Alert archive / Illinois / Flood Watches
Flood Watches in Illinois, 2026
62 flood watches 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 flood watches reaches back to 2005.
Flood Watches by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Flood Watches
- 62
- Busiest month
- June21 flood watches
- Busiest day
- April 17, 20264 flood watches
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 4, 1:48 PM CST | Flood Watch | PAH | Edwards, Franklin, Gallatin, Hamilton, Jackson, Jefferson and 6 more | 21 hr |
| Mar 4, 2:10 PM CST | Flood Watch | ILX | Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more | 19 hr |
| Mar 10, 12:04 PM CDT | Flood Watch | LOT | Cook, DuPage, Grundy, Kane, Kankakee, Kendall and 2 more | 13 hr |
| Apr 3, 3:56 PM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 18 hr |
| Apr 3, 8:58 PM CDT | Flood Watch | ILX | Fulton, Knox, McLean, Marshall, Mason, Peoria and 3 more | 8 hr |
| Apr 14, 7:11 PM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 10 more | 30 hr |
| Apr 15, 2:50 AM CDT | Flood Watch | DVN | Carroll, Jo Daviess, Stephenson | 20 hr |
| Apr 17, 7:57 AM CDT | Flood Watch | LSX | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 2 more | 19 hr |
| Apr 17, 11:48 AM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 15 hr |
| Apr 17, 12:46 PM CDT | Flood Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 12 hr |
| Apr 17, 1:04 PM CDT | Flood Watch | ILX | Cass, Champaign, Christian, Coles, DeWitt, Douglas and 21 more | 15 hr |
| Apr 27, 11:18 AM CDT | Flood Watch | LSX | Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 7 more | 10 hr |
| Apr 27, 11:42 AM CDT | Flood Watch | ILX | Christian, Clark, Clay, Coles, Crawford, Cumberland and 9 more | 11 hr |
| May 18, 1:12 AM CDT | Flood Watch | LSX | Bond, Calhoun, Clinton, Fayette, Jersey, Madison and 4 more | 35 hr |
| May 18, 11:24 AM CDT | Flood Watch | ILX | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 7 more | 11 hr |
| May 19, 11:35 AM CDT | Flood Watch | PAH | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 5 more | 18 hr |
| Jun 7, 11:46 AM CDT | Flood Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 31 hr |
| Jun 7, 1:26 PM CDT | Flood Watch | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 40 hr |
| Jun 8, 1:23 AM CDT | Flood Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 44 hr |
| Jun 8, 1:37 AM CDT | Flood Watch | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 23 hr |
| Jun 10, 10:44 AM CDT | Flood Watch | LSX | Adams, Brown, Pike | 16 hr |
| Jun 10, 10:58 AM CDT | Flood Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 32 hr |
| Jun 10, 11:05 AM CDT | Flood Watch | ILX | Cass, DeWitt, Fulton, Knox, Logan, McLean and 11 more | 17 hr |
| Jun 10, 6:54 PM CDT | Flood Watch | LOT | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 7 more | 7 hr |
| Jun 11, 10:05 AM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 11 hr |
| Jun 11, 11:39 AM CDT | Flood Watch | ILX | Cass, DeWitt, Fulton, Knox, Logan, McLean and 8 more | 9 hr |
| Jun 11, 11:50 AM CDT | Flood Watch | LSX | Adams, Brown | 7 hr |
| Jun 16, 1:10 PM CDT | Flood Watch | ILX | Fulton, Knox, McLean, Marshall, Peoria, Stark and 2 more | 30 hr |
| Jun 16, 1:36 PM CDT | Flood Watch | DVN | Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 4 more | 29 hr |
| Jun 17, 2:20 AM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 15 hr |
| Jun 20, 1:28 AM CDT | Flood Watch | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 45 hr |
| Jun 20, 1:45 AM CDT | Flood Watch | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 45 hr |
| Jun 20, 2:13 AM CDT | Flood Watch | DVN | Hancock, Henderson, McDonough, Warren | 35 hr |
| Jun 20, 9:56 PM CDT | Flood Watch | PAH | Edwards, Franklin, Hamilton, Jefferson, Perry, Wabash and 2 more | 33 hr |
| Jun 24, 11:53 AM CDT | Flood Watch | LSX | Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 9 more | 62 hr |
| Jun 24, 11:58 AM CDT | Flood Watch | ILX | Christian, Clark, Clay, Coles, Crawford, Cumberland and 12 more | 63 hr |
| Jun 25, 1:36 AM CDT | Flood Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 3 days |
| Jul 2, 12:37 PM CDT | Flood Watch | DVN | Bureau, Henry, Mercer, Putnam, Rock Island, Whiteside | 55 hr |
| Jul 3, 8:32 PM CDT | Flood Watch | LOT | Cook, DeKalb, DuPage, Grundy, Kane, Kendall and 3 more | 4 hr |
