Alert archive / Illinois / Shelby County
Weather alerts in Shelby County, Illinois, 2008
167 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 167
- Warnings
- 46
- Watches
- 40
- Advisories
- 36
- Busiest month
- June42 alerts
- Busiest day
- December 27, 200814 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 7 tornado warnings covering Shelby County in 2008 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 27 minutes after it went out.
Shelby County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 7 | 2 | 71% | 1 | 100% | 27 min |
| Severe thunderstorm warnings | 24 | 9 | 63% | 7 | 71% | 14 min |
| Flash flood warnings | 5 | 0 | 100% | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 70 | 10 | 86% | 23 | 65% | 21 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 299 | 120 | 60% | 391 | 76% | 24 min |
| NWS Lincoln, IL: flash flood warnings | 58 | 5 | 91% | 30 | 40% | 47 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 7, 1:52 PM CST | Tornado Watch | SPC | 146 days |
| Jan 7, 9:08 PM CST | Flood Watch | ILX | 18 hr |
| Jan 7, 10:12 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 18, 2:44 PM CST | Wind Chill Advisory | ILX | 42 hr |
| Jan 21, 3:47 PM CST | Winter Weather Advisory | ILX | 11 hr |
| Jan 27, 3:12 PM CST | Wind Advisory | ILX | 30 hr |
| Jan 28, 9:29 PM CST | Wind Advisory | ILX | 29 hr |
| Jan 30, 3:19 AM CST | Winter Storm Watch | ILX | 24 hr |
| Jan 31, 3:26 AM CST | Winter Storm Warning | ILX | 32 hr |
| Jan 31, 6:23 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 1, 1:43 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 2, 11:24 PM CST | Freezing Fog Advisory | ILX | 13 hr |
| Feb 4, 2:33 AM CST | Dense Fog Advisory | ILX | 33 hr |
| Feb 4, 4:08 PM CST | Flood Watch | ILX | 35 hr |
| Feb 4, 7:14 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 4, 9:44 PM CST | Mesoscale Discussion | SPC | 91 min |
| Feb 5, 4:46 PM CST | Mesoscale Discussion | SPC | 119 min |
| Feb 5, 4:59 PM CST | Flash Flood Warning | ILX | 6 hr |
| Feb 5, 6:32 PM CST | Severe Thunderstorm Warning | ILX | 28 min |
| Feb 5, 11:03 PM CST | Flash Flood Warning | ILX | 3 hr |
| Feb 10, 3:21 PM CST | Winter Storm Watch | ILX | 13 hr |
| Feb 11, 4:01 AM CST | Winter Weather Advisory | ILX | 29 hr |
| Feb 17, 11:33 AM CST | Wind Advisory | ILX | 8 hr |
| Feb 21, 4:19 AM CST | Winter Storm Warning | ILX | 35 hr |
| Feb 21, 4:19 AM CST | Winter Weather Advisory | ILX | 38 hr |
| Feb 25, 3:07 PM CST | Snow and Blowing Snow Advisory | ILX | 12 hr |
| Mar 2, 7:59 PM CST | Flood Watch | ILX | 31 hr |
| Mar 3, 3:04 AM CST | Winter Storm Watch | ILX | 12 hr |
| Mar 3, 2:04 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 3, 3:25 PM CST | Snow Advisory | ILX | 27 hr |
| Mar 3, 3:25 PM CST | Winter Storm Warning | ILX | 12 hr |
| Mar 3, 3:25 PM CST | Winter Weather Advisory | ILX | 29 hr |
| Mar 4, 7:32 AM CST | Winter Storm Warning | ILX | 8 hr |
| Mar 16, 4:00 PM CDT | Flood Watch | ILX | 70 hr |
| Mar 27, 6:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 27, 7:35 PM CDT | Severe Thunderstorm Warning | ILX | 40 min |
| Mar 31, 11:59 AM CDT | Flash Flood Watch | ILX | 15 hr |
| Apr 8, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 8, 11:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 9, 3:16 AM CDT | Flash Flood Watch | ILX | 45 hr |
| Apr 10, 11:16 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 8:57 AM CDT | Wind Advisory | ILX | 10 hr |
| Apr 25, 7:13 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 25, 7:34 PM CDT | Severe Thunderstorm Warning | ILX | 41 min |
| May 2, 10:03 AM CDT | Severe Thunderstorm Warning | ILX | 42 min |
| May 11, 2:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| May 11, 3:52 AM CDT | Wind Advisory | ILX | 15 hr |
