Alert archive / Illinois / Flash Flood Warnings / 2020
Flash Flood Warnings in Illinois, May 2020
21 flash flood warnings in May 2020. 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in May 2020. Tap one for its archive.
- Flash Flood Warnings
- 21
- Busiest day
- May 15, 20206 flash flood warnings
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 |
|---|---|---|---|---|
| May 14, 9:14 PM CDT | Flash Flood Warning | LOT | Grundy, Kankakee, LaSalle, Livingston | 6 hr |
| May 14, 10:11 PM CDT | Flash Flood Warning | LOT | Kankakee | 5 hr |
| May 14, 11:09 PM CDT | Flash Flood Warning | LOT | Cook | 5 hr |
| May 15, 12:07 AM CDT | Flash Flood Warning | DVN | Henderson, McDonough, Warren | 6 hr |
| May 15, 12:11 AM CDT | Flash Flood Warning | LOT | Cook, DeKalb, DuPage, Kane, Kendall, Lake and 2 more | 4 hr |
| May 15, 12:45 AM CDT | Flash Flood Warning | LOT | Lake | 4 hr |
| May 16, 2:30 PM CDT | Flash Flood Warning | LSX | Greene | 6 hr |
| May 16, 2:45 PM CDT | Flash Flood Warning | ILX | Morgan, Scott | 4 hr |
| May 16, 3:50 PM CDT | Flash Flood Warning | ILX | Morgan, Sangamon | 4 hr |
| May 17, 2:02 AM CDT | Flash Flood Warning | LSX | Jersey, Madison | 5 hr |
| May 17, 4:32 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Ford, Grundy, Iroquois, Kane and 7 more | 6 hr |
| May 17, 6:48 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Kankakee, Lake, Will | 3 hr |
| May 23, 4:53 PM CDT | Flash Flood Warning | LOT | Cook | 6 hr |
| May 24, 9:31 PM CDT | Flash Flood Warning | PAH | Jackson, Union | 3 hr |
| May 25, 3:01 PM CDT | Flash Flood Warning | DVN | Bureau, Putnam | 3 hr |
| May 25, 5:27 PM CDT | Flash Flood Warning | ILX | Woodford | 4 hr |
| May 25, 8:41 PM CDT | Flash Flood Warning | ILX | Peoria, Tazewell, Woodford | 4 hr |
| May 25, 9:11 PM CDT | Flash Flood Warning | ILX | Marshall, Peoria, Tazewell, Woodford | 4 hr |
| May 28, 3:53 PM CDT | Flash Flood Warning | LSX | Pike | 3 hr |
| May 28, 4:18 PM CDT | Flash Flood Warning | DVN | Carroll, Whiteside | 4 hr |
| May 28, 6:03 PM CDT | Flash Flood Warning | ILX | Marshall | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County5
- Kankakee County4
- Lake County4
- DuPage County3
- Will County3
- Woodford County3
- Grundy County2
- LaSalle County2
- Livingston County2
- Kane County2
- Kendall County2
- McHenry County2
- Morgan County2
- Peoria County2
- Tazewell County2
- Marshall County2
- Henderson County1
- McDonough County1
- Warren County1
- DeKalb County1
- Greene County1
- Scott County1
- Sangamon County1
- Jersey County1
- Madison County1
- Ford County1
- Iroquois County1
- Jackson County1
- Union County1
- Bureau County1
- Putnam County1
- Pike County1
- Carroll County1
- Whiteside County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.