Alert archive / Illinois / Shelby County

Weather alerts in Shelby County, Illinois, 2014

102 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Shelby County and its neighbors

Each county as a circle sized by its count in 2014. Tap one for its archive.

Alerts
102
Warnings
20
Watches
20
Advisories
27
Busiest month
February23 alerts
Busiest day
February 20, 201411 alerts

Over time

By month

Warning verification

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

3 of 4 tornado warnings covering Shelby County in 2014 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 16 minutes after it went out.

Shelby County, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings4325%3100%16 min
Severe thunderstorm warnings6350%560%26 min
Flash flood warnings10100%0

Each office's whole area, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Lincoln, IL: tornado warnings23865%1984%14 min
NWS Lincoln, IL: severe thunderstorm warnings1095153%22755%22 min
NWS Lincoln, IL: flash flood warnings401075%3569%83 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, 3:16 AM CSTWinter Weather AdvisoryILX30 hr
Jan 3, 11:40 AM CSTWinter Storm WatchILX16 hr
Jan 4, 4:01 AM CSTWinter Storm WarningILX44 hr
Jan 4, 3:15 PM CSTWind Chill WarningILX69 hr
Jan 5, 9:42 AM CSTMesoscale DiscussionSPC5 hr
Jan 22, 3:45 AM CSTWind Chill AdvisoryILX55 hr
Jan 25, 3:02 PM CSTWind Chill AdvisoryILX66 hr
Jan 26, 3:32 AM CSTWind AdvisoryILX24 hr
Jan 31, 3:01 PM CSTWinter Weather AdvisoryILX39 hr
Feb 3, 4:14 AM CSTWinter Storm WatchILX11 hr
Feb 3, 3:33 PM CSTWinter Storm WarningILX44 hr
Feb 4, 11:38 AM CSTMesoscale DiscussionSPC6 hr
Feb 5, 3:14 AM CSTWind Chill AdvisoryILX33 hr
Feb 6, 3:19 AM CSTWind Chill AdvisoryILX32 hr
Feb 13, 3:19 PM CSTWinter Weather AdvisoryILX27 hr
Feb 14, 9:59 AM CSTMesoscale DiscussionSPC5 hr
Feb 16, 3:43 AM CSTWinter Weather AdvisoryILX36 hr
Feb 19, 9:16 PM CSTHigh Wind WatchILX6 hr
Feb 20, 3:15 AM CSTWind AdvisoryILX24 hr
Feb 20, 3:23 PM CSTMesoscale DiscussionSPC97 min
Feb 20, 3:50 PM CSTSevere Thunderstorm WatchSPC56 min
Feb 20, 4:01 PM CSTSevere Thunderstorm WarningILX59 min
Feb 20, 4:11 PM CSTTornado WarningILX34 min
Feb 20, 4:40 PM CSTTornado WarningILX35 min
Feb 20, 4:45 PM CSTTornado WatchSPC3 hr
Feb 20, 4:47 PM CSTTornado WarningILX28 min
Feb 20, 5:06 PM CSTSevere Thunderstorm WarningILX54 min
Feb 20, 5:42 PM CSTFlash Flood WarningILX6 hr
Feb 20, 10:48 PM CSTAreal Flood WarningILX15 hr
Feb 21, 12:31 PM CSTAreal Flood AdvisoryILX51 hr
Feb 22, 9:01 PM CSTMesoscale DiscussionSPC4 hr
Feb 28, 3:24 AM CSTWinter Storm WatchILX36 hr
Mar 1, 3:04 PM CSTWinter Storm WarningILX33 hr
Mar 11, 3:17 AM CDTWinter Weather AdvisoryILX32 hr
Mar 11, 10:39 PM CDTWind AdvisoryILX12 hr
Apr 2, 3:03 AM CDTFlood WatchILX48 hr
Apr 3, 2:49 AM CDTMesoscale DiscussionSPC116 min
Apr 3, 7:26 PM CDTMesoscale DiscussionSPC94 min
Apr 10, 4:01 PM CDTMesoscale DiscussionSPC89 min
Apr 14, 3:08 PM CDTFreeze WarningILX18 hr
Apr 15, 3:07 PM CDTFreeze WarningILX16 hr
Apr 28, 1:11 PM CDTTornado WatchSPC7 hr
