Alert archive / Illinois / Flash Flood Warnings

Flash Flood Warnings in Illinois, 2020

140 flash flood warnings in 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 2020. Tap one for its archive.

Flash Flood Warnings
140
Busiest month
June54 flash flood warnings
Busiest day
June 30, 202022 flash flood warnings

Over time

By month

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.

IssuedProductOfficeCountiesLasted
Jan 11, 2:01 AM CSTFlash Flood WarningPAHJackson, Perry9 hr
Jan 11, 3:09 AM CSTFlash Flood WarningPAHUnion8 hr
Jan 11, 3:39 AM CSTFlash Flood WarningPAHEdwards, Wabash, White6 hr
Jan 11, 3:48 AM CSTFlash Flood WarningPAHHardin, Massac, Pope6 hr
Feb 12, 3:37 PM CSTFlash Flood WarningPAHMassac4 hr
Mar 2, 10:00 PM CSTFlash Flood WarningPAHHardin, Johnson, Pope, Union6 hr
Mar 12, 2:42 PM CDTFlash Flood WarningPAHFranklin73 min
Mar 19, 3:53 PM CDTFlash Flood WarningPAHJefferson, Perry3 hr
Mar 19, 4:17 PM CDTFlash Flood WarningPAHEdwards, Wabash, Wayne14 hr
Mar 19, 5:27 PM CDTFlash Flood WarningPAHWhite91 min
Mar 20, 12:38 AM CDTFlash Flood WarningPAHHamilton, White6 hr
Mar 27, 4:11 AM CDTFlash Flood WarningLSXFayette3 hr
Mar 27, 11:51 PM CDTFlash Flood WarningDVNHenry, Mercer, Rock Island, Whiteside4 hr
Apr 8, 8:13 PM CDTFlash Flood WarningPAHAlexander, Union3 hr
Apr 28, 7:24 PM CDTFlash Flood WarningILXChristian, DeWitt, Logan, Macon, Sangamon100 min
May 14, 9:14 PM CDTFlash Flood WarningLOTGrundy, Kankakee, LaSalle, Livingston6 hr
May 14, 10:11 PM CDTFlash Flood WarningLOTKankakee5 hr
May 14, 11:09 PM CDTFlash Flood WarningLOTCook5 hr
May 15, 12:07 AM CDTFlash Flood WarningDVNHenderson, McDonough, Warren6 hr
May 15, 12:11 AM CDTFlash Flood WarningLOTCook, DeKalb, DuPage, Kane, Kendall, Lake and 2 more4 hr
May 15, 12:45 AM CDTFlash Flood WarningLOTLake4 hr
May 16, 2:30 PM CDTFlash Flood WarningLSXGreene6 hr
May 16, 2:45 PM CDTFlash Flood WarningILXMorgan, Scott4 hr
May 16, 3:50 PM CDTFlash Flood WarningILXMorgan, Sangamon4 hr
May 17, 2:02 AM CDTFlash Flood WarningLSXJersey, Madison5 hr
May 17, 4:32 PM CDTFlash Flood WarningLOTCook, DuPage, Ford, Grundy, Iroquois, Kane and 7 more6 hr
May 17, 6:48 PM CDTFlash Flood Warning Considerable damage threatLOTCook, DuPage, Kankakee, Lake, Will3 hr
May 23, 4:53 PM CDTFlash Flood WarningLOTCook6 hr
May 24, 9:31 PM CDTFlash Flood WarningPAHJackson, Union3 hr
May 25, 3:01 PM CDTFlash Flood WarningDVNBureau, Putnam3 hr
May 25, 5:27 PM CDTFlash Flood WarningILXWoodford4 hr
May 25, 8:41 PM CDTFlash Flood WarningILXPeoria, Tazewell, Woodford4 hr
May 25, 9:11 PM CDTFlash Flood WarningILXMarshall, Peoria, Tazewell, Woodford4 hr
May 28, 3:53 PM CDTFlash Flood WarningLSXPike3 hr
May 28, 4:18 PM CDTFlash Flood WarningDVNCarroll, Whiteside4 hr
May 28, 6:03 PM CDTFlash Flood WarningILXMarshall3 hr
Jun 3, 8:21 AM CDTFlash Flood WarningDVNBureau, Putnam2 hr
Jun 3, 7:23 PM CDTFlash Flood WarningDVNRock Island117 min
Jun 3, 8:40 PM CDTFlash Flood WarningILXDouglas, Edgar5 hr
Jun 3, 9:13 PM CDTFlash Flood WarningILXFulton3 hr
Jun 3, 9:57 PM CDTFlash Flood WarningILXColes, Douglas, Edgar5 hr
Jun 3, 10:04 PM CDTFlash Flood WarningILXFulton2 hr
Jun 3, 10:13 PM CDTFlash Flood WarningDVNMcDonough42 min
Jun 4, 12:35 AM CDTFlash Flood WarningILXChampaign, Vermilion3 hr
