Alert archive / Illinois / Shelby County
Weather alerts in Shelby County, Illinois, 2015
102 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 102
- Warnings
- 24
- Watches
- 20
- Advisories
- 35
- Busiest month
- June20 alerts
- Busiest day
- June 19, 20155 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 Shelby County in 2015 had a tornado report inside them.
Shelby County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 9 | 3 | 67% | 6 | 50% | 7 min |
| Flash flood warnings | 3 | 2 | 33% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 20 | 4 | 80% | 16 | 31% | 3 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 150 | 72 | 52% | 307 | 67% | 22 min |
| NWS Lincoln, IL: flash flood warnings | 78 | 25 | 68% | 55 | 80% | 144 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 6, 3:13 AM CST | Wind Chill Advisory | ILX | 57 hr |
| Jan 10, 3:17 PM CST | Winter Weather Advisory | ILX | 42 hr |
| Jan 31, 4:04 AM CST | Winter Weather Advisory | ILX | 44 hr |
| Feb 15, 3:14 AM CST | Winter Weather Advisory | ILX | 38 hr |
| Feb 17, 3:19 PM CST | Wind Chill Advisory | ILX | 45 hr |
| Feb 20, 4:02 AM CST | Winter Weather Advisory | ILX | 11 hr |
| Feb 20, 2:42 PM CST | Winter Storm Warning | ILX | 19 hr |
| Feb 20, 10:40 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 22, 3:12 AM CST | Wind Chill Advisory | ILX | 30 hr |
| Feb 24, 3:41 AM CST | Wind Chill Advisory | ILX | 4 hr |
| Feb 28, 3:09 AM CST | Winter Weather Advisory | ILX | 39 hr |
| Mar 1, 2:55 AM CST | Winter Storm Warning | ILX | 12 hr |
| Mar 2, 3:06 PM CST | Winter Weather Advisory | ILX | 19 hr |
| Mar 10, 7:54 PM CDT | Dense Fog Advisory | ILX | 16 hr |
| Mar 13, 10:50 PM CDT | Dense Fog Advisory | ILX | 8 hr |
| Apr 2, 2:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 7, 6:48 AM CDT | Dense Fog Advisory | ILX | 4 hr |
| Apr 8, 12:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 8, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 8, 2:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 8, 3:17 PM CDT | Flash Flood Watch | ILX | 32 hr |
| Apr 9, 3:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Apr 9, 6:48 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 9, 8:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 9, 8:13 PM CDT | Tornado Warning | ILX | 32 min |
| Apr 9, 8:28 PM CDT | Severe Thunderstorm Warning | ILX | 47 min |
| Apr 17, 2:05 AM CDT | Dense Fog Advisory | ILX | 7 hr |
| Apr 22, 3:04 PM CDT | Frost Advisory | ILX | 17 hr |
| Apr 23, 3:39 PM CDT | Frost Advisory | ILX | 16 hr |
| May 8, 12:59 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 9, 6:39 AM CDT | Dense Fog Advisory | ILX | 2 hr |
| May 10, 6:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 10, 6:35 PM CDT | Severe Thunderstorm Warning | ILX | 40 min |
| May 11, 5:50 AM CDT | Special Weather Statement | ILX | 40 min |
| May 24, 5:34 PM CDT | Tornado Watch | SPC | 7 hr |
| May 24, 10:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 24, 11:29 PM CDT | Severe Thunderstorm Warning | ILX | 25 min |
| Jun 7, 7:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 7, 9:15 PM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Jun 7, 9:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 15, 7:00 PM CDT | Severe Thunderstorm Warning | ILX | 30 min |
| Jun 15, 7:31 PM CDT | Severe Thunderstorm Warning | ILX | 29 min |
| Jun 16, 3:14 AM CDT | Flash Flood Watch | ILX | 40 hr |
| Jun 19, 5:26 AM CDT | Flash Flood Warning | ILX | 6 hr |
| Jun 19, 6:32 AM CDT | Flash Flood Warning | ILX | 12 hr |
