Alert archive / Illinois / Flash Flood Watches

Flash Flood Watches in Illinois, 2018

34 flash flood watches in 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 2018. Tap one for its archive.

Flash Flood Watches
34
Busiest month
September11 flash flood watches
Busiest day
September 6, 20184 flash flood watches

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
May 2, 8:51 PM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more11 hr
May 12, 12:34 PM CDTFlash Flood WatchLOTDeKalb, DuPage, Grundy, Kane, Kendall, LaSalle and 2 more15 hr
May 28, 1:58 PM CDTFlash Flood WatchPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more45 hr
Jun 9, 3:01 PM CDTFlash Flood WatchDVNBureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more16 hr
Jun 9, 3:29 PM CDTFlash Flood WatchLOTLaSalle, Lee, Ogle, Winnebago19 hr
Jun 10, 7:30 PM CDTFlash Flood WatchILXCass, Christian, Clark, Clay, Coles, Crawford and 13 more14 hr
Jun 11, 2:57 PM CDTFlash Flood WatchILXCass, Christian, Clark, Clay, Coles, Crawford and 13 more21 hr
Jun 12, 7:08 AM CDTFlash Flood WatchPAHEdwards, Wabash, Wayne, White13 hr
Jun 12, 2:59 PM CDTFlash Flood WatchILXClay, Crawford, Effingham, Jasper, Lawrence, Richland5 hr
Jun 21, 3:28 AM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Grundy, Kane, Kendall and 6 more34 hr
Jun 21, 3:47 AM CDTFlash Flood WatchDVNBureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more23 hr
Jun 26, 2:46 AM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Kane, Kendall, Lake and 5 more22 hr
Jun 26, 3:18 AM CDTFlash Flood WatchDVNBureau, Carroll, Henry, Jo Daviess, Putnam, Stephenson and 1 more18 hr
Jun 30, 10:06 PM CDTFlash Flood WatchDVNCarroll, Jo Daviess, Stephenson5 hr
Aug 28, 9:08 AM CDTFlash Flood WatchDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more20 hr
Aug 28, 8:04 PM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Grundy, Kane, Kendall and 6 more8 hr
Sep 1, 3:44 AM CDTFlash Flood WatchDVNBureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more24 hr
Sep 1, 3:07 PM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Kane, Lake, Lee and 3 more13 hr
Sep 2, 9:26 AM CDTFlash Flood WatchDVNCarroll, Jo Daviess, Mercer, Rock Island, Stephenson, Whiteside39 hr
Sep 2, 2:38 PM CDTFlash Flood WatchLOTBoone, Lake, McHenry, Ogle, Winnebago16 hr
Sep 3, 12:58 PM CDTFlash Flood WatchLOTBoone, DeKalb, Kane, Lake, Lee, McHenry and 2 more11 hr
Sep 4, 3:56 AM CDTFlash Flood WatchDVNCarroll, Henry, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more39 hr
Sep 6, 3:21 AM CDTFlash Flood WatchLSXAdams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more60 hr
Sep 6, 2:38 PM CDTFlash Flood WatchDVNHancock, Henderson, McDonough, Warren36 hr
Sep 6, 3:21 PM CDTFlash Flood WatchILXCass, Champaign, Christian, Clark, Clay, Coles and 27 more51 hr
Sep 6, 3:33 PM CDTFlash Flood WatchPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more53 hr
Sep 7, 2:40 PM CDTFlash Flood WatchLOTFord, Iroquois24 hr
Oct 4, 1:18 PM CDTFlash Flood WatchDVNBureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more48 hr
Oct 4, 3:16 PM CDTFlash Flood WatchLOTBoone, DeKalb, DuPage, Kane, Kendall, Lake and 5 more42 hr
Oct 7, 2:40 PM CDTFlash Flood WatchLOTBoone, DeKalb, LaSalle, Lee, Ogle, Winnebago13 hr
Oct 7, 2:44 PM CDTFlash Flood WatchDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more70 hr
Oct 7, 3:04 PM CDTFlash Flood WatchILXFulton, Knox, Marshall, Mason, Peoria, Schuyler and 3 more12 hr
Oct 9, 3:42 AM CDTFlash Flood WatchDVNBureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more33 hr
Dec 31, 10:16 AM CSTFlash Flood WatchILXSangamon43 hr

By county

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

60 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. September 6, 20184flash flood watches
  2. October 7, 20183flash flood watches
  3. June 9, 20182flash flood watches
  4. June 11, 20182flash flood watches
  5. June 12, 20182flash flood watches
  6. June 21, 20182flash flood watches
  7. June 26, 20182flash flood watches
  8. September 1, 20182flash flood watches
  9. September 2, 20182flash flood watches
  10. October 4, 20182flash flood watches
  11. May 3, 20181flash flood watches
  12. May 12, 20181flash flood watches

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. Rebuilt daily.