Alert archive / Illinois / 2020

Weather alerts in Illinois, September 2020

77 weather alerts in September 2020, 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 2020. Tap one for its archive.

Alerts
77
Warnings
13
Watches
4
Advisories
24
Busiest day
September 6, 202023 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
Sep 1, 4:35 AM CDTDense Fog AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 19 more4 hr
Sep 2, 1:51 PM CDTFlash Flood WatchPAHAlexander, Hardin, Massac, Pope, Pulaski17 hr
Sep 2, 3:06 PM CDTSmall Craft AdvisoryLOT51 hr
Sep 3, 2:58 AM CDTDense Fog AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 19 more6 hr
Sep 3, 3:15 AM CDTDense Fog AdvisoryLSXBond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more6 hr
Sep 5, 3:07 AM CDTSmall Craft AdvisoryLOT19 hr
Sep 5, 3:25 AM CDTBeach Hazards StatementLOTCook19 hr
Sep 5, 3:32 PM CDTBeach Hazards StatementLOTLake30 hr
Sep 5, 3:39 PM CDTGale WarningLOT36 hr
Sep 6, 1:57 AM CDTSevere Thunderstorm WarningDVNCarroll, Jo Daviess, Stephenson29 min
Sep 6, 2:32 AM CDTMesoscale DiscussionSPCCarroll, Henderson, Henry, Jo Daviess, Knox, Lee and 4 more88 min
Sep 6, 2:53 AM CDTSevere Thunderstorm WatchSPCBureau, Carroll, DeWitt, Henry, Jo Daviess, Knox and 16 more6 hr
Sep 6, 4:04 AM CDTSevere Thunderstorm WarningDVNRock Island, Whiteside41 min
Sep 6, 4:14 AM CDTSpecial Weather StatementLOTDeKalb46 min
Sep 6, 4:40 AM CDTSevere Thunderstorm WarningDVNBureau, Henry, Rock Island, Whiteside65 min
Sep 6, 5:14 AM CDTSpecial Weather StatementDVNRock Island31 min
Sep 6, 5:26 AM CDTSpecial Weather StatementILXMarshall, Stark49 min
Sep 6, 5:30 AM CDTMesoscale DiscussionSPCBureau, Carroll, Henry, Jo Daviess, Knox, Mercer and 5 more90 min
Sep 6, 5:41 AM CDTSevere Thunderstorm WarningILXKnox, Marshall, Stark49 min
Sep 6, 5:44 AM CDTSevere Thunderstorm WarningDVNBureau, Henry31 min
Sep 6, 6:31 AM CDTSpecial Weather StatementILXKnox, Marshall, Stark44 min
Sep 6, 7:06 AM CDTSpecial Weather StatementLOTLivingston39 min
Sep 6, 7:14 AM CDTSpecial Weather StatementILXKnox, Marshall, Peoria, Stark, Woodford46 min
Sep 6, 7:19 AM CDTSpecial Weather StatementDVNMercer26 min
Sep 6, 8:10 AM CDTSpecial Weather StatementDVNHenderson, McDonough, Warren50 min
Sep 6, 8:15 AM CDTSpecial Weather StatementILXFulton, Knox, Peoria, Tazewell45 min
Sep 6, 9:01 AM CDTSpecial Weather StatementILXMason44 min
Sep 6, 9:09 AM CDTSevere Thunderstorm WarningILXFulton, Mason, Peoria, Tazewell36 min
Sep 6, 9:50 AM CDTSpecial Weather StatementILXChampaign, Macon, Piatt40 min
Sep 6, 10:28 AM CDTSpecial Weather StatementILXDouglas47 min
Sep 6, 10:54 AM CDTSpecial Weather StatementILXColes, Moultrie51 min
Sep 6, 3:44 PM CDTBeach Hazards StatementLOTCook, Lake6 days
Sep 6, 9:32 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 13 more118 min
Sep 7, 3:52 AM CDTSmall Craft AdvisoryLOT4 days
Sep 7, 3:34 PM CDTLakeshore Flood AdvisoryLOTCook, Lake48 hr
