Alert archive / Illinois / Areal Flood Warnings
Areal Flood Warnings in Illinois, 2026
43 areal flood warnings in 2026. 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 areal flood warnings reaches back to 2005.
Areal Flood Warnings by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Areal Flood Warnings
- 43
- Busiest month
- July12 areal flood warnings
- Busiest day
- August 15, 20266 areal flood 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 |
|---|---|---|---|---|
| Mar 5, 7:51 AM CST | Areal Flood Warning | PAH | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 3 hr |
| Apr 4, 1:59 AM CDT | Areal Flood Warning | LOT | Cook, Grundy, Kankakee, LaSalle, Livingston, Will | 8 hr |
| Apr 4, 3:21 AM CDT | Areal Flood Warning | ILX | Woodford | 7 hr |
| Apr 18, 1:54 AM CDT | Areal Flood Warning | LOT | Boone, Lake, McHenry | 6 hr |
| Apr 18, 2:20 PM CDT | Areal Flood Warning | LOT | Lake, McHenry | 13 days |
| Apr 27, 11:43 PM CDT | Areal Flood Warning | LSX | Macoupin | 4 hr |
| Apr 28, 12:16 AM CDT | Areal Flood Warning | LSX | Montgomery | 6 hr |
| Apr 28, 1:50 AM CDT | Areal Flood Warning | LSX | Fayette | 6 hr |
| Apr 28, 7:40 AM CDT | Areal Flood Warning | LSX | Fayette | 12 hr |
| May 18, 5:50 PM CDT | Areal Flood Warning | ILX | Clay, Effingham, Jasper | 15 hr |
| Jun 7, 1:32 AM CDT | Areal Flood Warning | ILX | Vermilion | 6 hr |
| Jun 7, 7:19 AM CDT | Areal Flood Warning | ILX | Vermilion | 6 hr |
| Jun 7, 1:01 PM CDT | Areal Flood Warning | ILX | Vermilion | 10 hr |
| Jun 8, 6:02 PM CDT | Areal Flood Warning | LSX | Madison | 3 hr |
| Jun 14, 2:30 AM CDT | Areal Flood Warning | LOT | Cook, Will | 13 hr |
| Jun 21, 7:51 PM CDT | Areal Flood Warning | ILX | Clay, Crawford, Effingham, Jasper, Lawrence, Richland | 12 hr |
| Jun 22, 12:29 AM CDT | Areal Flood Warning | LOT | Cook | 6 hr |
| Jun 24, 10:43 PM CDT | Areal Flood Warning | LOT | Cook | 6 hr |
| Jul 3, 2:04 AM CDT | Areal Flood Warning | LOT | DeKalb, DuPage, Kane, Kendall, Will | 6 hr |
| Jul 3, 7:59 AM CDT | Areal Flood Warning | LOT | Cook, DuPage | 10 hr |
| Jul 4, 12:38 AM CDT | Areal Flood Warning | LOT | Cook, Will | 11 hr |
| Jul 4, 5:04 PM CDT | Areal Flood Warning | LOT | DeKalb, Kane, LaSalle, Lee | 2 hr |
| Jul 4, 6:48 PM CDT | Areal Flood Warning | LOT | Cook, DeKalb, DuPage, Kane | 14 hr |
| Jul 4, 6:48 PM CDT | Areal Flood Warning | LOT | Cook, DeKalb, Kane, Kendall, LaSalle, Lee and 1 more | 14 hr |
| Jul 4, 6:50 PM CDT | Areal Flood Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 14 hr |
| Jul 11, 3:18 AM CDT | Areal Flood Warning | LSX | Randolph | 3 hr |
| Jul 11, 6:36 AM CDT | Areal Flood Warning | PAH | Hardin, Johnson, Massac, Pope, Union | 8 hr |
| Jul 11, 7:26 AM CDT | Areal Flood Warning | PAH | Franklin, Jackson, Perry, Williamson | 8 hr |
| Jul 11, 7:46 AM CDT | Areal Flood Warning | PAH | Jackson, Union | 6 hr |
| Jul 27, 6:27 AM CDT | Areal Flood Warning | ILX | Effingham | 3 hr |
| Aug 1, 9:09 AM CDT | Areal Flood Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 6 hr |
| Aug 1, 5:44 PM CDT | Areal Flood Warning | LOT | Cook, Will | 6 hr |
| Aug 1, 11:37 PM CDT | Areal Flood Warning | LOT | Cook, Will | 11 hr |
| Aug 10, 2:32 AM CDT | Areal Flood Warning | LOT | Grundy, LaSalle, Livingston | 3 hr |
| Aug 14, 7:13 AM CDT | Areal Flood Warning | LOT | Ford, Iroquois | 15 hr |
| Aug 15, 6:37 AM CDT | Areal Flood Warning | ILX | Fulton, Knox, Mason, Peoria, Tazewell, Woodford | 27 hr |
| Aug 15, 7:33 AM CDT | Areal Flood Warning | ILX | McLean | 65 min |
| Aug 15, 7:40 AM CDT | Areal Flood Warning | ILX | McLean | 26 hr |
| Aug 15, 8:04 AM CDT | Areal Flood Warning | LOT | Ford | 9 hr |
| Aug 15, 12:40 PM CDT | Areal Flood Warning | ILX | McLean | 21 hr |
| Aug 15, 1:40 PM CDT | Areal Flood Warning | ILX | Champaign, Vermilion | 46 hr |
| Sep 20, 10:10 AM CDT | Areal Flood Warning | LOT | Lee | 25 hr |
| Sep 21, 11:03 AM CDT | Areal Flood Warning | LOT | Lee | 8 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County12
- Will County9
- Kane County6
- DuPage County5
- LaSalle County4
- Vermilion County4
- DeKalb County4
- Kendall County4
- Lee County4
- Union County3
- Effingham County3
- McLean County3
- Hardin County2
- Johnson County2
- Massac County2
- Pope County2
- Grundy County2
- Livingston County2
- Woodford County2
- Lake County2
- McHenry County2
- Fayette County2
- Clay County2
- Jasper County2
- Jackson County2
- Ford County2
- Alexander County1
- Pulaski County1
- Kankakee County1
- Boone County1
- Macoupin County1
- Montgomery County1
- Madison County1
- Crawford County1
- Lawrence County1
- Richland County1
- Randolph County1
- Franklin County1
- Perry County1
- Williamson County1
The busiest days
Days with the most alerts issued, by UTC date.
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.