| May 13, 5:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 13, 7:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 30, 1:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 1:56 PM CDT | Tornado Watch | SPC | 8 hr |
| May 30, 5:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 30, 8:13 PM CDT | Tornado Warning | ILX | 47 min |
| May 30, 8:37 PM CDT | Tornado Warning | ILX | 23 min |
| May 30, 9:16 PM CDT | Mesoscale Discussion | SPC | 29 min |
| May 30, 9:58 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 2, 9:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 3, 2:53 AM CDT | Tornado Warning | ILX | 37 min |
| Jun 3, 3:06 AM CDT | Tornado Warning | ILX | 24 min |
| Jun 3, 3:08 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 3, 3:29 AM CDT | Tornado Warning | ILX | 16 min |
| Jun 3, 3:31 AM CDT | Tornado Watch | SPC | 10 hr |
| Jun 3, 7:17 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 3, 10:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 3, 10:51 AM CDT | Severe Thunderstorm Warning | ILX | 39 min |
| Jun 3, 11:47 AM CDT | Severe Thunderstorm Warning | ILX | 43 min |
| Jun 3, 3:06 PM CDT | Flash Flood Watch | ILX | 30 hr |
| Jun 3, 5:56 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 3, 9:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 3, 10:57 PM CDT | Severe Thunderstorm Warning | ILX | 63 min |
| Jun 3, 11:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 4, 2:06 AM CDT | Tornado Watch | SPC | 5 hr |
| Jun 6, 5:14 AM CDT | Mesoscale Discussion | SPC | 61 min |
| Jun 6, 7:46 AM CDT | Wind Advisory | ILX | 10 hr |
| Jun 6, 10:50 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 6, 12:13 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 6, 2:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 6, 3:46 PM CDT | Severe Thunderstorm Warning | ILX | 59 min |
| Jun 6, 4:03 PM CDT | Tornado Warning | ILX | 42 min |
| Jun 6, 4:32 PM CDT | Flash Flood Warning | ILX | 4 hr |
| Jun 7, 2:31 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 7, 2:42 AM CDT | Areal Flood Warning | ILX | 4 days |
| Jun 7, 5:38 AM CDT | Areal Flood Warning | ILX | 5 days |
| Jun 7, 10:41 AM CDT | Areal Flood Warning | ILX | 25 hr |
| Jun 8, 3:34 PM CDT | Flash Flood Watch | ILX | 38 hr |
| Jun 12, 3:15 PM CDT | Flash Flood Watch | ILX | 28 hr |
| Jun 13, 11:27 AM CDT | Severe Thunderstorm Warning | ILX | 63 min |
| Jun 13, 11:27 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 14, 4:28 AM CDT | Dense Fog Advisory | ILX | 5 hr |
| Jun 15, 11:42 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 4:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jun 25, 1:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 26, 1:23 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 27, 11:55 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 12:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 27, 3:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 27, 3:20 PM CDT | Severe Thunderstorm Warning | ILX | 55 min |
| Jun 27, 4:11 PM CDT | Severe Thunderstorm Warning | ILX | 64 min |
| Jul 8, 1:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 8, 1:54 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:45 PM CDT | Flash Flood Watch | ILX | 12 hr |
| Jul 8, 4:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 8, 5:09 PM CDT | Severe Thunderstorm Warning | ILX | 66 min |
| Jul 8, 5:41 PM CDT | Severe Thunderstorm Warning | ILX | 64 min |
| Jul 8, 6:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 8, 6:48 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Jul 12, 1:52 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 12, 3:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 12, 4:28 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 12, 4:52 PM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Jul 12, 5:19 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Jul 20, 12:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 2:10 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 21, 4:21 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 21, 7:20 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 8:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 21, 10:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 31, 2:19 AM CDT | Dense Fog Advisory | ILX | 7 hr |
