Alert archive / Illinois / Livingston County
Weather alerts in Livingston County, Illinois, 2011
150 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 150
- Warnings
- 32
- Watches
- 24
- Advisories
- 39
- Busiest month
- May40 alerts
- Busiest day
- May 25, 20118 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 4 tornado warnings covering Livingston County in 2011 had a tornado report inside them.
Livingston County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 23 | 14 | 39% | 8 | 50% | 24 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 25 | 5 | 80% | 16 | 25% | 12 min |
| NWS Chicago, IL: severe thunderstorm warnings | 177 | 94 | 47% | 506 | 76% | 32 min |
| NWS Chicago, IL: flash flood warnings | 30 | 8 | 73% | 19 | 68% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 10, 3:29 AM CST | Winter Weather Advisory | LOT | 41 hr |
| Jan 19, 2:50 PM CST | Wind Chill Advisory | LOT | 44 hr |
| Jan 24, 2:20 AM CST | Freezing Rain Advisory | LOT | 9 hr |
| Jan 30, 5:26 AM CST | Winter Storm Watch | LOT | 6 hr |
| Jan 30, 11:34 AM CST | Blizzard Watch | LOT | 28 hr |
| Jan 31, 3:20 PM CST | Blizzard Warning | LOT | 48 hr |
| Feb 1, 3:36 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 4:31 AM CST | Wind Chill Watch | LOT | 11 hr |
| Feb 2, 3:26 PM CST | Wind Chill Advisory | LOT | 19 hr |
| Feb 9, 3:09 PM CST | Wind Chill Advisory | LOT | 19 hr |
| Feb 23, 3:14 PM CST | Winter Storm Watch | LOT | 13 hr |
| Feb 24, 4:12 AM CST | Winter Storm Warning | LOT | 27 hr |
| Feb 24, 4:12 AM CST | Winter Weather Advisory | LOT | 27 hr |
| Feb 24, 5:20 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 27, 3:37 PM CST | Winter Weather Advisory | LOT | 12 hr |
| Feb 27, 9:20 PM CST | Areal Flood Advisory | LOT | 5 hr |
| Apr 3, 12:21 PM CDT | Wind Advisory | LOT | 6 hr |
| Apr 4, 12:42 AM CDT | Special Weather Statement | LOT | 63 min |
| Apr 4, 1:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 10, 6:05 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 10:49 PM CDT | Special Weather Statement | LOT | 56 min |
| Apr 10, 11:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 11, 12:21 AM CDT | Severe Thunderstorm Warning | LOT | 39 min |
| Apr 15, 4:12 AM CDT | Wind Advisory | LOT | 16 hr |
| Apr 22, 1:43 PM CDT | Areal Flood Warning | LOT | 8 hr |
| May 7, 2:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 7, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 7, 3:28 PM CDT | Severe Thunderstorm Warning | LOT | 32 min |
| May 11, 2:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 11, 3:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 5:43 PM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| May 11, 5:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 13, 4:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 14, 11:15 AM CDT | Areal Flood Advisory | LOT | 4 hr |
| May 16, 3:11 PM CDT | Frost Advisory | LOT | 16 hr |
| May 19, 5:20 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| May 22, 4:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 2:04 PM CDT | Tornado Watch | SPC | 9 hr |
| May 22, 2:26 PM CDT | Severe Thunderstorm Warning | LOT | 34 min |
| May 22, 3:00 PM CDT | Severe Thunderstorm Warning | LOT | 60 min |
| May 22, 3:28 PM CDT | Severe Thunderstorm Warning | LOT | 77 min |
| May 22, 4:31 PM CDT | Flash Flood Warning | LOT | 3 hr |
| May 22, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 22, 9:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| May 24, 1:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 25, 4:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 25, 5:46 AM CDT | Tornado Watch | SPC | 7 hr |
| May 25, 7:09 AM CDT | Special Weather Statement | LOT | 36 min |
| May 25, 8:24 AM CDT | Severe Thunderstorm Warning | LOT | 66 min |
| May 25, 1:57 PM CDT | Flash Flood Watch | LOT | 9 hr |
| May 25, 2:31 PM CDT | Tornado Watch | SPC | 7 hr |
| May 25, 5:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 25, 6:27 PM CDT | Tornado Warning | LOT | 24 min |
| May 25, 7:01 PM CDT | Severe Thunderstorm Warning | LOT | 59 min |
| May 25, 7:06 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| May 29, 8:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| May 29, 8:53 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 11:13 AM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| May 29, 11:51 AM CDT | Areal Flood Advisory | LOT | 4 hr |
| May 29, 11:58 AM CDT | Severe Thunderstorm Warning | LOT | 77 min |
| May 29, 11:59 AM CDT | Mesoscale Discussion | SPC | 61 min |
| May 29, 12:32 PM CDT | Tornado Warning | LOT | 43 min |
| May 29, 12:43 PM CDT | Severe Thunderstorm Warning | LOT | 77 min |
| May 31, 12:59 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 31, 2:33 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 4, 1:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 4, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 4, 7:42 PM CDT | Severe Thunderstorm Warning | LOT | 48 min |
