Alert archive / Illinois / McLean County

Weather alerts in McLean County, Illinois, 2017

113 weather alerts in 2017, 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 2017. Tap one for its archive.

Alerts
113
Warnings
22
Watches
15
Advisories
33
Busiest month
July16 alerts
Busiest day
May 26, 20175 alerts

Over time

By month

Warning verification

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

1 of 1 tornado warnings covering McLean County in 2017 had a tornado report inside them.

McLean County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings110%0
Severe thunderstorm warnings12742%1493%14 min
Flash flood warnings5340%3100%73 min

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Lincoln, IL: tornado warnings23387%2129%11 min
NWS Lincoln, IL: severe thunderstorm warnings1689245%37875%19 min
NWS Lincoln, IL: flash flood warnings311068%2681%142 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 2, 4:59 PM CSTDense Fog AdvisoryILX15 hr
Jan 10, 3:43 AM CSTWind AdvisoryILX17 hr
Jan 11, 11:53 AM CSTDense Fog AdvisoryILX9 hr
Jan 11, 7:36 PM CSTSpecial Weather StatementILX39 min
Jan 12, 3:05 AM CSTMesoscale DiscussionSPC6 hr
Jan 12, 4:00 AM CSTFreezing Rain AdvisoryILX5 hr
Jan 12, 4:13 AM CSTWinter Storm WatchILX59 hr
Jan 13, 4:17 AM CSTFreezing Rain AdvisoryILX56 hr
Jan 14, 3:19 PM CSTWinter Weather AdvisoryILX42 hr
Jan 15, 10:45 PM CSTDense Fog AdvisoryILX13 hr
Jan 16, 12:04 PM CSTDense Fog AdvisoryILX17 hr
Jan 19, 3:08 PM CSTDense Fog AdvisoryILX19 hr
Jan 22, 1:41 AM CSTDense Fog AdvisoryILX9 hr
Feb 6, 4:56 PM CSTDense Fog AdvisoryILX13 hr
Feb 6, 11:20 PM CSTMesoscale DiscussionSPC115 min
Feb 8, 3:27 AM CSTWinter Weather AdvisoryILX15 hr
Feb 19, 1:00 AM CSTDense Fog AdvisoryILX10 hr
Feb 19, 10:08 PM CSTDense Fog AdvisoryILX11 hr
Feb 21, 10:51 PM CSTDense Fog AdvisoryILX12 hr
Feb 23, 4:25 AM CSTDense Fog AdvisoryILX6 hr
Feb 28, 2:03 PM CSTMesoscale DiscussionSPC2 hr
Feb 28, 2:57 PM CSTTornado WatchSPC7 hr
Feb 28, 5:24 PM CSTMesoscale DiscussionSPC96 min
Feb 28, 8:06 PM CSTMesoscale DiscussionSPC84 min
Feb 28, 9:51 PM CSTTornado WatchSPC6 hr
Feb 28, 10:32 PM CSTSpecial Weather StatementILX28 min
Feb 28, 10:44 PM CSTSevere Thunderstorm WarningILX46 min
Mar 6, 10:15 PM CSTMesoscale DiscussionSPC60 min
Mar 6, 10:35 PM CSTSevere Thunderstorm WatchSPC4 hr
Mar 7, 12:03 AM CSTTornado WarningILX27 min
Mar 7, 12:21 AM CSTSevere Thunderstorm WarningILX54 min
Mar 8, 3:50 AM CSTWind AdvisoryILX14 hr
Mar 8, 10:44 AM CSTRed Flag WarningILX6 hr
Mar 12, 3:37 AM CDTWinter Weather AdvisoryILX35 hr
Mar 20, 3:10 AM CDTSevere Thunderstorm WarningILX50 min
Apr 10, 11:57 AM CDTMesoscale DiscussionSPC3 hr
Apr 10, 1:48 PM CDTSevere Thunderstorm WatchSPC8 hr
Apr 10, 3:25 PM CDTMesoscale DiscussionSPC2 hr
Apr 10, 6:22 PM CDTMesoscale DiscussionSPC53 min
Apr 14, 5:23 PM CDTSpecial Weather StatementILX22 min
Apr 27, 2:41 PM CDTFlash Flood WatchILX5 days
Apr 28, 10:52 AM CDTRiver Flood WarningILX5 days
Apr 29, 6:14 PM CDTSevere Thunderstorm WarningILX46 min
May 10, 12:05 PM CDTMesoscale DiscussionSPC2 hr
May 10, 12:59 PM CDTSevere Thunderstorm WatchSPC7 hr
May 10, 3:48 PM CDTMesoscale DiscussionSPC87 min
May 10, 6:26 PM CDTMesoscale DiscussionSPC94 min
May 10, 7:36 PM CDTSpecial Weather StatementILX39 min
May 17, 4:18 AM CDTWind AdvisoryILX21 hr