| Aug 1, 4:04 AM CDT | Dense Fog Advisory | ILX | 5 hr |
| Aug 1, 5:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 2:33 PM CDT | Heat Advisory | ILX | 48 hr |
| Aug 5, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 7:09 PM CDT | Severe Thunderstorm Warning | ILX | 66 min |
| Aug 5, 7:42 PM CDT | Severe Thunderstorm Warning | ILX | 63 min |
| Aug 5, 7:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 8, 1:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 8, 7:04 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 8, 7:53 PM CDT | Tornado Warning | ILX | 37 min |
| Sep 12, 3:13 PM CDT | Flash Flood Watch | ILX | 4 days |
| Sep 12, 5:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 14, 7:33 AM CDT | Areal Flood Warning | ILX | 22 hr |
| Sep 16, 5:18 AM CDT | Dense Fog Advisory | ILX | 4 hr |
| Sep 29, 3:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Oct 25, 2:51 PM CDT | Wind Advisory | ILX | 30 hr |
| Oct 26, 3:47 AM CDT | Freeze Warning | ILX | 23 hr |
| Oct 27, 3:37 AM CDT | Freeze Warning | ILX | 29 hr |
| Nov 29, 2:46 PM CST | Winter Weather Advisory | ILX | 45 hr |
| Dec 6, 7:32 AM CST | Winter Weather Advisory | ILX | 3 hr |
| Dec 8, 3:10 AM CST | Winter Weather Advisory | ILX | 7 hr |
| Dec 14, 3:44 AM CST | Wind Advisory | ILX | 17 hr |
| Dec 14, 3:09 PM CST | Winter Weather Advisory | ILX | 18 hr |
| Dec 14, 11:47 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 15, 3:42 PM CST | Winter Weather Advisory | ILX | 32 hr |
| Dec 17, 3:13 PM CST | Freezing Rain Advisory | ILX | 40 hr |
| Dec 19, 8:00 AM CST | Dense Fog Advisory | ILX | 3 hr |
| Dec 20, 2:30 AM CST | Wind Chill Advisory | ILX | 55 hr |
| Dec 22, 3:37 PM CST | Winter Weather Advisory | ILX | 47 hr |
| Dec 22, 3:37 PM CST | Freezing Rain Advisory | ILX | 26 hr |
| Dec 23, 12:08 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 25, 3:42 PM CST | Flash Flood Watch | ILX | 50 hr |
| Dec 26, 11:42 AM CST | Dense Fog Advisory | ILX | 16 hr |
| Dec 27, 1:35 AM CST | Tornado Watch | SPC | 7 hr |
| Dec 27, 3:47 AM CST | Wind Advisory | ILX | 12 hr |
| Dec 27, 3:47 AM CST | Wind Advisory | ILX | 35 min |
| Dec 27, 10:26 AM CST | Mesoscale Discussion | SPC | 94 min |
| Dec 27, 10:58 AM CST | Tornado Watch | SPC | 8 hr |
| Dec 27, 12:15 PM CST | Severe Thunderstorm Warning | ILX | 60 min |
| Dec 27, 12:39 PM CST | Severe Thunderstorm Warning | ILX | 66 min |
| Dec 27, 12:57 PM CST | Severe Thunderstorm Warning | ILX | 63 min |
| Dec 27, 1:10 PM CST | Severe Thunderstorm Warning | ILX | 65 min |
| Dec 27, 1:35 PM CST | Severe Thunderstorm Warning | ILX | 25 min |
| Dec 27, 1:45 PM CST | Severe Thunderstorm Warning | ILX | 60 min |
| Dec 27, 1:54 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 27, 2:32 PM CST | Severe Thunderstorm Warning | ILX | 43 min |
| Dec 27, 3:21 PM CST | Severe Thunderstorm Warning | ILX | 24 min |
| Dec 30, 3:19 PM CST | Wind Advisory | ILX | 12 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 | 24 |
| Tornado Warning | 7 |
| Severe Thunderstorm Watch | 17 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 45 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 8 |
| Flood Watch | 4 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Freezing Rain Advisory | 2 |
| Snow Advisory | 1 |
| Snow and Blowing Snow Advisory | 1 |
| Winter Weather Advisory | 10 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 11 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.