Alert archive / Illinois / McLean County

Weather alerts in McLean County, Illinois, 2021

147 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

McLean County and its neighbors

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

Alerts
147
Warnings
52
Watches
12
Advisories
40
Busiest month
June37 alerts
Busiest day
June 26, 202119 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

0 of 7 tornado warnings covering McLean County in 2021 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

McLean County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings70100%10%
Severe thunderstorm warnings241250%1145%21 min
Flash flood warnings10460%1292%105 min

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Lincoln, IL: tornado warnings541572%4751%17 min
NWS Lincoln, IL: severe thunderstorm warnings1304962%21354%22 min
NWS Lincoln, IL: flash flood warnings371462%3284%93 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

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.

IssuedProductOfficeLasted
Jan 1, 1:08 AM CSTMesoscale DiscussionSPC5 hr
Jan 1, 6:35 AM CSTMesoscale DiscussionSPC4 hr
Jan 1, 6:01 PM CSTWinter Weather AdvisoryILX6 hr
Jan 2, 3:49 PM CSTDense Fog AdvisoryILX18 hr
Jan 3, 2:38 PM CSTDense Fog AdvisoryILX32 hr
Jan 5, 3:27 PM CSTDense Fog AdvisoryILX17 hr
Jan 24, 3:06 PM CSTWinter Weather AdvisoryILX21 hr
Jan 25, 11:47 AM CSTWinter Weather AdvisoryILX24 hr
Jan 29, 2:48 PM CSTWinter Weather AdvisoryILX48 hr
Feb 3, 4:03 PM CSTWinter Weather AdvisoryILX38 hr
Feb 5, 2:01 PM CSTWind Chill AdvisoryILX45 hr
Feb 5, 2:01 PM CSTWinter Weather AdvisoryILX33 hr
Feb 13, 3:15 AM CSTWind Chill AdvisoryILX57 hr
Feb 13, 3:10 PM CSTWinter Weather AdvisoryILX60 hr
Feb 13, 8:35 PM CSTWind Chill WarningILX39 hr
Feb 14, 2:38 AM CSTWinter Storm WarningILX48 hr
Feb 15, 2:52 PM CSTMesoscale DiscussionSPC6 hr
Mar 10, 3:08 AM CSTWind AdvisoryILX21 hr
Mar 16, 12:22 AM CDTDense Fog AdvisoryILX10 hr
Mar 17, 3:16 PM CDTWind AdvisoryILX28 hr
Mar 25, 3:03 AM CDTWind AdvisoryILX22 hr
Apr 14, 2:36 PM CDTFrost AdvisoryILX17 hr
Apr 19, 2:27 AM CDTFreeze WatchILX12 hr
Apr 19, 2:27 PM CDTFreeze WarningILX43 hr
Apr 21, 2:58 AM CDTFreeze WarningILX29 hr
May 3, 2:08 PM CDTMesoscale DiscussionSPC67 min
May 3, 2:47 PM CDTSevere Thunderstorm WatchSPC6 hr
May 3, 5:15 PM CDTMesoscale DiscussionSPC90 min
May 7, 2:08 PM CDTFrost AdvisoryILX18 hr
May 9, 2:48 PM CDTFrost AdvisoryILX16 hr
May 11, 2:34 PM CDTFrost AdvisoryILX16 hr
Jun 7, 7:51 PM CDTAreal Flood AdvisoryILX114 min
Jun 12, 1:26 PM CDTMesoscale DiscussionSPC3 hr
Jun 18, 9:20 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 19, 12:52 AM CDTSevere Thunderstorm WarningILX38 min
Jun 19, 1:19 AM CDTSevere Thunderstorm WarningILX41 min
Jun 19, 1:23 AM CDTSevere Thunderstorm WarningILX52 min
Jun 19, 2:10 AM CDTMesoscale DiscussionSPC2 hr
