Alert archive / Illinois / Shelby County
Weather alerts in Shelby County, Illinois, 2013
107 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 107
- Warnings
- 21
- Watches
- 22
- Advisories
- 24
- Busiest month
- April26 alerts
- Busiest day
- April 18, 20137 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 5 tornado warnings covering Shelby County in 2013 had a tornado report inside them.
Shelby County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 0 | ||
| Severe thunderstorm warnings | 7 | 3 | 57% | 3 | 67% | 22 min |
| Flash flood warnings | 4 | 2 | 50% | 1 | 0% |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 27 | 9 | 67% | 33 | 94% | 15 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 111 | 45 | 59% | 212 | 57% | 17 min |
| NWS Lincoln, IL: flash flood warnings | 64 | 27 | 58% | 82 | 91% | 283 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 12, 2:37 PM CST | Winter Weather Advisory | ILX | 19 hr |
| Jan 12, 6:17 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 26, 2:59 PM CST | Freezing Rain Advisory | ILX | 24 hr |
| Jan 28, 2:02 PM CST | Flood Watch | ILX | 40 hr |
| Jan 29, 6:08 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 10, 9:40 PM CST | Wind Advisory | ILX | 17 hr |
| Feb 18, 2:55 AM CST | Wind Advisory | ILX | 15 hr |
| Feb 20, 3:49 PM CST | Winter Weather Advisory | ILX | 43 hr |
| Feb 21, 3:37 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 4, 4:01 PM CST | Winter Weather Advisory | ILX | 32 hr |
| Mar 22, 3:10 PM CDT | Winter Storm Watch | ILX | 25 hr |
| Mar 23, 3:57 PM CDT | Winter Storm Warning | ILX | 39 hr |
| Mar 24, 9:12 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 24, 11:52 AM CDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 24, 11:44 PM CDT | Winter Weather Advisory | ILX | 7 hr |
| Apr 10, 12:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 10, 12:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 10, 1:11 PM CDT | Tornado Warning | ILX | 34 min |
| Apr 10, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 10, 6:52 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 10, 8:28 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 8:58 PM CDT | Severe Thunderstorm Warning | ILX | 62 min |
| Apr 14, 3:47 AM CDT | Wind Advisory | ILX | 16 hr |
| Apr 16, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 16, 12:02 AM CDT | Mesoscale Discussion | SPC | 28 min |
| Apr 16, 2:00 AM CDT | Special Weather Statement | ILX | 60 min |
| Apr 16, 2:28 PM CDT | Special Weather Statement | ILX | 62 min |
| Apr 16, 3:39 PM CDT | Flash Flood Watch | ILX | 60 hr |
| Apr 16, 8:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 17, 3:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Apr 17, 3:33 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 17, 6:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 17, 8:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 17, 10:48 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 18, 3:50 AM CDT | Wind Advisory | ILX | 7 hr |
| Apr 18, 7:25 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 18, 11:23 AM CDT | Areal Flood Advisory | ILX | 6 hr |
| Apr 18, 2:18 PM CDT | Flash Flood Warning | ILX | 18 hr |
| Apr 18, 5:27 PM CDT | Special Weather Statement | ILX | 63 min |
| Apr 19, 8:14 AM CDT | Areal Flood Warning | ILX | 24 hr |
| Apr 19, 2:14 PM CDT | Freeze Warning | ILX | 17 hr |
| May 9, 12:45 PM CDT | Areal Flood Advisory | ILX | 3 hr |
| May 9, 4:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 3:17 PM CDT | Frost Advisory | ILX | 16 hr |
| May 20, 10:01 PM CDT | Severe Thunderstorm Warning | ILX | 44 min |
| May 20, 10:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 20, 10:56 PM CDT | Tornado Watch | SPC | 6 hr |
| May 26, 3:27 PM CDT | Flash Flood Watch | ILX | 62 hr |
| May 27, 12:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 27, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 30, 3:48 AM CDT | Flash Flood Watch | ILX | 63 hr |
| May 30, 11:29 AM CDT | Mesoscale Discussion | SPC | 61 min |
| May 30, 12:32 PM CDT | Tornado Watch | SPC | 7 hr |
| May 30, 3:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 30, 7:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 30, 7:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 31, 7:23 PM CDT | Tornado Watch | SPC | 6 hr |
| May 31, 8:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 31, 9:16 PM CDT | Tornado Warning | ILX | 29 min |
| May 31, 9:24 PM CDT | Severe Thunderstorm Warning | ILX | 51 min |
| May 31, 9:40 PM CDT | Severe Thunderstorm Warning | ILX | 65 min |
| May 31, 9:44 PM CDT | Tornado Warning | ILX | 31 min |
| May 31, 10:19 PM CDT | Severe Thunderstorm Warning | ILX | 26 min |
| Jun 9, 1:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 9, 2:04 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 1:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 18, 1:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 18, 1:53 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 3:22 PM CDT | Flash Flood Warning | ILX | 4 hr |
| Jun 18, 5:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 21, 5:15 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 22, 2:24 PM CDT | Areal Flood Advisory | ILX | 4 hr |
| Jun 22, 5:03 PM CDT | Flash Flood Warning | ILX | 6 hr |
| Jun 25, 12:43 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 25, 3:06 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 25, 9:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 25, 9:49 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 5:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 21, 3:42 AM CDT | Dense Fog Advisory | ILX | 4 hr |
| Aug 31, 2:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 31, 6:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Sep 1, 6:02 AM CDT | Dense Fog Advisory | ILX | 3 hr |
| Oct 2, 4:53 AM CDT | Dense Fog Advisory | ILX | 5 hr |
| Oct 3, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Oct 5, 12:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 5, 1:56 PM CDT | Areal Flood Advisory | ILX | 6 hr |
| Oct 5, 2:08 PM CDT | Flash Flood Warning | ILX | 6 hr |
| Oct 21, 3:49 AM CDT | Frost Advisory | ILX | 28 hr |
| Oct 22, 3:00 PM CDT | Freeze Warning | ILX | 13 hr |
| Oct 23, 3:02 PM CDT | Freeze Warning | ILX | 42 hr |
| Oct 30, 5:32 AM CDT | Dense Fog Advisory | ILX | 4 hr |
| Oct 30, 1:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Nov 16, 2:37 PM CST | Wind Advisory | ILX | 27 hr |
| Nov 17, 7:47 AM CST | Mesoscale Discussion | SPC | 88 min |
| Nov 17, 8:40 AM CST | Tornado Watch | SPC | 7 hr |
| Nov 17, 10:49 AM CST | Mesoscale Discussion | SPC | 86 min |
| Nov 17, 11:43 AM CST | Severe Thunderstorm Warning | ILX | 47 min |
| Nov 17, 11:55 AM CST | Tornado Warning | ILX | 50 min |
| Nov 17, 12:18 PM CST | Severe Thunderstorm Warning | ILX | 42 min |
| Nov 17, 12:26 PM CST | Tornado Warning | ILX | 49 min |
| Dec 3, 9:19 PM CST | Dense Fog Advisory | ILX | 15 hr |
| Dec 5, 3:19 AM CST | Winter Weather Advisory | ILX | 39 hr |
| Dec 5, 6:25 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 8, 3:21 PM CST | Freezing Rain Advisory | ILX | 9 hr |
| Dec 12, 4:03 PM CST | Winter Weather Advisory | ILX | 44 hr |
| Dec 19, 3:54 AM CST | Flood Watch | ILX | 68 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 7 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 37 |
| Special Weather Statement | 3 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.