| Jun 9, 5:46 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 9, 7:53 AM CDT | Special Weather Statement | LOT | 37 min |
| Jun 9, 5:00 PM CDT | Severe Thunderstorm Warning | LOT | 60 min |
| Jun 15, 2:53 AM CDT | Severe Thunderstorm Warning | LOT | 37 min |
| Jun 15, 4:35 AM CDT | Areal Flood Advisory | LOT | 5 hr |
| Jun 20, 4:08 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 20, 5:43 AM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| Jun 20, 6:29 AM CDT | Areal Flood Advisory | LOT | 6 hr |
| Jun 21, 11:45 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 21, 4:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 21, 5:42 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 21, 6:37 PM CDT | Severe Thunderstorm Warning | LOT | 68 min |
| Jun 21, 6:44 PM CDT | Special Weather Statement | LOT | 31 min |
| Jun 21, 6:47 PM CDT | Special Weather Statement | LOT | 28 min |
| Jun 21, 7:17 PM CDT | Special Weather Statement | LOT | |
| Jun 21, 7:27 PM CDT | Tornado Warning | LOT | 33 min |
| Jun 27, 12:05 AM CDT | Special Weather Statement | LOT | 55 min |
| Jun 27, 4:16 AM CDT | Special Weather Statement | LOT | 44 min |
| Jun 30, 10:59 AM CDT | Heat Advisory | LOT | 34 hr |
| Jul 1, 7:02 AM CDT | Severe Thunderstorm Warning | LOT | 28 min |
| Jul 2, 1:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 2, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 2:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 4:17 AM CDT | Heat Advisory | LOT | 15 hr |
| Jul 11, 7:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 11, 7:50 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 11, 5:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 17, 3:38 AM CDT | Heat Advisory | LOT | 16 hr |
| Jul 17, 3:40 PM CDT | Heat Advisory | LOT | 60 hr |
| Jul 19, 2:26 AM CDT | Excessive Heat Watch | LOT | 14 hr |
| Jul 19, 2:26 AM CDT | Excessive Heat Warning | LOT | 5 days |
| Jul 21, 4:06 AM CDT | Excessive Heat Watch | LOT | 24 hr |
| Jul 22, 3:50 AM CDT | Excessive Heat Watch | LOT | 24 hr |
| Jul 22, 7:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 23, 2:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 24, 6:44 AM CDT | Severe Thunderstorm Warning | LOT | 47 min |
| Jul 24, 8:16 AM CDT | Severe Thunderstorm Warning | LOT | 59 min |
| Jul 26, 1:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 27, 12:12 PM CDT | Heat Advisory | LOT | 7 hr |
| Jul 28, 4:04 AM CDT | Heat Advisory | LOT | 17 hr |
| Jul 29, 6:36 AM CDT | Special Weather Statement | LOT | 54 min |
| Jul 29, 7:31 AM CDT | Special Weather Statement | LOT | 29 min |
| Aug 1, 3:32 AM CDT | Heat Advisory | LOT | 16 hr |
| Aug 2, 3:38 AM CDT | Heat Advisory | LOT | 20 hr |
| Aug 2, 5:22 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 2, 8:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 2, 11:15 PM CDT | Severe Thunderstorm Warning | LOT | 41 min |
| Aug 8, 5:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 8, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 8, 6:12 PM CDT | Special Weather Statement | LOT | 63 min |
| Aug 8, 7:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 8, 7:29 PM CDT | Tornado Warning | LOT | 34 min |
| Aug 13, 11:45 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Aug 13, 12:12 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 13, 3:32 PM CDT | Special Weather Statement | LOT | 28 min |
| Aug 13, 3:35 PM CDT | Special Weather Statement | LOT | 25 min |
| Aug 13, 4:01 PM CDT | Special Weather Statement | LOT | 44 min |
| Aug 17, 3:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 23, 10:32 AM CDT | Special Weather Statement | LOT | 43 min |
| Aug 24, 3:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 24, 6:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 2, 4:02 AM CDT | Heat Advisory | LOT | 15 hr |
| Sep 3, 12:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Sep 3, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 3, 3:44 PM CDT | Severe Thunderstorm Warning | LOT | 28 min |
| Sep 3, 5:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Sep 3, 5:12 PM CDT | Special Weather Statement | LOT | 33 min |
| Sep 19, 11:13 PM CDT | Dense Fog Advisory | LOT | 11 hr |
| Sep 26, 4:46 AM CDT | Areal Flood Advisory | LOT | 6 hr |
| Sep 26, 8:15 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Sep 28, 3:37 PM CDT | Wind Advisory | LOT | 45 hr |
| Oct 1, 3:48 PM CDT | Frost Advisory | LOT | 16 hr |
| Oct 19, 3:56 AM CDT | Wind Advisory | LOT | 24 hr |
| Oct 20, 3:46 AM CDT | Frost Advisory | LOT | 29 hr |
| Oct 21, 2:01 PM CDT | Frost Advisory | LOT | 18 hr |
| Oct 27, 2:48 PM CDT | Frost Advisory | LOT | 16 hr |
| Oct 28, 3:42 PM CDT | Freeze Warning | LOT | 17 hr |
| Nov 9, 12:27 PM CST | Wind Advisory | LOT | 4 hr |
| Nov 12, 4:08 PM CST | Wind Advisory | LOT | 26 hr |
| Nov 18, 10:20 AM CST | Wind Advisory | LOT | 7 hr |
| Nov 18, 11:10 AM CST | Red Flag Warning | LOT | 6 hr |
| Dec 20, 9:57 PM CST | Dense Fog Advisory | LOT | 12 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 archive20102012
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.