Alert archive / Illinois / Livingston County

Weather alerts in Livingston County, Illinois, 2012

140 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Livingston County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts
140
Warnings
48
Watches
20
Advisories
29
Busiest month
May37 alerts
Busiest day
May 6, 201215 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 1 tornado warnings covering Livingston County in 2012 had a tornado report inside them.

Livingston County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings24867%11100%30 min
Flash flood warnings5420%1100%16 min

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings9367%650%16 min
NWS Chicago, IL: severe thunderstorm warnings1267441%31182%30 min
NWS Chicago, IL: flash flood warnings181328%3379%88 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 11, 2:05 PM CSTWinter Weather AdvisoryLOT43 hr
Feb 1, 10:14 PM CSTDense Fog AdvisoryLOT15 hr
Feb 2, 8:43 PM CSTDense Fog AdvisoryLOT15 hr
Feb 6, 2:49 AM CSTDense Fog AdvisoryLOT9 hr
Feb 16, 1:12 AM CSTDense Fog AdvisoryLOT4 hr
Feb 26, 3:42 AM CSTWind AdvisoryLOT12 hr
Feb 29, 3:59 AM CSTWind AdvisoryLOT14 hr
Mar 6, 3:23 AM CSTWind AdvisoryLOT15 hr
Mar 7, 3:18 AM CSTWind AdvisoryLOT15 hr
Mar 9, 4:56 PM CSTFire Weather WatchLOT13 hr
Mar 10, 5:30 AM CSTRed Flag WarningLOT13 hr
Mar 15, 5:02 PM CDTMesoscale DiscussionSPC2 hr
Mar 17, 5:06 PM CDTSpecial Weather StatementLOT54 min
Mar 17, 5:44 PM CDTAreal Flood AdvisoryLOT3 hr
Mar 18, 1:41 AM CDTMesoscale DiscussionSPC94 min
Mar 18, 6:15 AM CDTSpecial Weather StatementLOT60 min
Mar 20, 1:08 PM CDTRed Flag WarningLOT6 hr
Mar 23, 4:26 PM CDTSpecial Weather StatementLOT49 min
Mar 27, 8:43 PM CDTMesoscale DiscussionSPC2 hr
Mar 27, 11:22 PM CDTSpecial Weather StatementLOT23 min
Mar 28, 4:58 AM CDTFire Weather WatchLOT6 hr
Mar 28, 10:58 AM CDTRed Flag WarningLOT8 hr
Apr 1, 1:33 AM CDTMesoscale DiscussionSPC117 min
Apr 1, 7:56 AM CDTMesoscale DiscussionSPC2 hr
Apr 3, 2:17 PM CDTMesoscale DiscussionSPC88 min
Apr 3, 5:04 PM CDTSevere Thunderstorm WarningLOT41 min
Apr 4, 3:46 PM CDTFreeze WatchLOT24 hr
Apr 5, 3:40 PM CDTFreeze WarningLOT16 hr
Apr 7, 3:50 PM CDTFire Weather WatchLOT18 hr
Apr 8, 4:42 PM CDTFire Weather WatchLOT12 hr
Apr 9, 4:49 AM CDTRed Flag WarningLOT15 hr
Apr 10, 3:36 AM CDTFreeze WarningLOT28 hr
Apr 10, 4:27 AM CDTFire Weather WatchLOT3 hr
Apr 10, 7:34 AM CDTRed Flag WarningLOT11 hr
Apr 11, 3:49 AM CDTFreeze WarningLOT28 hr
Apr 15, 10:18 AM CDTWind AdvisoryLOT10 hr
Apr 15, 6:12 PM CDTMesoscale DiscussionSPC63 min
Apr 16, 8:28 AM CDTWind AdvisoryLOT10 hr
