Alert archive / Illinois / Livingston County
Weather alerts in Livingston County, Illinois, 2009
124 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 124
- Warnings
- 36
- Watches
- 27
- Advisories
- 41
- Busiest month
- June28 alerts
- Busiest day
- June 19, 20099 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 Livingston County in 2009 had a tornado report inside them.
Livingston County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 23 | 12 | 48% | 8 | 75% | 27 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 12 | 3 | 75% | 11 | 73% | 11 min |
| NWS Chicago, IL: severe thunderstorm warnings | 97 | 47 | 52% | 183 | 68% | 26 min |
| NWS Chicago, IL: flash flood warnings | 25 | 10 | 60% | 31 | 87% | 80 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 3, 9:25 PM CST | Dense Fog Advisory | LOT | 8 hr |
| Jan 6, 3:43 AM CST | Freezing Rain Advisory | LOT | 14 hr |
| Jan 8, 2:53 PM CST | Winter Weather Advisory | LOT | 51 hr |
| Jan 11, 10:49 AM CST | Areal Flood Advisory | LOT | 292 days |
| Jan 11, 11:07 AM CST | Areal Flood Advisory | LOT | 292 days |
| Jan 12, 4:21 AM CST | Winter Weather Advisory | LOT | 28 hr |
| Jan 12, 3:40 PM CST | Blizzard Watch | LOT | 19 hr |
| Jan 13, 2:07 PM CST | Wind Chill Watch | LOT | 13 hr |
| Jan 13, 3:02 PM CST | Winter Weather Advisory | LOT | 33 hr |
| Jan 13, 11:38 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 14, 3:23 AM CST | Wind Chill Warning | LOT | 57 hr |
| Jan 16, 8:56 AM CST | Areal Flood Advisory | LOT | 137 days |
| Jan 16, 3:08 PM CST | Wind Chill Advisory | LOT | 9 hr |
| Feb 10, 4:00 AM CST | Flood Watch | LOT | 41 hr |
| Feb 11, 1:31 AM CST | Dense Fog Advisory | LOT | 7 hr |
| Feb 11, 3:40 AM CST | Wind Advisory | LOT | 18 hr |
| Feb 20, 3:41 AM CST | Winter Weather Advisory | LOT | 41 hr |
| Feb 26, 3:50 AM CST | Dense Fog Advisory | LOT | 11 hr |
| Mar 6, 3:28 PM CST | Flash Flood Watch | LOT | 48 hr |
| Mar 8, 4:03 AM CDT | Areal Flood Warning | LOT | 30 hr |
| Mar 8, 7:11 AM CDT | Severe Thunderstorm Warning | LOT | 64 min |
| Mar 8, 9:13 AM CDT | Wind Advisory | LOT | 12 hr |
| Mar 8, 10:39 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 8, 1:06 PM CDT | Severe Thunderstorm Warning | LOT | 39 min |
| Mar 9, 3:39 AM CDT | Flash Flood Watch | LOT | 24 hr |
| Mar 10, 2:03 AM CDT | Areal Flood Warning | LOT | 36 hr |
| Mar 10, 3:37 AM CDT | Wind Advisory | LOT | 27 hr |
| Mar 24, 4:08 AM CDT | Wind Advisory | LOT | 16 hr |
| Mar 27, 12:58 PM CDT | Winter Storm Watch | LOT | 19 hr |
| Mar 28, 3:40 AM CDT | Winter Weather Advisory | LOT | 24 hr |
| Apr 5, 10:50 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 25, 5:32 PM CDT | Mesoscale Discussion | SPC | 73 min |
| Apr 26, 2:01 PM CDT | Areal Flood Advisory | LOT | 57 days |
| Apr 26, 2:17 PM CDT | Wind Advisory | LOT | 5 hr |
| Apr 28, 12:44 AM CDT | Areal Flood Advisory | LOT | 55 days |
| Apr 29, 3:10 PM CDT | Flash Flood Watch | LOT | 20 hr |
| Apr 30, 7:01 AM CDT | Areal Flood Advisory | LOT | 53 days |
| May 8, 8:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 13, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 13, 5:54 PM CDT | Severe Thunderstorm Warning | LOT | 34 min |
| May 13, 6:02 PM CDT | Tornado Watch | SPC | 5 hr |
| May 13, 8:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 13, 10:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| May 13, 10:51 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 13, 11:06 PM CDT | Flash Flood Warning | LOT | 5 hr |
| May 13, 11:13 PM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| May 13, 11:26 PM CDT | Severe Thunderstorm Warning | LOT | 34 min |
| May 14, 4:10 AM CDT | Areal Flood Warning | LOT | 3 hr |
| May 14, 3:34 PM CDT | Flash Flood Watch | LOT | 30 hr |
| May 15, 12:38 PM CDT | Wind Advisory | LOT | 2 hr |
| May 15, 2:05 PM CDT | Mesoscale Discussion | SPC | 25 min |
| May 15, 2:39 PM CDT | Tornado Watch | SPC | 7 hr |
| May 15, 2:48 PM CDT | Areal Flood Advisory | LOT | 57 days |
| May 15, 3:14 PM CDT | River Flood Warning | LOT | 18 hr |
| May 15, 5:46 PM CDT | Flash Flood Warning | LOT | 6 hr |
| May 15, 11:16 PM CDT | Areal Flood Warning | LOT | 12 hr |
| May 16, 11:27 AM CDT | Areal Flood Warning | LOT | 24 hr |
| May 30, 6:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 1, 1:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 1, 2:37 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 6:00 PM CDT | Severe Thunderstorm Warning | LOT | 60 min |
