin County3
- Gallatin County3
- Hamilton County3
- Hancock County3
- Hardin County3
- Henderson County3
- Henry County3
- Jackson County3
- Jefferson County3
- Jersey County3
- Jo Daviess County3
- Johnson County3
- McDonough County3
- Massac County3
- Perry County3
- Pope County3
- Pulaski County3
- Putnam County3
- Saline County3
- Stephenson County3
- Union County3
- Wabash County3
- Warren County3
- Wayne County3
- White County3
- Whiteside County3
- Williamson County3
- Randolph County3
62 more counties
- Adams County2
- Bond County2
- Brown County2
- Calhoun County2
- Fayette County2
- Greene County2
- Macoupin County2
- Marion County2
- Montgomery County2
- Pike County2
- Boone County1
- Cass County1
- Champaign County1
- Christian County1
- Clark County1
- Clay County1
- Coles County1
- Crawford County1
- Cumberland County1
- DeKalb County1
- DeWitt County1
- Douglas County1
- DuPage County1
- Edgar County1
- Effingham County1
- Ford County1
- Fulton County1
- Grundy County1
- Iroquois County1
- Jasper County1
- Kane County1
- Kankakee County1
- Kendall County1
- Knox County1
- Lake County1
- LaSalle County1
- Lawrence County1
- Lee County1
- Livingston County1
- Logan County1
- McHenry County1
- McLean County1
- Macon County1
- Marshall County1
- Mason County1
- Menard County1
- Morgan County1
- Moultrie County1
- Ogle County1
- Peoria County1
- Piatt County1
- Richland County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Shelby County1
- Stark County1
- Tazewell County1
- Vermilion County1
- Will County1
- Winnebago County1
- Woodford County1
The latest extreme heat watches
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 12:27 PM CDT | Extreme Heat Watch | LSX | Clinton, Madison, Monroe, Randolph, Saint Clair, Washington | 11 hr |
| Aug 30, 12:20 PM CDT | Extreme Heat Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 10 hr |
| Aug 8, 2:05 AM CDT | Extreme Heat Watch | LSX | Clinton, Madison, Monroe, Randolph, Saint Clair, Washington | 23 hr |
| Jul 24, 1:38 AM CDT | Extreme Heat Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 59 hr |
| Jul 24, 1:12 AM CDT | Extreme Heat Watch | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 11 hr |
| Jun 27, 11:51 AM CDT | Extreme Heat Watch | LOT | Cook | 23 hr |
| Jun 27, 11:00 AM CDT | Extreme Heat Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 24 hr |
| Jun 27, 1:59 AM CDT | Extreme Heat Watch | LSX | Madison, Monroe, Saint Clair | 11 hr |
| Jun 27, 1:28 AM CDT | Extreme Heat Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 24 hr |
Nearby
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.