Alert archive / Illinois / McLean County
Weather alerts in McLean County, Illinois, 2021
147 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
McLean County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 147
- Warnings
- 52
- Watches
- 12
- Advisories
- 40
- Busiest month
- June37 alerts
- Busiest day
- June 26, 202119 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 7 tornado warnings covering McLean County in 2021 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
McLean County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 7 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 24 | 12 | 50% | 11 | 45% | 21 min |
| Flash flood warnings | 10 | 4 | 60% | 12 | 92% | 105 min |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 54 | 15 | 72% | 47 | 51% | 17 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 130 | 49 | 62% | 213 | 54% | 22 min |
| NWS Lincoln, IL: flash flood warnings | 37 | 14 | 62% | 32 | 84% | 93 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 1, 1:08 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 1, 6:35 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 1, 6:01 PM CST | Winter Weather Advisory | ILX | 6 hr |
| Jan 2, 3:49 PM CST | Dense Fog Advisory | ILX | 18 hr |
| Jan 3, 2:38 PM CST | Dense Fog Advisory | ILX | 32 hr |
| Jan 5, 3:27 PM CST | Dense Fog Advisory | ILX | 17 hr |
| Jan 24, 3:06 PM CST | Winter Weather Advisory | ILX | 21 hr |
| Jan 25, 11:47 AM CST | Winter Weather Advisory | ILX | 24 hr |
| Jan 29, 2:48 PM CST | Winter Weather Advisory | ILX | 48 hr |
| Feb 3, 4:03 PM CST | Winter Weather Advisory | ILX | 38 hr |
| Feb 5, 2:01 PM CST | Wind Chill Advisory | ILX | 45 hr |
| Feb 5, 2:01 PM CST | Winter Weather Advisory | ILX | 33 hr |
| Feb 13, 3:15 AM CST | Wind Chill Advisory | ILX | 57 hr |
| Feb 13, 3:10 PM CST | Winter Weather Advisory | ILX | 60 hr |
| Feb 13, 8:35 PM CST | Wind Chill Warning | ILX | 39 hr |
| Feb 14, 2:38 AM CST | Winter Storm Warning | ILX | 48 hr |
| Feb 15, 2:52 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Mar 10, 3:08 AM CST | Wind Advisory | ILX | 21 hr |
| Mar 16, 12:22 AM CDT | Dense Fog Advisory | ILX | 10 hr |
| Mar 17, 3:16 PM CDT | Wind Advisory | ILX | 28 hr |
| Mar 25, 3:03 AM CDT | Wind Advisory | ILX | 22 hr |
| Apr 14, 2:36 PM CDT | Frost Advisory | ILX | 17 hr |
| Apr 19, 2:27 AM CDT | Freeze Watch | ILX | 12 hr |
| Apr 19, 2:27 PM CDT | Freeze Warning | ILX | 43 hr |
| Apr 21, 2:58 AM CDT | Freeze Warning | ILX | 29 hr |
| May 3, 2:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 3, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 5:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 7, 2:08 PM CDT | Frost Advisory | ILX | 18 hr |
| May 9, 2:48 PM CDT | Frost Advisory | ILX | 16 hr |
| May 11, 2:34 PM CDT | Frost Advisory | ILX | 16 hr |
| Jun 7, 7:51 PM CDT | Areal Flood Advisory | ILX | 114 min |
| Jun 12, 1:26 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 18, 9:20 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 12:52 AM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Jun 19, 1:19 AM CDT | Severe Thunderstorm Warning | ILX | 41 min |
| Jun 19, 1:23 AM CDT | Severe Thunderstorm Warning | ILX | 52 min |
| Jun 19, 2:10 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 2:19 AM CDT | Severe Thunderstorm Warning | ILX | 41 min |
| Jun 20, 10:57 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 12:49 PM CDT | Areal Flood Advisory | ILX | 3 hr |
