Alert archive / Illinois / 2021

Weather alerts in Illinois, September 2021

91 weather alerts in September 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in September 2021. Tap one for its archive.

Alerts
91
Warnings
32
Watches
4
Advisories
21
Busiest day
September 7, 202138 alerts

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.

IssuedProductOfficeCountiesLasted
Aug 31, 11:37 PM CDTFlash Flood WarningLSXBond, Fayette, Montgomery6 hr
Sep 5, 3:06 AM CDTSmall Craft AdvisoryLOT16 hr
Sep 6, 3:00 AM CDTGale WatchLOT18 hr
Sep 6, 9:29 PM CDTSmall Craft AdvisoryLOT55 hr
Sep 7, 12:25 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 9 more65 min
Sep 7, 12:37 PM CDTSpecial Weather StatementDVNCarroll38 min
Sep 7, 12:37 PM CDTSevere Thunderstorm WarningLOTBoone, McHenry, Winnebago53 min
Sep 7, 12:47 PM CDTSevere Thunderstorm WarningDVNWhiteside29 min
Sep 7, 12:47 PM CDTSpecial Marine WarningLOT118 min
Sep 7, 1:12 PM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Champaign, Cook, DeKalb, DeWitt and 34 more8 hr
Sep 7, 1:13 PM CDTSpecial Weather StatementLOTBoone, DeKalb, Kane, Lee, Ogle32 min
Sep 7, 1:20 PM CDTSevere Thunderstorm WarningLOTLake, McHenry55 min
Sep 7, 1:23 PM CDTSevere Thunderstorm WarningLOTDeKalb, Kane, Lee, Ogle67 min
Sep 7, 1:41 PM CDTSevere Thunderstorm Warning Considerable damage threatLOTCook49 min
Sep 7, 1:51 PM CDTSpecial Marine WarningLOT3 hr
Sep 7, 2:03 PM CDTSevere Thunderstorm Warning Considerable damage threatLOTGrundy, Kendall, LaSalle72 min
Sep 7, 2:15 PM CDTAreal Flood AdvisoryLOTLake, McHenry3 hr
Sep 7, 2:15 PM CDTSevere Thunderstorm WarningLOTLake30 min
Sep 7, 2:20 PM CDTSpecial Weather StatementDVNBureau25 min
Sep 7, 2:29 PM CDTSevere Thunderstorm Warning Destructive damage threatLOTGrundy, Kendall, LaSalle46 min
Sep 7, 2:41 PM CDTSpecial Marine WarningLOT94 min
Sep 7, 2:47 PM CDTSpecial Weather StatementDVNPutnam28 min
Sep 7, 2:55 PM CDTSpecial Weather StatementILXStark20 min
Sep 7, 2:57 PM CDTSevere Thunderstorm Warning Considerable damage threatLOTGrundy, Kankakee, Kendall, LaSalle, Will63 min
Sep 7, 3:04 PM CDTTornado WarningLOTWill26 min
Sep 7, 3:14 PM CDTMesoscale DiscussionSPCDuPage, Ford, Grundy, Iroquois, Kankakee, Kendall and 11 more91 min
Sep 7, 3:28 PM CDTSevere Thunderstorm Warning Considerable damage threatLOTCook, Kankakee, Will62 min
Sep 7, 3:53 PM CDTSevere Thunderstorm WarningILXMarshall, Woodford37 min
Sep 7, 4:06 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Kankakee, LaSalle, Livingston54 min
Sep 7, 4:22 PM CDTSevere Thunderstorm WarningILXMcLean, Woodford38 min
Sep 7, 4:34 PM CDTSpecial Weather StatementLOTKankakee56 min
Sep 7, 4:58 PM CDTSevere Thunderstorm WarningILXMcLean47 min
Sep 7, 4:58 PM CDTSevere Thunderstorm WarningILXMcLean47 min
Sep 7, 4:59 PM CDTSevere Thunderstorm WarningLOTFord, Iroquois, Livingston61 min
Sep 7, 5:21 PM CDTSpecial Weather StatementLOTGrundy39 min
Sep 7, 5:25 PM CDTMesoscale DiscussionSPCChampaign, Vermilion95 min
Sep 7, 5:39 PM CDTSevere Thunderstorm WarningILXChampaign, DeWitt, McLean, Piatt36 min
Sep 7, 5:46 PM CDTSevere Thunderstorm WarningLOTGrundy, Kankakee, Livingston, Will44 min
Sep 7, 6:09 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion51 min
Sep 7, 6:30 PM CDTSpecial Weather StatementILXPiatt45 min
Sep 7, 6:53 PM CDTAreal Flood AdvisoryLOTIroquois, Kankakee3 hr
Sep 7, 7:00 PM CDTSpecial Weather StatementILXDouglas45 min
