River Flood Watches in Illinois
737 river flood watches since 1986. 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 river flood watches reaches back to 2005.
River Flood Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- River Flood Watches
- 737
- Busiest year
- 2017103 river flood watches
- Average year
- 37over 20 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lake County107
- Rock Island County102
- Winnebago County99
- LaSalle County87
- Henderson County66
- Hancock County59
- Whiteside County59
- Henry County56
- Mercer County47
- Iroquois County44
- Cook County30
- Kane County29
- Bureau County26
- Jo Daviess County19
- McDonough County18
- Grundy County16
- Ogle County16
- Kendall County15
- Kankakee County14
- McHenry County14
- Carroll County13
- Putnam County11
- Boone County9
- Stephenson County9
- Will County7
- Lee County5
- Livingston County5
- DeKalb County2
- DuPage County2
- Massac County1
- Pope County1
The latest river flood watches
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 10:20 AM CDT | River Flood Watch | LOT | Bureau, LaSalle, Putnam | 25 hr |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Hancock | 7 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Hancock, Henderson | 6 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Rock Island | 5 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Henderson | 7 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Henderson, Mercer | 6 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Mercer | 6 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Mercer, Rock Island | 5 days |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | Rock Island | 4 days |
| Sep 19, 10:06 PM CDT | River Flood Watch | LOT | Will | 23 hr |
| Sep 19, 12:27 PM CDT | River Flood Watch | MKX | Lake | 22 hr |
| Sep 19, 12:27 PM CDT | River Flood Watch | MKX | Winnebago | 22 hr |
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. Rebuilt daily.