Jun 19, 2:19 AM CDTSevere Thunderstorm WarningILX41 min
Jun 20, 10:57 AM CDTMesoscale DiscussionSPC2 hr
Jun 24, 12:49 PM CDTAreal Flood AdvisoryILX3 hr
Jun 24, 2:28 PM CDTFlash Flood WatchILX54 hr
Jun 25, 4:46 PM CDTMesoscale DiscussionSPC59 min
Jun 25, 5:06 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 25, 7:33 PM CDTSpecial Weather StatementILX42 min
Jun 25, 7:53 PM CDTSevere Thunderstorm WarningILX67 min
Jun 25, 8:29 PM CDTTornado WarningILX30 min
Jun 25, 8:34 PM CDTMesoscale DiscussionSPC86 min
Jun 25, 8:49 PM CDTSevere Thunderstorm WarningILX41 min
Jun 25, 8:54 PM CDTFlash Flood WarningILX6 hr
Jun 25, 9:59 PM CDTFlash Flood WarningILX5 hr
Jun 25, 10:31 PM CDTMesoscale DiscussionSPC59 min
Jun 26, 2:34 AM CDTAreal Flood WarningILX61 hr
Jun 26, 11:45 AM CDTMesoscale DiscussionSPC2 hr
Jun 26, 12:05 PM CDTTornado WatchSPC9 hr
Jun 26, 12:21 PM CDTTornado WarningILX24 min
Jun 26, 2:38 PM CDTTornado WarningILX37 min
Jun 26, 2:47 PM CDTMesoscale DiscussionSPC118 min
Jun 26, 3:12 PM CDTTornado WarningILX33 min
Jun 26, 3:25 PM CDTFlash Flood WarningILX4 hr
Jun 26, 3:37 PM CDTTornado WarningILX23 min
Jun 26, 4:43 PM CDTSevere Thunderstorm WarningILX32 min
Jun 26, 5:16 PM CDTSevere Thunderstorm WarningILX44 min
Jun 27, 11:36 AM CDTMesoscale DiscussionSPC2 hr
Jun 28, 3:13 AM CDTFlash Flood WatchILX40 hr
Jun 28, 12:08 PM CDTMesoscale DiscussionSPC2 hr
Jun 28, 9:49 PM CDTRiver Flood WarningILX12 hr
Jun 29, 5:31 PM CDTSpecial Weather StatementILX44 min
Jul 7, 2:02 PM CDTMesoscale DiscussionSPC88 min
Jul 10, 3:09 PM CDTMesoscale DiscussionSPC96 min
Jul 15, 1:39 PM CDTMesoscale DiscussionSPC2 hr
Jul 15, 4:43 PM CDTAreal Flood AdvisoryILX3 hr
Jul 15, 4:52 PM CDTSevere Thunderstorm WarningILX38 min
Jul 15, 5:01 PM CDTFlash Flood WarningILX3 hr
Jul 16, 7:04 AM CDTFlash Flood WarningILX4 hr
Jul 16, 9:41 AM CDTFlash Flood WarningILX4 hr
Jul 16, 1:35 PM CDTAreal Flood WarningILX24 hr
Jul 24, 3:32 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 24, 5:21 PM CDTMesoscale DiscussionSPC114 min
Jul 24, 7:31 PM CDTMesoscale DiscussionSPC119 min
Jul 27, 2:06 AM CDTHeat AdvisoryILX66 hr
Jul 29, 2:19 PM CDTMesoscale DiscussionSPC116 min
Aug 1, 1:03 AM CDTDense Fog AdvisoryILX7 hr
Aug 6, 3:23 PM CDTMesoscale DiscussionSPC97 min
Aug 8, 2:21 PM CDTSpecial Weather StatementILX24 min
Aug 8, 3:00 PM CDTMesoscale DiscussionSPC2 hr
Aug 8, 3:30 PM CDTSpecial Weather StatementILX30 min
Aug 8, 4:45 PM CDTAreal Flood AdvisoryILX2 hr
Aug 8, 5:14 PM CDTSevere Thunderstorm WarningILX46 min
Aug 8, 5:35 PM CDTFlash Flood WarningILX3 hr
Aug 8, 7:20 PM CDTAreal Flood AdvisoryILX115 min
Aug 9, 1:54 PM CDTHeat AdvisoryILX29 hr
Aug 10, 3:49 PM CDTHeat AdvisoryILX27 hr
Aug 11, 1:20 AM CDTMesoscale DiscussionSPC115 min
Aug 12, 2:59 AM CDTSpecial Weather StatementILX46 min