| Jun 24, 2:28 PM CDT | Flash Flood Watch | ILX | 54 hr |
| Jun 25, 4:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 25, 5:06 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 7:33 PM CDT | Special Weather Statement | ILX | 42 min |
| Jun 25, 7:53 PM CDT | Severe Thunderstorm Warning | ILX | 67 min |
| Jun 25, 8:29 PM CDT | Tornado Warning | ILX | 30 min |
| Jun 25, 8:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 25, 8:49 PM CDT | Severe Thunderstorm Warning | ILX | 41 min |
| Jun 25, 8:54 PM CDT | Flash Flood Warning | ILX | 6 hr |
| Jun 25, 9:59 PM CDT | Flash Flood Warning | ILX | 5 hr |
| Jun 25, 10:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 26, 2:34 AM CDT | Areal Flood Warning | ILX | 61 hr |
| Jun 26, 11:45 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 12:05 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 26, 12:21 PM CDT | Tornado Warning | ILX | 24 min |
| Jun 26, 2:38 PM CDT | Tornado Warning | ILX | 37 min |
| Jun 26, 2:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 26, 3:12 PM CDT | Tornado Warning | ILX | 33 min |
| Jun 26, 3:25 PM CDT | Flash Flood Warning | ILX | 4 hr |
| Jun 26, 3:37 PM CDT | Tornado Warning | ILX | 23 min |
| Jun 26, 4:43 PM CDT | Severe Thunderstorm Warning | ILX | 32 min |
| Jun 26, 5:16 PM CDT | Severe Thunderstorm Warning | ILX | 44 min |
| Jun 27, 11:36 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 3:13 AM CDT | Flash Flood Watch | ILX | 40 hr |
| Jun 28, 12:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 9:49 PM CDT | River Flood Warning | ILX | 12 hr |
| Jun 29, 5:31 PM CDT | Special Weather Statement | ILX | 44 min |
| Jul 7, 2:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 10, 3:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 15, 1:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 4:43 PM CDT | Areal Flood Advisory | ILX | 3 hr |
| Jul 15, 4:52 PM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Jul 15, 5:01 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Jul 16, 7:04 AM CDT | Flash Flood Warning | ILX | 4 hr |
| Jul 16, 9:41 AM CDT | Flash Flood Warning | ILX | 4 hr |
| Jul 16, 1:35 PM CDT | Areal Flood Warning | ILX | 24 hr |
| Jul 24, 3:32 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 5:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 24, 7:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 27, 2:06 AM CDT | Heat Advisory | ILX | 66 hr |
| Jul 29, 2:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 1, 1:03 AM CDT | Dense Fog Advisory | ILX | 7 hr |
| Aug 6, 3:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Aug 8, 2:21 PM CDT | Special Weather Statement | ILX | 24 min |
| Aug 8, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 3:30 PM CDT | Special Weather Statement | ILX | 30 min |
| Aug 8, 4:45 PM CDT | Areal Flood Advisory | ILX | 2 hr |
| Aug 8, 5:14 PM CDT | Severe Thunderstorm Warning | ILX | 46 min |
| Aug 8, 5:35 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Aug 8, 7:20 PM CDT | Areal Flood Advisory | ILX | 115 min |
| Aug 9, 1:54 PM CDT | Heat Advisory | ILX | 29 hr |
| Aug 10, 3:49 PM CDT | Heat Advisory | ILX | 27 hr |
| Aug 11, 1:20 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 12, 2:59 AM CDT | Special Weather Statement | ILX | 46 min |
| Aug 12, 3:14 AM CDT | Severe Thunderstorm Warning | ILX | 31 min |