Apr 22, 5:38 AM CDTFire Weather WatchLOT12 hr
Apr 22, 3:36 PM CDTFreeze WarningLOT12 hr
Apr 22, 5:37 PM CDTRed Flag WarningLOT25 hr
May 3, 3:53 PM CDTMesoscale DiscussionSPC37 min
May 3, 4:20 PM CDTTornado WatchSPC8 hr
May 3, 6:41 PM CDTSevere Thunderstorm WatchSPC5 hr
May 3, 8:07 PM CDTSevere Thunderstorm WarningLOT68 min
May 3, 8:43 PM CDTFlash Flood WatchLOT7 hr
May 3, 10:29 PM CDTMesoscale DiscussionSPC61 min
May 3, 11:34 PM CDTSevere Thunderstorm WatchSPC5 hr
May 4, 12:34 AM CDTSevere Thunderstorm WarningLOT71 min
May 4, 12:46 AM CDTFlash Flood WarningLOT6 hr
May 4, 1:26 AM CDTSevere Thunderstorm WarningLOT63 min
May 4, 2:16 AM CDTMesoscale DiscussionSPC119 min
May 5, 3:29 AM CDTDense Fog AdvisoryLOT6 hr
May 6, 3:56 AM CDTFlash Flood WatchLOT27 hr
May 6, 1:22 PM CDTMesoscale DiscussionSPC53 min
May 6, 1:42 PM CDTSevere Thunderstorm WatchSPC7 hr
May 6, 1:56 PM CDTSevere Thunderstorm WarningLOT64 min
May 6, 2:46 PM CDTSpecial Weather StatementLOT59 min
May 6, 3:19 PM CDTFlash Flood WarningLOT6 hr
May 6, 3:31 PM CDTSevere Thunderstorm WarningLOT59 min
May 6, 3:39 PM CDTFlash Flood WarningLOT6 hr
May 6, 3:42 PM CDTTornado WarningLOT48 min
May 6, 3:43 PM CDTSevere Thunderstorm WarningLOT52 min
May 6, 3:56 PM CDTMesoscale DiscussionSPC64 min
May 6, 4:02 PM CDTSevere Thunderstorm WarningLOT48 min
May 6, 4:03 PM CDTSevere Thunderstorm WarningLOT57 min
May 6, 4:28 PM CDTSevere Thunderstorm WarningLOT32 min
May 6, 5:01 PM CDTSevere Thunderstorm WarningLOT59 min
May 6, 11:22 PM CDTFlash Flood WarningLOT8 hr
May 7, 3:56 AM CDTFlash Flood WarningLOT4 hr
May 7, 7:00 AM CDTAreal Flood WarningLOT22 hr
May 7, 10:17 PM CDTDense Fog AdvisoryLOT8 hr
May 20, 1:17 PM CDTMesoscale DiscussionSPC118 min
May 20, 6:23 PM CDTSevere Thunderstorm WarningLOT67 min
May 20, 7:41 PM CDTSpecial Weather StatementLOT34 min
May 20, 7:46 PM CDTSevere Thunderstorm WarningLOT59 min
May 24, 4:17 AM CDTWind AdvisoryLOT16 hr
May 24, 10:56 AM CDTRed Flag WarningLOT9 hr
Jun 2, 1:05 PM CDTMesoscale DiscussionSPC115 min
Jun 16, 6:40 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 16, 7:14 PM CDTSevere Thunderstorm WarningLOT61 min
Jun 16, 7:58 PM CDTMesoscale DiscussionSPC92 min
Jun 16, 8:20 PM CDTSevere Thunderstorm WarningLOT55 min
Jun 24, 5:09 PM CDTSpecial Weather StatementLOT36 min
Jun 27, 4:22 AM CDTHeat AdvisoryLOT39 hr
Jun 29, 3:19 AM CDTHeat AdvisoryLOT12 hr
Jun 29, 9:22 AM CDTMesoscale DiscussionSPC2 hr
Jun 29, 7:33 PM CDTMesoscale DiscussionSPC87 min
Jun 29, 10:59 PM CDTSevere Thunderstorm WarningLOT46 min
Jun 29, 11:46 PM CDTMesoscale DiscussionSPC119 min
Jul 3, 3:28 AM CDTHeat AdvisoryLOT37 hr