| Jun 1, 6:13 PM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| Jun 1, 6:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 8, 11:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 8, 3:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 18, 4:12 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 5:42 AM CDT | Severe Thunderstorm Warning | LOT | 67 min |
| Jun 18, 10:11 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 1:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 19, 7:14 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 1:08 PM CDT | Flash Flood Watch | LOT | 8 hr |
| Jun 19, 1:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 19, 2:24 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 5:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 19, 5:49 PM CDT | Severe Thunderstorm Warning | LOT | 41 min |
| Jun 19, 6:00 PM CDT | Severe Thunderstorm Warning | LOT | 32 min |
| Jun 19, 6:23 PM CDT | Severe Thunderstorm Warning | LOT | 52 min |
| Jun 19, 6:38 PM CDT | Severe Thunderstorm Warning | LOT | 67 min |
| Jun 19, 7:22 PM CDT | Severe Thunderstorm Warning | LOT | 38 min |
| Jun 19, 7:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 22, 3:15 PM CDT | Heat Advisory | LOT | 52 hr |
| Jun 25, 10:18 AM CDT | Heat Advisory | LOT | 9 hr |
| Jun 25, 12:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 3:57 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 27, 2:41 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 7:12 PM CDT | Severe Thunderstorm Warning | LOT | 32 min |
| Jul 24, 5:02 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 24, 9:58 PM CDT | Severe Thunderstorm Warning | LOT | 47 min |
| Jul 24, 10:43 PM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| Jul 24, 11:16 PM CDT | Severe Thunderstorm Warning | LOT | 59 min |
| Aug 4, 4:29 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Aug 4, 7:39 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 4, 9:14 AM CDT | Severe Thunderstorm Warning | LOT | 76 min |
| Aug 8, 4:07 AM CDT | Heat Advisory | LOT | 38 hr |
| Aug 17, 5:52 PM CDT | Severe Thunderstorm Warning | LOT | 53 min |
| Aug 19, 11:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 19, 12:49 PM CDT | Tornado Watch | SPC | 6 hr |
| Aug 19, 3:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 19, 3:31 PM CDT | Severe Thunderstorm Warning | LOT | 74 min |
| Aug 19, 4:01 PM CDT | Severe Thunderstorm Warning | LOT | 55 min |
| Aug 19, 4:37 PM CDT | Severe Thunderstorm Warning | LOT | 53 min |
| Aug 19, 5:08 PM CDT | Severe Thunderstorm Warning | LOT | 57 min |
| Aug 19, 5:19 PM CDT | Tornado Warning | LOT | 29 min |
| Aug 27, 8:46 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Sep 9, 9:19 PM CDT | Dense Fog Advisory | LOT | 12 hr |
| Sep 10, 8:44 PM CDT | Dense Fog Advisory | LOT | 11 hr |
| Sep 12, 4:08 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| Sep 12, 9:43 PM CDT | Dense Fog Advisory | LOT | 11 hr |
| Sep 26, 4:41 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| Sep 26, 2:56 PM CDT | Areal Flood Advisory | LOT | 2 hr |
| Sep 27, 5:55 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Sep 27, 5:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 27, 8:22 PM CDT | Tornado Watch | SPC | 3 hr |
| Oct 9, 4:00 PM CDT | Freeze Warning | LOT | 41 hr |
| Oct 29, 3:13 PM CDT | Flood Watch | LOT | 24 hr |
| Oct 31, 9:42 AM CDT | River Flood Warning | LOT | 34 hr |
| Nov 20, 9:38 PM CST | Dense Fog Advisory | LOT | 10 hr |
| Nov 23, 7:07 AM CST | Dense Fog Advisory | LOT | 3 hr |
| Nov 23, 9:40 PM CST | Dense Fog Advisory | LOT | 11 hr |
| Dec 9, 4:47 AM CST | Wind Advisory | LOT | 13 hr |
| Dec 22, 3:35 PM CST | Winter Weather Advisory | LOT | 29 hr |
| Dec 23, 3:45 AM CST | Flood Watch | LOT | 55 hr |
| Dec 24, 10:05 AM CST | River Flood Warning | LOT | 49 hr |
| Dec 27, 4:29 AM CST | Winter Weather Advisory | LOT | 10 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 | 23 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 20 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 2 |
| River Flood Warning | 3 |
| Flash Flood Watch | 5 |
| Flood Watch | 3 |
| Areal Flood Advisory | 9 |
| Winter | |
| Blizzard Watch | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.