| Jul 4, 9:39 AM CDT | Flood Watch | LOT | Cook, DeKalb, DuPage, Grundy, Kane, Kendall and 3 more | 10 hr |
| Jul 8, 10:34 AM CDT | Flood Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 4 days |
| Jul 9, 11:03 AM CDT | Flood Watch | LSX | Monroe, Randolph | 56 hr |
| Aug 1, 10:11 AM CDT | Flood Watch | ILX | Champaign, Douglas, Edgar, Vermilion | 11 hr |
| Aug 1, 10:22 AM CDT | Flood Watch | LOT | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 3 more | 11 hr |
| Aug 5, 1:57 AM CDT | Flood Watch | LSX | Adams, Brown, Calhoun, Greene, Jersey, Madison and 3 more | 35 hr |
| Aug 5, 2:03 AM CDT | Flood Watch | DVN | Hancock, Henderson, McDonough, Mercer, Warren | 16 hr |
| Aug 9, 5:03 PM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 10 hr |
| Aug 13, 2:02 AM CDT | Flood Watch | ILX | Champaign, Clark, Coles, Cumberland, DeWitt, Douglas and 13 more | 36 hr |
| Aug 13, 2:08 AM CDT | Flood Watch | LOT | DeKalb, Ford, Grundy, Iroquois, Kankakee, Kendall and 5 more | 32 hr |
| Aug 13, 2:22 AM CDT | Flood Watch | DVN | Bureau, Carroll, Hancock, Henderson, Henry, McDonough and 5 more | 56 hr |
| Aug 14, 12:01 PM CDT | Flood Watch | LOT | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 8 more | 22 hr |
| Aug 14, 12:15 PM CDT | Flood Watch | ILX | Champaign, DeWitt, Douglas, Edgar, Fulton, Knox and 10 more | 22 hr |
| Aug 14, 9:48 PM CDT | Flood Watch | LSX | Adams, Brown | 12 hr |
| Aug 15, 6:39 PM CDT | Flood Watch | LOT | Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 3 more | 13 hr |
| Aug 15, 7:12 PM CDT | Flood Watch | ILX | Champaign, DeWitt, Fulton, Knox, McLean, Marshall and 6 more | 13 hr |
| Aug 19, 2:35 AM CDT | Flood Watch | ILX | Champaign, DeWitt, Fulton, Knox, Logan, McLean and 10 more | 22 hr |
| Aug 19, 2:56 AM CDT | Flood Watch | LOT | Ford, Iroquois, Livingston | 22 hr |
| Aug 19, 8:23 PM CDT | Flood Watch | PAH | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 11 hr |
| Sep 16, 12:32 PM CDT | Flood Watch | DVN | Bureau, Carroll, Henderson, Henry, Mercer, Putnam and 3 more | 20 hr |
| Sep 16, 12:39 PM CDT | Flood Watch | ILX | Knox, Marshall, Stark | 16 hr |
| Sep 18, 1:23 AM CDT | Flood Watch | DVN | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 60 hr |
| Sep 18, 1:47 PM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 9 more | 47 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Grundy County15
- Kendall County15
- Will County15
- Cook County14
- LaSalle County14
- DuPage County13
- Kankakee County13
- Kane County12
- DeKalb County12
- Livingston County12
- Knox County12
- Marshall County12
- Stark County12
- Ford County11
- Iroquois County11
- Lee County11
- McLean County11
- Peoria County11
- Tazewell County11
- Woodford County11
- Fulton County10
- Ogle County9
- Mercer County9
- DeWitt County9
- Douglas County9
- Edgar County9
- Lake County8
- Mason County8
- Bureau County8
- Henderson County8
- Henry County8
- Putnam County8
- Rock Island County8
- Warren County8
- Whiteside County8
- Champaign County8
- Vermilion County8
- Clark County7
- Cumberland County7
- Boone County7
62 more counties
- McHenry County7
- Winnebago County7
- Carroll County7
- Adams County7
- Brown County7
- Calhoun County7
- Jersey County7
- Hancock County7
- McDonough County7
- Coles County7
- Logan County7
- Macon County7
- Moultrie County7
- Piatt County7
- Monroe County7
- Gallatin County6
- Saline County6
- White County6
- Williamson County6
- Clay County6
- Crawford County6
- Effingham County6
- Jasper County6
- Lawrence County6
- Richland County6
- Greene County6
- Pike County6
- Menard County6
- Schuyler County6
- Shelby County6
- Madison County6
- Saint Clair County6
- Edwards County5
- Franklin County5
- Hamilton County5
- Jackson County5
- Jefferson County5
- Perry County5
- Wabash County5
- Wayne County5
- Jo Daviess County5
- Stephenson County5
- Macoupin County5
- Montgomery County5
- Cass County5
- Christian County5
- Morgan County5
- Sangamon County5
- Scott County5
- Bond County5
- Clinton County5
- Fayette County5
- Marion County5
- Washington County5
- Alexander County5
- Hardin County5
- Johnson County5
- Massac County5
- Pope County5
- Pulaski County5
- Union County5
- Randolph County4
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.