Jun 4, 10:17 PM CDTFlash Flood WarningDVNRock Island119 min
Jun 21, 4:40 AM CDTFlash Flood WarningLSXSaint Clair5 hr
Jun 21, 2:39 PM CDTFlash Flood WarningILXSchuyler3 hr
Jun 21, 3:24 PM CDTFlash Flood WarningLSXAdams6 hr
Jun 21, 6:28 PM CDTFlash Flood WarningILXWoodford3 hr
Jun 22, 2:15 PM CDTFlash Flood WarningLSXCalhoun, Pike6 hr
Jun 22, 4:26 PM CDTFlash Flood WarningLSXMacoupin, Montgomery6 hr
Jun 22, 4:51 PM CDTFlash Flood WarningLOTCook, DuPage105 min
Jun 22, 5:04 PM CDTFlash Flood WarningDVNHancock, McDonough3 hr
Jun 22, 5:23 PM CDTFlash Flood WarningILXChristian, Macon5 hr
Jun 22, 6:15 PM CDTFlash Flood WarningILXChampaign, Piatt3 hr
Jun 22, 6:24 PM CDTFlash Flood WarningLOTFord, Iroquois3 hr
Jun 22, 6:26 PM CDTFlash Flood WarningILXMarshall, Peoria, Woodford3 hr
Jun 22, 6:50 PM CDTFlash Flood WarningILXColes, Moultrie, Shelby3 hr
Jun 26, 7:12 PM CDTFlash Flood WarningLOTCook, DuPage, Kane3 hr
Jun 27, 3:32 PM CDTFlash Flood WarningLOTIroquois4 hr
Jun 27, 4:29 PM CDTFlash Flood WarningLOTFord, Iroquois, Kankakee3 hr
Jun 27, 9:20 PM CDTFlash Flood WarningLOTLee3 hr
Jun 27, 9:44 PM CDTFlash Flood WarningDVNWhiteside102 min
Jun 27, 9:49 PM CDTFlash Flood WarningILXChampaign, Vermilion3 hr
Jun 28, 1:19 AM CDTFlash Flood WarningPAHJohnson, Pope, Union3 hr
Jun 28, 7:15 AM CDTFlash Flood WarningPAHGallatin, White6 hr
Jun 28, 2:44 PM CDTFlash Flood WarningPAHGallatin, White6 hr
Jun 29, 4:23 PM CDTFlash Flood WarningLOTBoone, McHenry, Winnebago4 hr
Jun 29, 9:22 PM CDTFlash Flood WarningPAHGallatin, White2 hr
Jun 30, 12:21 AM CDTFlash Flood WarningLSXAdams, Pike6 hr
Jun 30, 1:34 AM CDTFlash Flood Warning Considerable damage threatLSXAdams6 hr
Jun 30, 3:35 AM CDTFlash Flood WarningLSXPike6 hr
Jun 30, 4:21 AM CDTFlash Flood WarningLSXMonroe, Saint Clair, Washington6 hr
Jun 30, 4:33 AM CDTFlash Flood WarningLSXAdams6 hr
Jun 30, 4:39 AM CDTFlash Flood WarningPAHJackson, Johnson, Pope, Saline, Union, Williamson6 hr
Jun 30, 5:05 AM CDTFlash Flood WarningPAHHamilton3 hr
Jun 30, 5:15 AM CDTFlash Flood WarningLSXWashington5 hr
Jun 30, 5:44 AM CDTFlash Flood WarningDVNHancock6 hr
Jun 30, 5:50 AM CDTFlash Flood WarningPAHFranklin, Hamilton, Perry4 hr
Jun 30, 6:02 AM CDTFlash Flood WarningLSXAdams6 hr
Jun 30, 6:38 AM CDTFlash Flood WarningDVNHancock6 hr
Jun 30, 10:12 AM CDTFlash Flood WarningLSXFayette6 hr
Jun 30, 11:15 AM CDTFlash Flood WarningPAHWayne112 min
Jun 30, 1:46 PM CDTFlash Flood WarningPAHAlexander, Johnson, Union6 hr
Jun 30, 3:07 PM CDTFlash Flood WarningPAHMassac113 min
Jun 30, 3:15 PM CDTFlash Flood WarningPAHPerry3 hr
Jun 30, 3:35 PM CDTFlash Flood WarningPAHFranklin, Hamilton, White5 hr
Jun 30, 4:49 PM CDTFlash Flood WarningLSXRandolph5 hr
Jun 30, 4:54 PM CDTFlash Flood WarningPAHJackson77 min
Jun 30, 5:50 PM CDTFlash Flood WarningPAHAlexander, Pulaski2 hr
Jul 1, 7:56 AM CDTFlash Flood WarningLSXBrown6 hr
Jul 1, 2:28 PM CDTFlash Flood WarningPAHWilliamson56 min
Jul 8, 4:11 PM CDTFlash Flood WarningPAHWayne2 hr
Jul 9, 4:02 PM CDTFlash Flood WarningILXChampaign3 hr
Jul 9, 4:16 PM CDTFlash Flood WarningDVNJo Daviess3 hr
Jul 9, 5:03 PM CDTFlash Flood Warning Considerable damage threatDVNJo Daviess2 hr
Jul 11, 5:45 PM CDTFlash Flood WarningILXChampaign3 hr
Jul 15, 2:26 PM CDTFlash Flood WarningLSXAdams5 hr
Jul 15, 2:30 PM CDTFlash Flood WarningILXPeoria, Tazewell3 hr
