Alert archive / Illinois / Heat Advisories

Heat Advisories in Illinois, 2025

34 heat advisories in 2025. 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 2025. Tap one for its archive.

Heat Advisories
34
Busiest month
July19 heat advisories
Busiest day
July 22, 20256 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.

IssuedProductOfficeCountiesLasted
Jun 19, 1:56 PM CDTHeat AdvisoryLSXAdams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more7 days
Jun 20, 1:51 AM CDTHeat AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more8 days
Jun 20, 2:37 AM CDTHeat AdvisoryDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more4 days
Jun 20, 2:45 AM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more8 days
Jun 20, 3:50 AM CDTHeat AdvisoryLOTBoone, DeKalb, DuPage, Ford, Grundy, Iroquois and 11 more5 days
Jun 26, 3:05 AM CDTHeat AdvisoryDVNBureau, Carroll, Hancock, Henderson, Henry, McDonough and 5 more16 hr
Jul 16, 1:46 AM CDTHeat AdvisoryPAHAlexander, Jackson, Johnson, Massac, Pope, Pulaski and 2 more17 hr
Jul 16, 9:57 PM CDTHeat AdvisoryPAHAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more21 hr
Jul 18, 1:35 AM CDTHeat AdvisoryPAHAlexander, Johnson, Massac, Pope, Pulaski, Union17 hr
Jul 19, 2:48 AM CDTHeat AdvisoryPAHEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 11 more17 hr
Jul 19, 7:46 PM CDTHeat AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more9 days
Jul 21, 1:57 PM CDTHeat AdvisoryLSXAdams, Bond, Brown, Calhoun, Clinton, Fayette and 9 more9 days
Jul 22, 1:24 AM CDTHeat AdvisoryPAHJefferson6 days
Jul 22, 2:06 AM CDTHeat AdvisoryILXCass, Fulton, Knox, Marshall, Mason, Menard and 7 more17 hr
Jul 22, 3:02 AM CDTHeat AdvisoryDVNBureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more16 hr
Jul 22, 3:21 AM CDTHeat AdvisoryLOTBoone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more64 hr
Jul 22, 2:10 PM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more5 days
Jul 22, 2:17 PM CDTHeat AdvisoryDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more53 hr
Jul 26, 1:45 PM CDTHeat AdvisoryDVNHancock, Henderson, Henry, McDonough, Mercer, Rock Island and 2 more31 hr
Jul 27, 1:27 PM CDTHeat AdvisoryLOTBoone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more31 hr
Jul 27, 1:40 PM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more30 hr
Jul 27, 1:44 PM CDTHeat AdvisoryDVNBureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more30 hr
Jul 28, 1:18 PM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 25 more31 hr
Jul 28, 2:11 PM CDTHeat AdvisoryDVNHancock, Henderson, McDonough, Warren30 hr
Jul 29, 7:57 PM CDTHeat AdvisoryILXChristian, Clark, Clay, Coles, Crawford, Cumberland and 8 more23 hr
Aug 7, 1:31 PM CDTHeat AdvisoryDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more29 hr
Aug 14, 2:34 PM CDTHeat AdvisoryLSXAdams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more5 days
Aug 15, 11:40 AM CDTHeat AdvisoryDVNBureau, Carroll, Hancock, Henderson, Henry, McDonough and 5 more32 hr
Aug 15, 12:32 PM CDTHeat AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more3 days
Aug 16, 1:41 AM CDTHeat AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more4 days
Aug 16, 3:29 AM CDTHeat AdvisoryLOTFord, Grundy, Iroquois, Kankakee, Kendall, LaSalle and 3 more17 hr
Aug 17, 2:09 AM CDTHeat AdvisoryDVNBureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more18 hr
Aug 18, 3:03 AM CDTHeat AdvisoryDVNBureau, Hancock, Henderson, Henry, McDonough, Mercer and 4 more16 hr
Aug 19, 2:10 AM CDTHeat AdvisoryILXClay, Crawford, Effingham, Jasper, Lawrence, Richland17 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

62 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. July 22, 20256heat advisories
  2. June 20, 20254heat advisories
  3. July 27, 20253heat advisories
  4. July 28, 20252heat advisories
  5. August 15, 20252heat advisories
  6. August 16, 20252heat advisories
  7. June 19, 20251heat advisories
  8. June 26, 20251heat advisories
  9. July 16, 20251heat advisories
  10. July 17, 20251heat advisories
  11. July 18, 20251heat advisories
  12. July 19, 20251heat advisories

Nearby

Alerts in force nowTornadoes on recordThe radar archive20242026

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.