| Jun 19, 11:34 AM CDT | Areal Flood Advisory | ILX | 6 hr |
| Jun 19, 11:42 AM CDT | Areal Flood Warning | ILX | 12 hr |
| Jun 19, 6:27 PM CDT | Areal Flood Warning | ILX | 15 hr |
| Jun 19, 11:46 PM CDT | Areal Flood Warning | ILX | 9 hr |
| Jun 20, 3:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 20, 10:13 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 20, 10:46 PM CDT | Severe Thunderstorm Warning | ILX | 59 min |
| Jun 25, 3:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 26, 4:05 AM CDT | Flash Flood Watch | ILX | 18 hr |
| Jun 28, 7:45 PM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Jun 28, 11:06 PM CDT | Areal Flood Advisory | ILX | 3 hr |
| Jul 7, 2:46 PM CDT | Flash Flood Watch | ILX | 39 hr |
| Jul 11, 12:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 11, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 6:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 11, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 9:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 12, 3:14 PM CDT | Heat Advisory | ILX | 29 hr |
| Jul 12, 3:27 PM CDT | Flash Flood Watch | ILX | 31 hr |
| Jul 13, 4:01 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 13, 6:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 14, 12:56 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 16, 9:55 PM CDT | Mesoscale Discussion | SPC | 110 min |
| Jul 17, 10:16 AM CDT | Heat Advisory | ILX | 33 hr |
| Jul 27, 3:01 PM CDT | Heat Advisory | ILX | 29 hr |
| Aug 9, 9:56 AM CDT | Special Weather Statement | ILX | 64 min |
| Aug 18, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 3:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 18, 6:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Oct 15, 2:56 PM CDT | Freeze Watch | ILX | 12 hr |
| Oct 16, 2:45 AM CDT | Freeze Warning | ILX | 30 hr |
| Oct 17, 2:33 PM CDT | Freeze Warning | ILX | 18 hr |
| Nov 1, 5:58 AM CST | Dense Fog Advisory | ILX | 3 hr |
| Nov 2, 6:58 AM CST | Dense Fog Advisory | ILX | 3 hr |
| Nov 2, 7:59 PM CST | Dense Fog Advisory | ILX | 14 hr |
| Nov 3, 7:16 PM CST | Dense Fog Advisory | ILX | 15 hr |
| Nov 10, 3:41 PM CST | Wind Advisory | ILX | 50 hr |
| Nov 16, 3:08 AM CST | Flood Watch | ILX | 51 hr |
| Dec 4, 1:52 AM CST | Dense Fog Advisory | ILX | 11 hr |
| Dec 4, 5:53 PM CST | Dense Fog Advisory | ILX | 18 hr |
| Dec 6, 9:24 PM CST | Dense Fog Advisory | ILX | 23 hr |
| Dec 23, 9:13 AM CST | Tornado Watch | SPC | 8 hr |
| Dec 23, 9:16 AM CST | Special Weather Statement | ILX | 29 min |
| Dec 23, 9:48 AM CST | Severe Thunderstorm Warning | ILX | 27 min |
| Dec 25, 3:27 AM CST | Flash Flood Watch | ILX | 5 days |
| Dec 26, 10:15 AM CST | Areal Flood Advisory | ILX | 6 hr |
| Dec 26, 12:03 PM CST | Areal Flood Advisory | ILX | 3 hr |
| Dec 26, 2:56 PM CST | Areal Flood Advisory | ILX | 6 hr |
| Dec 26, 4:38 PM CST | Areal Flood Advisory | ILX | 6 hr |
| Dec 26, 8:01 PM CST | Flash Flood Warning | ILX | 8 hr |
| Dec 27, 4:03 AM CST | Areal Flood Warning | ILX | 12 hr |
| Dec 27, 3:15 PM CST | Wind Advisory | ILX | 26 hr |
| Dec 27, 3:51 PM CST | Areal Flood Warning | ILX | 24 hr |
| Dec 28, 3:41 PM CST | Areal Flood Warning | ILX | 48 hr |
| Dec 30, 3:27 PM CST | Areal Flood Warning | ILX | 24 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 | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 3 |
| Flooding | |
| Areal Flood Warning | 7 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 6 |
| Flood Watch | 1 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Weather Advisory | 6 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.