Sep 7, 7:04 PM CDTSevere Thunderstorm WarningLOTIroquois56 min
Sep 7, 8:08 PM CDTSpecial Weather StatementILXVermilion37 min
Sep 11, 4:03 AM CDTLake Wind AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more14 hr
Sep 13, 2:37 PM CDTSmall Craft AdvisoryLOT37 hr
Sep 14, 3:18 PM CDTMesoscale DiscussionSPCBond, Calhoun, Champaign, Christian, Clinton, Coles and 28 more117 min
Sep 14, 4:19 PM CDTSpecial Weather StatementPAHHamilton41 min
Sep 14, 6:45 PM CDTSevere Thunderstorm WarningLSXSaint Clair30 min
Sep 14, 7:03 PM CDTSpecial Weather StatementILXCumberland27 min
Sep 14, 7:19 PM CDTSpecial Weather StatementILXClay, Jasper56 min
Sep 14, 7:31 PM CDTSevere Thunderstorm WarningILXClay, Effingham, Jasper, Richland44 min
Sep 15, 4:20 AM CDTAreal Flood AdvisoryLSXRandolph3 hr
Sep 17, 11:35 AM CDTAreal Flood AdvisoryPAHAlexander, Pulaski3 hr
Sep 17, 2:50 PM CDTSmall Craft AdvisoryLOT24 hr
Sep 17, 2:53 PM CDTBeach Hazards StatementLOTCook, Lake28 hr
Sep 17, 6:00 PM CDTSpecial Weather StatementLOTKane45 min
Sep 19, 2:55 PM CDTSmall Craft AdvisoryLOT57 hr
Sep 20, 2:39 PM CDTBeach Hazards StatementLOTCook, Lake4 days
Sep 20, 8:52 PM CDTSpecial Weather StatementDVNRock Island23 min
Sep 20, 9:00 PM CDTSpecial Weather StatementDVNHenderson, Warren45 min
Sep 20, 9:24 PM CDTSpecial Weather StatementILXKnox51 min
Sep 20, 9:37 PM CDTSpecial Weather StatementDVNHancock, Henderson, Henry, McDonough, Warren38 min
Sep 20, 10:07 PM CDTSpecial Weather StatementLOTLee38 min
Sep 20, 10:08 PM CDTSpecial Weather StatementILXKnox, Peoria, Stark52 min
Sep 20, 10:34 PM CDTSpecial Weather StatementDVNBureau, Putnam26 min
Sep 20, 10:35 PM CDTSevere Thunderstorm WarningLSXAdams, Pike40 min
Sep 20, 10:39 PM CDTSpecial Weather StatementILXCass, Fulton, Mason, Schuyler51 min
Sep 20, 10:48 PM CDTSpecial Weather StatementLOTLee42 min
Sep 20, 11:16 PM CDTSpecial Weather StatementILXPeoria44 min
Sep 20, 11:30 PM CDTSpecial Weather StatementILXMason, Menard, Tazewell45 min
Sep 20, 11:44 PM CDTSpecial Weather StatementLOTBoone, DeKalb, Kane, Kendall, LaSalle, McHenry31 min
Sep 21, 12:03 AM CDTSpecial Weather StatementILXDeWitt, Logan, McLean57 min
Sep 21, 12:12 AM CDTSpecial Marine WarningLOT2 hr
Sep 21, 3:40 AM CDTLakeshore Flood AdvisoryLOTCook54 hr
Sep 21, 3:44 AM CDTGale WatchLOT11 hr
Sep 21, 3:44 AM CDTSmall Craft AdvisoryLOT20 hr
Sep 21, 3:06 PM CDTGale WarningLOT48 hr
Sep 22, 3:45 AM CDTLake Wind AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more13 hr
Sep 22, 12:19 PM CDTSpecial Marine WarningLOT86 min
Sep 23, 9:04 AM CDTSmall Craft AdvisoryLOT18 hr
Sep 23, 8:59 PM CDTGale WatchLOT6 hr
Sep 24, 3:20 AM CDTGale WarningLOT22 hr
Sep 24, 3:20 AM CDTSmall Craft AdvisoryLOT12 hr
Sep 25, 1:42 AM CDTSmall Craft AdvisoryLOT8 hr
Sep 25, 5:02 AM CDTDense Fog AdvisoryILXCass, Christian, Morgan, Sangamon, Schuyler, Scott4 hr
Sep 25, 5:06 AM CDTDense Fog AdvisoryLSXAdams, Brown, Calhoun, Greene, Jersey, Macoupin and 2 more4 hr
Sep 25, 2:53 PM CDTSmall Craft AdvisoryLOT43 hr
Sep 27, 3:00 AM CDTSmall Craft AdvisoryLOT31 hr
Sep 27, 3:10 AM CDTBeach Hazards StatementLOTCook, Lake34 hr
Sep 27, 4:00 AM CDTLake Wind AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more13 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

By county

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

56 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

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.