Apr 28, 3:38 PM CDTMesoscale DiscussionSPC2 hr
Apr 28, 4:59 PM CDTSevere Thunderstorm WarningILX61 min
Apr 28, 5:56 PM CDTSevere Thunderstorm WarningILX49 min
Apr 28, 6:10 PM CDTMesoscale DiscussionSPC95 min
Apr 28, 6:32 PM CDTSevere Thunderstorm WarningILX43 min
May 9, 11:46 AM CDTMesoscale DiscussionSPC59 min
May 9, 12:50 PM CDTSevere Thunderstorm WatchSPC7 hr
May 9, 6:25 PM CDTMesoscale DiscussionSPC65 min
May 11, 4:09 PM CDTSevere Thunderstorm WarningILX66 min
May 21, 1:40 PM CDTMesoscale DiscussionSPC2 hr
May 21, 3:12 PM CDTMesoscale DiscussionSPC2 hr
May 21, 7:28 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 4, 1:29 AM CDTMesoscale DiscussionSPC91 min
Jun 4, 1:52 AM CDTSevere Thunderstorm WatchSPC3 hr
Jun 4, 3:46 AM CDTMesoscale DiscussionSPC59 min
Jun 7, 4:44 PM CDTTornado WatchSPC7 hr
Jun 12, 5:05 AM CDTDense Fog AdvisoryILX4 hr
Jun 12, 7:21 PM CDTAreal Flood AdvisoryILX6 hr
Jun 18, 2:56 PM CDTMesoscale DiscussionSPC94 min
Jun 21, 1:33 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 21, 6:16 PM CDTMesoscale DiscussionSPC89 min
Jun 23, 10:02 PM CDTAreal Flood AdvisoryILX3 hr
Jun 30, 10:18 AM CDTMesoscale DiscussionSPC87 min
Jul 7, 8:52 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 8, 12:49 AM CDTMesoscale DiscussionSPC86 min
Jul 14, 11:42 AM CDTSevere Thunderstorm WatchSPC6 hr
Jul 14, 2:21 PM CDTMesoscale DiscussionSPC54 min
Jul 25, 2:10 PM CDTSpecial Weather StatementILX65 min
Jul 26, 3:20 PM CDTMesoscale DiscussionSPC115 min
Aug 6, 4:16 AM CDTDense Fog AdvisoryILX5 hr
Aug 18, 3:21 AM CDTDense Fog AdvisoryILX6 hr
Aug 21, 3:07 PM CDTHeat AdvisoryILX5 days
Aug 23, 11:18 AM CDTMesoscale DiscussionSPC117 min
Aug 24, 3:00 AM CDTExcessive Heat WarningILX64 hr
Aug 26, 2:09 PM CDTMesoscale DiscussionSPC3 hr
Aug 27, 1:09 PM CDTMesoscale DiscussionSPC3 hr
Sep 1, 2:23 PM CDTFlash Flood WatchILX17 hr
Sep 5, 2:38 PM CDTMesoscale DiscussionSPC67 min
Sep 5, 3:43 PM CDTSevere Thunderstorm WatchSPC6 hr
Sep 5, 5:11 PM CDTMesoscale DiscussionSPC94 min
Sep 5, 7:52 PM CDTMesoscale DiscussionSPC83 min
Sep 9, 1:48 PM CDTFlash Flood WatchILX30 hr
Sep 10, 1:48 PM CDTMesoscale DiscussionSPC117 min
Sep 10, 3:24 PM CDTSevere Thunderstorm WatchSPC6 hr
Sep 17, 1:26 AM CDTDense Fog AdvisoryILX8 hr
Sep 20, 4:22 PM CDTMesoscale DiscussionSPC113 min
Oct 2, 11:59 AM CDTMesoscale DiscussionSPC91 min
Oct 4, 2:41 PM CDTFrost AdvisoryILX16 hr
Oct 7, 1:44 PM CDTMesoscale DiscussionSPC2 hr
Oct 13, 1:08 PM CDTMesoscale DiscussionSPC2 hr
Oct 13, 2:24 PM CDTTornado WatchSPC7 hr
Oct 13, 3:40 PM CDTTornado WarningILX20 min
Oct 13, 3:42 PM CDTMesoscale DiscussionSPC93 min
Oct 18, 2:51 AM CDTFrost AdvisoryILX29 hr
Oct 30, 3:00 PM CDTFreeze WarningILX42 hr
Nov 16, 3:40 AM CSTWinter Weather AdvisoryILX18 hr
Nov 24, 3:40 AM CSTWind AdvisoryILX11 hr
Dec 5, 12:44 AM CSTDense Fog AdvisoryILX9 hr
Dec 14, 7:29 AM CSTDense Fog AdvisoryILX4 hr
Dec 23, 2:16 PM CSTWinter Weather AdvisoryILX19 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 archive20132015

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.