Jul 15, 3:15 PM CDTFlash Flood WarningILXTazewell, Woodford4 hr
Jul 15, 4:11 PM CDTFlash Flood WarningILXWoodford4 hr
Jul 15, 5:17 PM CDTFlash Flood WarningILXFulton, Mason, Peoria, Tazewell5 hr
Jul 15, 6:19 PM CDTFlash Flood WarningILXLogan, McLean, Tazewell, Woodford4 hr
Jul 15, 6:52 PM CDTFlash Flood WarningILXMcLean, Peoria, Tazewell, Woodford7 hr
Jul 15, 7:19 PM CDTFlash Flood WarningLOTLivingston3 hr
Jul 15, 7:46 PM CDTFlash Flood WarningILXMcLean, Woodford5 hr
Jul 15, 7:52 PM CDTFlash Flood WarningPAHPerry6 hr
Jul 15, 10:20 PM CDTFlash Flood WarningPAHWayne4 hr
Jul 15, 11:10 PM CDTFlash Flood WarningPAHEdwards94 min
Jul 17, 3:15 PM CDTFlash Flood WarningPAHJackson, Johnson, Union, Williamson3 hr
Jul 17, 4:04 PM CDTFlash Flood WarningPAHJackson, Union2 hr
Jul 19, 10:05 AM CDTFlash Flood WarningILXMarshall, Tazewell, Woodford3 hr
Jul 19, 5:10 PM CDTFlash Flood WarningILXEdgar3 hr
Jul 19, 8:17 PM CDTFlash Flood WarningILXClark, Edgar6 hr
Jul 19, 8:34 PM CDTFlash Flood WarningLSXMadison, Saint Clair6 hr
Jul 19, 8:51 PM CDTFlash Flood WarningILXClay, Crawford, Effingham, Jasper6 hr
Jul 19, 9:03 PM CDTFlash Flood WarningLSXBond, Clinton, Fayette, Marion6 hr
Jul 20, 2:59 PM CDTFlash Flood WarningPAHMassac, Pope, Pulaski4 hr
Jul 22, 2:59 PM CDTFlash Flood WarningPAHJackson3 hr
Jul 30, 6:49 AM CDTFlash Flood WarningLSXMadison5 hr
Jul 31, 5:21 PM CDTFlash Flood WarningPAHHardin3 hr
Jul 31, 5:40 PM CDTFlash Flood WarningPAHGallatin3 hr
Jul 31, 6:24 PM CDTFlash Flood WarningPAHHamilton, Saline2 hr
Aug 9, 12:01 AM CDTFlash Flood WarningLSXCalhoun6 hr
Aug 9, 2:41 AM CDTFlash Flood WarningLSXMadison, Monroe, Saint Clair6 hr
Aug 9, 10:06 AM CDTFlash Flood WarningLSXMadison4 hr
Aug 9, 10:23 AM CDTFlash Flood WarningLSXSaint Clair4 hr
Aug 12, 9:41 AM CDTFlash Flood WarningLSXMadison, Saint Clair5 hr
Aug 12, 10:19 AM CDTFlash Flood WarningLSXMadison, Saint Clair4 hr
Aug 12, 11:18 AM CDTFlash Flood WarningLSXMonroe, Randolph, Saint Clair3 hr
Aug 12, 11:42 AM CDTFlash Flood WarningPAHJackson3 hr
Aug 12, 11:47 AM CDTFlash Flood WarningLSXClinton, Randolph, Saint Clair, Washington6 hr
Aug 12, 12:06 PM CDTFlash Flood WarningPAHPerry3 hr
Aug 13, 12:17 PM CDTFlash Flood WarningLSXMonroe, Randolph, Saint Clair6 hr
Aug 13, 1:24 PM CDTFlash Flood WarningPAHFranklin2 hr
Aug 15, 9:19 PM CDTFlash Flood WarningLSXMonroe, Saint Clair3 hr
Aug 25, 3:32 PM CDTFlash Flood Warning Considerable damage threatLOTBoone, DeKalb, Ogle, Winnebago3 min
Sep 7, 10:47 PM CDTFlash Flood WarningILXMcLean2 hr
Sep 8, 2:19 AM CDTFlash Flood WarningILXPeoria, Tazewell3 hr
Sep 8, 3:14 AM CDTFlash Flood WarningILXWoodford3 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

54 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 30, 202022flash flood warnings
  2. June 22, 20209flash flood warnings
  3. June 4, 20207flash flood warnings
  4. July 15, 20207flash flood warnings
  5. May 15, 20206flash flood warnings
  6. June 28, 20206flash flood warnings
  7. August 12, 20206flash flood warnings
  8. July 16, 20205flash flood warnings
  9. July 20, 20205flash flood warnings
  10. January 11, 20204flash flood warnings
  11. June 21, 20204flash flood warnings
  12. August 9, 20204flash flood warnings

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.