| Aug 12, 3:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 12, 3:51 AM CDT | Special Weather Statement | ILX | 24 min |
| Aug 12, 4:26 AM CDT | Severe Thunderstorm Warning | ILX | 21 min |
| Aug 12, 8:12 AM CDT | Special Weather Statement | ILX | 48 min |
| Aug 12, 9:13 AM CDT | Severe Thunderstorm Warning | ILX | 47 min |
| Aug 12, 9:24 AM CDT | Areal Flood Advisory | ILX | 3 hr |
| Aug 12, 10:04 AM CDT | Flash Flood Warning | ILX | 5 hr |
| Aug 12, 3:01 PM CDT | Areal Flood Warning | ILX | 6 hr |
| Aug 23, 2:53 PM CDT | Heat Advisory | ILX | 5 days |
| Aug 24, 8:43 PM CDT | Severe Thunderstorm Warning | ILX | 47 min |
| Aug 24, 9:10 PM CDT | Special Weather Statement | ILX | 50 min |
| Aug 25, 4:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 29, 1:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Sep 7, 1:12 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 7, 3:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 7, 4:22 PM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Sep 7, 4:58 PM CDT | Severe Thunderstorm Warning | ILX | 47 min |
| Sep 7, 4:58 PM CDT | Severe Thunderstorm Warning | ILX | 47 min |
| Sep 7, 5:39 PM CDT | Severe Thunderstorm Warning | ILX | 36 min |
| Sep 14, 3:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 21, 12:03 AM CDT | Special Weather Statement | ILX | 57 min |
| Oct 7, 8:41 PM CDT | Dense Fog Advisory | ILX | 13 hr |
| Oct 8, 9:45 PM CDT | Dense Fog Advisory | ILX | 6 hr |
| Oct 11, 9:06 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 11, 3:10 PM CDT | Tornado Watch | SPC | 6 hr |
| Oct 11, 5:03 PM CDT | Severe Thunderstorm Warning | ILX | 42 min |
| Oct 11, 5:14 PM CDT | Severe Thunderstorm Warning | ILX | 61 min |
| Oct 11, 5:42 PM CDT | Severe Thunderstorm Warning | ILX | 63 min |
| Oct 23, 12:50 PM CDT | Flash Flood Watch | ILX | 56 hr |
| Oct 24, 5:11 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 24, 5:39 PM CDT | Special Weather Statement | ILX | 51 min |
| Oct 24, 6:26 PM CDT | Severe Thunderstorm Warning | ILX | 34 min |
| Oct 24, 7:04 PM CDT | Severe Thunderstorm Warning | ILX | 41 min |
| Oct 24, 7:08 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Oct 24, 7:48 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Oct 24, 8:37 PM CDT | River Flood Warning | ILX | 14 hr |
| Oct 25, 3:18 AM CDT | Wind Advisory | ILX | 10 hr |
| Nov 1, 2:41 PM CDT | Freeze Warning | ILX | 18 hr |
| Nov 10, 2:35 AM CST | Dense Fog Advisory | ILX | 6 hr |
| Dec 10, 12:19 AM CST | Dense Fog Advisory | ILX | 11 hr |
| Dec 10, 2:57 AM CST | Wind Advisory | ILX | 36 hr |
| Dec 10, 7:18 PM CST | Mesoscale Discussion | SPC | 87 min |
| Dec 10, 7:47 PM CST | Tornado Watch | SPC | 8 hr |
| Dec 10, 8:38 PM CST | Tornado Warning | ILX | 22 min |
| Dec 10, 8:50 PM CST | Tornado Warning | ILX | 12 min |
| Dec 10, 8:53 PM CST | Mesoscale Discussion | SPC | 97 min |
| Dec 10, 8:58 PM CST | Severe Thunderstorm Warning | ILX | 47 min |
| Dec 14, 2:47 PM CST | Wind Advisory | ILX | 37 hr |
| Dec 15, 8:27 PM CST | High Wind Warning | ILX | 7 hr |
| Dec 26, 1:13 AM CST | Dense Fog Advisory | ILX | 11 hr |
| Dec 30, 9:28 PM CST | Dense Fog Advisory | ILX | 13 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 | 5 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 10 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 10 |
| River Flood Warning | 2 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.