Sep 7, 3:59 PM CDTMesoscale DiscussionSPCColes, Douglas, Edgar, Moultrie2 hr
Sep 7, 7:14 PM CDTMesoscale DiscussionSPCFulton, Hancock, Henderson, McDonough, Warren2 hr
Sep 7, 9:01 PM CDTSpecial Weather StatementDVNHancock44 min
Sep 7, 9:44 PM CDTSpecial Weather StatementDVNMcDonough46 min
Sep 7, 9:58 PM CDTSpecial Weather StatementILXDeWitt62 min
Sep 7, 10:06 PM CDTAreal Flood WarningILXMcLean3 hr
Sep 7, 10:30 PM CDTSpecial Weather StatementDVNMcDonough45 min
Sep 7, 10:47 PM CDTFlash Flood WarningILXMcLean2 hr
Sep 7, 11:42 PM CDTSpecial Weather StatementILXTazewell63 min
Sep 8, 12:32 AM CDTSpecial Weather StatementLOTLake43 min
Sep 8, 1:48 AM CDTSpecial Weather StatementILXWoodford42 min
Sep 8, 2:16 AM CDTSevere Thunderstorm WarningDVNHenderson, Warren44 min
Sep 8, 2:19 AM CDTFlash Flood WarningILXPeoria, Tazewell3 hr
Sep 8, 2:42 AM CDTSpecial Weather StatementILXWoodford33 min
Sep 8, 2:54 AM CDTSpecial Weather StatementDVNWarren36 min
Sep 8, 3:01 AM CDTSpecial Weather StatementILXKnox44 min
Sep 8, 3:14 AM CDTFlash Flood WarningILXWoodford3 hr
Sep 8, 2:16 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey29 min
Sep 8, 3:01 PM CDTMesoscale DiscussionSPCCalhoun, Christian, Greene, Jersey, Macoupin, Madison and 3 more119 min
Sep 8, 3:06 PM CDTSpecial Weather StatementILXPiatt39 min
Sep 8, 3:51 PM CDTSpecial Weather StatementILXChampaign39 min
Sep 8, 5:02 PM CDTSpecial Weather StatementILXMoultrie43 min
Sep 9, 6:41 AM CDTDense Fog AdvisoryILXChampaign, Christian, Coles, Cumberland, Douglas, Effingham and 8 more4 hr
Sep 10, 7:12 AM CDTDense Fog AdvisoryILXClark, Clay, Coles, Crawford, Cumberland, Edgar and 3 more108 min
Sep 11, 2:19 PM CDTFlash Flood WatchLSXAdams, Brown, Pike20 hr
Sep 11, 2:28 PM CDTFlash Flood WatchDVNHancock, Henderson, McDonough, Mercer, Rock Island, Warren15 hr
Sep 11, 2:51 PM CDTSmall Craft AdvisoryLOT24 hr
Sep 12, 6:41 AM CDTDense Fog AdvisoryPAHAlexander, Jackson, Johnson, Massac, Perry, Pulaski and 1 more2 hr
Sep 12, 5:58 PM CDTAreal Flood AdvisoryPAHFranklin, Hamilton, Jackson, Jefferson, Perry, Wayne and 1 more3 hr
Sep 12, 7:31 PM CDTAreal Flood AdvisoryPAHWayne3 hr
Sep 13, 4:51 AM CDTDense Fog AdvisoryPAHAlexander, Hardin, Massac, Pope, Pulaski2 hr
Sep 16, 3:05 AM CDTBeach Hazards StatementLOTCook, Lake66 hr
Sep 16, 3:05 AM CDTSmall Craft AdvisoryLOT66 hr
Sep 16, 3:15 PM CDTLakeshore Flood AdvisoryLOTCook, Lake30 hr
Sep 21, 1:36 AM CDTSmall Craft AdvisoryLOT8 hr
Sep 25, 2:50 PM CDTSmall Craft AdvisoryLOT42 hr
Sep 26, 2:18 AM CDTDense Fog AdvisoryPAHWabash4 hr
Sep 27, 4:01 AM CDTSmall Craft AdvisoryLOT3 hr
Sep 27, 4:01 AM CDTSmall Craft AdvisoryLOT24 hr
Sep 28, 4:04 AM CDTSmall Craft AdvisoryLOT24 hr
Sep 29, 2:51 PM CDTSmall Craft AdvisoryLOT3 days
Sep 30, 9:47 AM CDTLake Wind AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more7 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 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.