May 26, 1:25 PM CDTMesoscale DiscussionSPC3 hr
May 26, 2:45 PM CDTTornado WatchSPC5 hr
May 26, 3:11 PM CDTSevere Thunderstorm WarningILX23 min
May 26, 4:05 PM CDTSevere Thunderstorm WarningILX40 min
May 26, 4:31 PM CDTMesoscale DiscussionSPC59 min
Jun 14, 12:40 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 14, 4:30 PM CDTSevere Thunderstorm WarningILX45 min
Jun 17, 5:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 17, 8:17 PM CDTMesoscale DiscussionSPC58 min
Jun 17, 8:54 PM CDTSevere Thunderstorm WarningILX51 min
Jun 17, 9:10 PM CDTFlash Flood WarningILX3 hr
Jun 17, 11:55 PM CDTAreal Flood WarningILX12 hr
Jun 19, 12:44 PM CDTMesoscale DiscussionSPC3 hr
Jun 19, 6:56 PM CDTSpecial Weather StatementILX49 min
Jun 20, 2:05 PM CDTMesoscale DiscussionSPC2 hr
Jun 29, 7:23 PM CDTSpecial Weather StatementILX22 min
Jul 4, 12:16 PM CDTSpecial Weather StatementILX29 min
Jul 4, 2:55 PM CDTSpecial Weather StatementILX35 min
Jul 10, 6:46 AM CDTMesoscale DiscussionSPC119 min
Jul 10, 2:48 PM CDTMesoscale DiscussionSPC117 min
Jul 10, 3:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 10, 6:18 PM CDTMesoscale DiscussionSPC87 min
Jul 10, 8:02 PM CDTSevere Thunderstorm WarningILX43 min
Jul 10, 8:56 PM CDTMesoscale DiscussionSPC2 hr
Jul 11, 8:54 AM CDTSevere Thunderstorm WarningILX51 min
Jul 12, 3:36 AM CDTHeat AdvisoryILX15 hr
Jul 12, 3:21 PM CDTFlash Flood WatchILX11 hr
Jul 16, 2:06 PM CDTMesoscale DiscussionSPC54 min
Jul 17, 3:11 PM CDTExcessive Heat WatchILX24 hr
Jul 18, 3:07 PM CDTHeat AdvisoryILX4 days
Jul 23, 1:03 PM CDTMesoscale DiscussionSPC2 hr
Jul 26, 4:55 PM CDTMesoscale DiscussionSPC65 min
Aug 1, 12:37 PM CDTSpecial Weather StatementILX3 hr
Aug 1, 4:32 PM CDTFlash Flood WarningILX4 hr
Aug 3, 2:15 PM CDTSpecial Weather StatementILX45 min
Aug 3, 5:18 PM CDTMesoscale DiscussionSPC2 hr
Aug 3, 6:48 PM CDTSevere Thunderstorm WarningILX57 min
Aug 22, 4:34 AM CDTAreal Flood AdvisoryILX3 hr
Aug 28, 3:19 PM CDTSpecial Weather StatementILX41 min
Aug 28, 6:33 PM CDTSpecial Weather StatementILX57 min
Aug 28, 11:07 PM CDTDense Fog AdvisoryILX11 hr
Aug 30, 4:37 AM CDTDense Fog AdvisoryILX4 hr
Sep 4, 3:43 PM CDTMesoscale DiscussionSPC2 hr
Sep 14, 1:09 AM CDTDense Fog AdvisoryILX9 hr
Oct 9, 7:47 AM CDTDense Fog AdvisoryILX3 hr
Oct 14, 5:09 PM CDTTornado WatchSPC8 hr
Oct 14, 6:01 PM CDTMesoscale DiscussionSPC89 min
Oct 14, 8:14 PM CDTSevere Thunderstorm WarningILX33 min
Oct 14, 9:04 PM CDTMesoscale DiscussionSPC86 min
Oct 25, 3:16 AM CDTFrost AdvisoryILX29 hr
Oct 27, 3:24 AM CDTFreeze WatchILX12 hr
Oct 27, 2:56 PM CDTFreeze WarningILX42 hr
Nov 5, 3:58 AM CSTDense Fog AdvisoryILX6 hr
Nov 5, 6:04 AM CSTMesoscale DiscussionSPC2 hr
Nov 18, 5:29 AM CSTMesoscale DiscussionSPC3 hr
Nov 18, 7:20 AM CSTSpecial Weather StatementILX40 min
Nov 18, 8:20 AM CSTFlash Flood WarningILX6 hr
Nov 18, 8:52 AM CSTFlash Flood WarningILX6 hr
Nov 18, 8:59 AM CSTFlash Flood WarningILX6 hr
Dec 13, 10:58 AM CSTWind AdvisoryILX10 hr
Dec 23, 3:39 AM CSTWinter Weather AdvisoryILX38 hr
Dec 26, 3:56 AM CSTWind Chill AdvisoryILX30 hr
Dec 28, 3:18 PM CSTWinter Weather AdvisoryILX31 hr
Dec 29, 3:00 PM CSTWind Chill AdvisoryILX4 days

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 archive20162018

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.