Alert archive / Illinois / Flood Watches / 2025
Flood Watches in Illinois, August 2025
6 flood watches in August 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 flood watches reaches back to 2005.
Flood Watches by county
Each county as a circle sized by its count in August 2025. Tap one for its archive.
- Flood Watches
- 6
- Busiest day
- August 8, 20251 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 |
|---|---|---|---|---|
| Aug 8, 2:15 PM CDT | Flood Watch | DVN | Carroll, Hancock, Henderson, Henry, Jo Daviess, Mercer and 4 more | 53 hr |
| Aug 9, 3:00 PM CDT | Flood Watch | LSX | Adams | 23 hr |
| Aug 9, 7:47 PM CDT | Flood Watch | LOT | Boone, Lake, McHenry, Winnebago | 14 hr |
| Aug 12, 11:33 AM CDT | Flood Watch | LOT | Cook, DuPage, Will | 8 hr |
| Aug 16, 9:33 PM CDT | Flood Watch | DVN | Carroll, Jo Daviess, Stephenson | 12 hr |
| Aug 18, 2:21 PM CDT | Flood Watch | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 9 more | 13 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Carroll County2
- Jo Daviess County2
- Stephenson County2
- Boone County2
- Lake County2
- McHenry County2
- Winnebago County2
- Cook County2
- DuPage County2
- Will County2
- Hancock County1
- Henderson County1
- Henry County1
- Mercer County1
- Rock Island County1
- Warren County1
- Whiteside County1
- Adams County1
- DeKalb County1
- Grundy County1
- Kane County1
- Kankakee County1
- Kendall County1
- LaSalle County1
- Lee County1
- Ogle County1
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.