Jul 4, 3:15 AM CDTExcessive Heat WarningLOT4 days
Jul 13, 6:13 PM CDTSpecial Weather StatementLOT47 min
Jul 16, 2:51 PM CDTHeat AdvisoryLOT52 hr
Jul 18, 12:58 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 18, 3:07 PM CDTMesoscale DiscussionSPC53 min
Jul 24, 3:31 PM CDTHeat AdvisoryLOT30 hr
Jul 31, 1:13 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 4, 10:26 AM CDTMesoscale DiscussionSPC49 min
Aug 4, 1:09 PM CDTMesoscale DiscussionSPC66 min
Aug 4, 1:46 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 4, 2:29 PM CDTSpecial Weather StatementLOT31 min
Aug 9, 3:16 PM CDTMesoscale DiscussionSPC89 min
Aug 9, 3:32 PM CDTSevere Thunderstorm WarningLOT73 min
Aug 9, 4:02 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 9, 4:31 PM CDTSevere Thunderstorm WarningLOT53 min
Aug 9, 4:35 PM CDTSevere Thunderstorm WarningLOT55 min
Aug 9, 5:17 PM CDTSevere Thunderstorm WarningLOT43 min
Aug 9, 6:13 PM CDTSevere Thunderstorm WarningLOT62 min
Aug 9, 7:10 PM CDTMesoscale DiscussionSPC2 hr
Aug 9, 7:40 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 14, 12:22 AM CDTDense Fog AdvisoryLOT9 hr
Aug 16, 11:33 AM CDTSevere Thunderstorm WarningLOT42 min
Aug 16, 12:00 PM CDTSevere Thunderstorm WarningLOT30 min
Sep 4, 11:39 PM CDTSpecial Weather StatementLOT36 min
Sep 5, 12:20 AM CDTSpecial Weather StatementLOT55 min
Sep 7, 3:16 PM CDTSpecial Weather StatementLOT59 min
Sep 7, 3:53 PM CDTSevere Thunderstorm WarningLOT37 min
Sep 19, 4:14 AM CDTRed Flag WarningLOT15 hr
Sep 21, 1:36 PM CDTMesoscale DiscussionSPC84 min
Sep 22, 5:35 PM CDTFrost AdvisoryLOT14 hr
Sep 23, 3:20 PM CDTFrost AdvisoryLOT17 hr
Sep 26, 2:28 AM CDTDense Fog AdvisoryLOT7 hr
Oct 5, 3:24 PM CDTFreeze WarningLOT17 hr
Oct 7, 2:57 PM CDTFreeze WarningLOT18 hr
Oct 7, 5:15 PM CDTRed Flag WarningLOT25 hr
Oct 13, 3:07 PM CDTWind AdvisoryLOT28 hr
Oct 14, 2:11 PM CDTMesoscale DiscussionSPC2 hr
Oct 22, 10:04 AM CDTMesoscale DiscussionSPC56 min
Oct 22, 10:32 AM CDTSpecial Weather StatementLOT28 min
Oct 25, 4:44 PM CDTSpecial Weather StatementLOT46 min
Oct 25, 5:29 PM CDTSpecial Weather StatementLOT61 min
Nov 11, 3:27 AM CSTWind AdvisoryLOT15 hr
Nov 20, 6:01 PM CSTDense Fog AdvisoryLOT20 hr
Dec 2, 7:01 PM CSTDense Fog AdvisoryLOT13 hr
Dec 3, 3:29 PM CSTMesoscale DiscussionSPC91 min
Dec 19, 3:56 PM CSTHigh Wind WatchLOT12 hr
Dec 20, 3:55 AM CSTHigh Wind WarningLOT20 hr
Dec 20, 10:52 AM CSTMesoscale DiscussionSPC6 hr
Dec 21, 12:00 AM CSTWind AdvisoryLOT6 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 archive20112013

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.