Alert archive / Illinois / Flash Flood Watches / 2018
Flash Flood Watches in Illinois, September 2018
11 flash flood watches in September 2018. 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 watches reaches back to 2005.
Flash Flood Watches by county
Each county as a circle sized by its count in September 2018. Tap one for its archive.
- Flash Flood Watches
- 11
- Busiest day
- September 6, 20184 flash 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 |
|---|---|---|---|---|
| Sep 1, 3:44 AM CDT | Flash Flood Watch | DVN | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 24 hr |
| Sep 1, 3:07 PM CDT | Flash Flood Watch | LOT | Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more | 13 hr |
| Sep 2, 9:26 AM CDT | Flash Flood Watch | DVN | Carroll, Jo Daviess, Mercer, Rock Island, Stephenson, Whiteside | 39 hr |
| Sep 2, 2:38 PM CDT | Flash Flood Watch | LOT | Boone, Lake, McHenry, Ogle, Winnebago | 16 hr |
| Sep 3, 12:58 PM CDT | Flash Flood Watch | LOT | Boone, DeKalb, Kane, Lake, Lee, McHenry and 2 more | 11 hr |
| Sep 4, 3:56 AM CDT | Flash Flood Watch | DVN | Carroll, Henry, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more | 39 hr |
| Sep 6, 3:21 AM CDT | Flash Flood Watch | LSX | Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more | 60 hr |
| Sep 6, 2:38 PM CDT | Flash Flood Watch | DVN | Hancock, Henderson, McDonough, Warren | 36 hr |
| Sep 6, 3:21 PM CDT | Flash Flood Watch | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 27 more | 51 hr |
| Sep 6, 3:33 PM CDT | Flash Flood Watch | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 53 hr |
| Sep 7, 2:40 PM CDT | Flash Flood Watch | LOT | Ford, Iroquois | 24 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Carroll County3
- Jo Daviess County3
- Mercer County3
- Rock Island County3
- Stephenson County3
- Whiteside County3
- Boone County3
- Lake County3
- McHenry County3
- Ogle County3
- Winnebago County3
- Henry County2
- DeKalb County2
- Kane County2
- Lee County2
- Bureau County1
- Putnam County1
- DuPage County1
- Adams County1
- Bond County1
- Brown County1
- Calhoun County1
- Clinton County1
- Fayette County1
- Greene County1
- Jersey County1
- Macoupin County1
- Madison County1
- Marion County1
- Monroe County1
- Montgomery County1
- Pike County1
- Randolph County1
- Saint Clair County1
- Washington County1
- Hancock County1
- Henderson County1
- McDonough County1
- Warren County1
- Cass County1
53 more counties
- Champaign County1
- Christian County1
- Clark County1
- Clay County1
- Coles County1
- Crawford County1
- Cumberland County1
- DeWitt County1
- Douglas County1
- Edgar County1
- Effingham County1
- Fulton County1
- Jasper County1
- Knox County1
- Lawrence County1
- Logan County1
- McLean County1
- Macon County1
- Mason County1
- Menard County1
- Morgan County1
- Moultrie County1
- Peoria County1
- Piatt County1
- Richland County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Shelby County1
- Stark County1
- Tazewell County1
- Vermilion County1
- Alexander County1
- Edwards County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Hardin County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Massac County1
- Perry County1
- Pope County1
- Pulaski County1
- Saline County1
- Union County1
- Wabash County1
- Wayne County1
- White County1
- Williamson County1
- Ford County1
- Iroquois County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.