Aug 12, 3:14 AM CDTSevere Thunderstorm WarningILX31 min
Aug 12, 3:16 AM CDTMesoscale DiscussionSPC119 min
Aug 12, 3:51 AM CDTSpecial Weather StatementILX24 min
Aug 12, 4:26 AM CDTSevere Thunderstorm WarningILX21 min
Aug 12, 8:12 AM CDTSpecial Weather StatementILX48 min
Aug 12, 9:13 AM CDTSevere Thunderstorm WarningILX47 min
Aug 12, 9:24 AM CDTAreal Flood AdvisoryILX3 hr
Aug 12, 10:04 AM CDTFlash Flood WarningILX5 hr
Aug 12, 3:01 PM CDTAreal Flood WarningILX6 hr
Aug 23, 2:53 PM CDTHeat AdvisoryILX5 days
Aug 24, 8:43 PM CDTSevere Thunderstorm WarningILX47 min
Aug 24, 9:10 PM CDTSpecial Weather StatementILX50 min
Aug 25, 4:02 PM CDTMesoscale DiscussionSPC88 min
Aug 29, 1:18 PM CDTMesoscale DiscussionSPC87 min
Sep 7, 1:12 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 7, 3:14 PM CDTMesoscale DiscussionSPC91 min
Sep 7, 4:22 PM CDTSevere Thunderstorm WarningILX38 min
Sep 7, 4:58 PM CDTSevere Thunderstorm WarningILX47 min
Sep 7, 4:58 PM CDTSevere Thunderstorm WarningILX47 min
Sep 7, 5:39 PM CDTSevere Thunderstorm WarningILX36 min
Sep 14, 3:18 PM CDTMesoscale DiscussionSPC117 min
Sep 21, 12:03 AM CDTSpecial Weather StatementILX57 min
Oct 7, 8:41 PM CDTDense Fog AdvisoryILX13 hr
Oct 8, 9:45 PM CDTDense Fog AdvisoryILX6 hr
Oct 11, 9:06 AM CDTMesoscale DiscussionSPC2 hr
Oct 11, 3:10 PM CDTTornado WatchSPC6 hr
Oct 11, 5:03 PM CDTSevere Thunderstorm WarningILX42 min
Oct 11, 5:14 PM CDTSevere Thunderstorm WarningILX61 min
Oct 11, 5:42 PM CDTSevere Thunderstorm WarningILX63 min
Oct 23, 12:50 PM CDTFlash Flood WatchILX56 hr
Oct 24, 5:11 PM CDTMesoscale DiscussionSPC3 hr
Oct 24, 5:39 PM CDTSpecial Weather StatementILX51 min
Oct 24, 6:26 PM CDTSevere Thunderstorm WarningILX34 min
Oct 24, 7:04 PM CDTSevere Thunderstorm WarningILX41 min
Oct 24, 7:08 PM CDTFlash Flood WarningILX3 hr
Oct 24, 7:48 PM CDTFlash Flood WarningILX3 hr
Oct 24, 8:37 PM CDTRiver Flood WarningILX14 hr
Oct 25, 3:18 AM CDTWind AdvisoryILX10 hr
Nov 1, 2:41 PM CDTFreeze WarningILX18 hr
Nov 10, 2:35 AM CSTDense Fog AdvisoryILX6 hr
Dec 10, 12:19 AM CSTDense Fog AdvisoryILX11 hr
Dec 10, 2:57 AM CSTWind AdvisoryILX36 hr
Dec 10, 7:18 PM CSTMesoscale DiscussionSPC87 min
Dec 10, 7:47 PM CSTTornado WatchSPC8 hr
Dec 10, 8:38 PM CSTTornado WarningILX22 min
Dec 10, 8:50 PM CSTTornado WarningILX12 min
Dec 10, 8:53 PM CSTMesoscale DiscussionSPC97 min
Dec 10, 8:58 PM CSTSevere Thunderstorm WarningILX47 min
Dec 14, 2:47 PM CSTWind AdvisoryILX37 hr
Dec 15, 8:27 PM CSTHigh Wind WarningILX7 hr
Dec 26, 1:13 AM CSTDense Fog AdvisoryILX11 hr
Dec 30, 9:28 PM CSTDense Fog AdvisoryILX13 hr

By product

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

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe 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. Warning verification from the Mesonet's Cow. Rebuilt daily.