Alert archive / Illinois / Flood Watches / 2026
Flood Watches in Illinois, April 2026
10 flood watches in April 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 April 2026. Tap one for its archive.
- Flood Watches
- 10
- Busiest day
- April 17, 20264 flood watches
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| 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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Boone County3
- Cook County3
- DeKalb County3
- DuPage County3
- Grundy County3
- Kane County3
- Kankakee County3
- Kendall County3
- Lake County3
- LaSalle County3
- Lee County3
- Livingston County3
- McHenry County3
- Ogle County3
- Will County3
- Winnebago County3
- Ford County2
- Iroquois County2
- Fulton County2
- Knox County2
- McLean County2
- Marshall County2
- Mason County2
- Peoria County2
- Stark County2
- Tazewell County2
- Woodford County2
- Carroll County2
- Jo Daviess County2
- Stephenson County2
- Calhoun County2
- Greene County2
- Jersey County2
- Macoupin County2
- Montgomery County2
- Christian County2
- Coles County2
- Douglas County2
- Edgar County2
- Macon County2
42 more counties
- Moultrie County2
- Shelby County2
- Adams County1
- Brown County1
- Pike County1
- Bureau County1
- Hancock County1
- Henderson County1
- Henry County1
- McDonough County1
- Mercer County1
- Putnam County1
- Rock Island County1
- Warren County1
- Whiteside County1
- Cass County1
- Champaign County1
- DeWitt County1
- Logan County1
- Menard County1
- Morgan County1
- Piatt County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Vermilion County1
- Bond County1
- Clinton County1
- Fayette County1
- Madison County1
- Marion County1
- Monroe County1
- Saint Clair County1
- Washington County1
- Clark County1
- Clay County1
- Crawford County1
- Cumberland County1
- Effingham County1
- Jasper County1
- Lawrence County1
- Richland County1
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.