Alert archive / Illinois / McLean County
Weather alerts in McLean County, Illinois, 2017
113 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 113
- Warnings
- 22
- Watches
- 15
- Advisories
- 33
- Busiest month
- July16 alerts
- Busiest day
- May 26, 20175 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering McLean County in 2017 had a tornado report inside them.
McLean County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 12 | 7 | 42% | 14 | 93% | 14 min |
| Flash flood warnings | 5 | 3 | 40% | 3 | 100% | 73 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 23 | 3 | 87% | 21 | 29% | 11 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 168 | 92 | 45% | 378 | 75% | 19 min |
| NWS Lincoln, IL: flash flood warnings | 31 | 10 | 68% | 26 | 81% | 142 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 2, 4:59 PM CST | Dense Fog Advisory | ILX | 15 hr |
| Jan 10, 3:43 AM CST | Wind Advisory | ILX | 17 hr |
| Jan 11, 11:53 AM CST | Dense Fog Advisory | ILX | 9 hr |
| Jan 11, 7:36 PM CST | Special Weather Statement | ILX | 39 min |
| Jan 12, 3:05 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 4:00 AM CST | Freezing Rain Advisory | ILX | 5 hr |
| Jan 12, 4:13 AM CST | Winter Storm Watch | ILX | 59 hr |
| Jan 13, 4:17 AM CST | Freezing Rain Advisory | ILX | 56 hr |
| Jan 14, 3:19 PM CST | Winter Weather Advisory | ILX | 42 hr |
| Jan 15, 10:45 PM CST | Dense Fog Advisory | ILX | 13 hr |
| Jan 16, 12:04 PM CST | Dense Fog Advisory | ILX | 17 hr |
| Jan 19, 3:08 PM CST | Dense Fog Advisory | ILX | 19 hr |
| Jan 22, 1:41 AM CST | Dense Fog Advisory | ILX | 9 hr |
| Feb 6, 4:56 PM CST | Dense Fog Advisory | ILX | 13 hr |
| Feb 6, 11:20 PM CST | Mesoscale Discussion | SPC | 115 min |
| Feb 8, 3:27 AM CST | Winter Weather Advisory | ILX | 15 hr |
| Feb 19, 1:00 AM CST | Dense Fog Advisory | ILX | 10 hr |
| Feb 19, 10:08 PM CST | Dense Fog Advisory | ILX | 11 hr |
| Feb 21, 10:51 PM CST | Dense Fog Advisory | ILX | 12 hr |
| Feb 23, 4:25 AM CST | Dense Fog Advisory | ILX | 6 hr |
| Feb 28, 2:03 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 28, 2:57 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 28, 5:24 PM CST | Mesoscale Discussion | SPC | 96 min |
| Feb 28, 8:06 PM CST | Mesoscale Discussion | SPC | 84 min |
| Feb 28, 9:51 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 28, 10:32 PM CST | Special Weather Statement | ILX | 28 min |
| Feb 28, 10:44 PM CST | Severe Thunderstorm Warning | ILX | 46 min |
| Mar 6, 10:15 PM CST | Mesoscale Discussion | SPC | 60 min |
| Mar 6, 10:35 PM CST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 7, 12:03 AM CST | Tornado Warning | ILX | 27 min |
| Mar 7, 12:21 AM CST | Severe Thunderstorm Warning | ILX | 54 min |
| Mar 8, 3:50 AM CST | Wind Advisory | ILX | 14 hr |
| Mar 8, 10:44 AM CST | Red Flag Warning | ILX | 6 hr |
| Mar 12, 3:37 AM CDT | Winter Weather Advisory | ILX | 35 hr |
| Mar 20, 3:10 AM CDT | Severe Thunderstorm Warning | ILX | 50 min |
| Apr 10, 11:57 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 10, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 10, 3:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 6:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 14, 5:23 PM CDT | Special Weather Statement | ILX | 22 min |
| Apr 27, 2:41 PM CDT | Flash Flood Watch | ILX | 5 days |
| Apr 28, 10:52 AM CDT | River Flood Warning | ILX | 5 days |
| Apr 29, 6:14 PM CDT | Severe Thunderstorm Warning | ILX | 46 min |
| May 10, 12:05 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 12:59 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 10, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 10, 6:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 10, 7:36 PM CDT | Special Weather Statement | ILX | 39 min |
| May 17, 4:18 AM CDT | Wind Advisory | ILX | 21 hr |
| May 26, 1:25 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 26, 2:45 PM CDT | Tornado Watch | SPC | 5 hr |
| May 26, 3:11 PM CDT | Severe Thunderstorm Warning | ILX | 23 min |
| May 26, 4:05 PM CDT | Severe Thunderstorm Warning | ILX | 40 min |
| May 26, 4:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 14, 12:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 14, 4:30 PM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Jun 17, 5:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 8:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 17, 8:54 PM CDT | Severe Thunderstorm Warning | ILX | 51 min |
| Jun 17, 9:10 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Jun 17, 11:55 PM CDT | Areal Flood Warning | ILX | 12 hr |
| Jun 19, 12:44 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 19, 6:56 PM CDT | Special Weather Statement | ILX | 49 min |
| Jun 20, 2:05 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 7:23 PM CDT | Special Weather Statement | ILX | 22 min |
| Jul 4, 12:16 PM CDT | Special Weather Statement | ILX | 29 min |
| Jul 4, 2:55 PM CDT | Special Weather Statement | ILX | 35 min |
| Jul 10, 6:46 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 10, 2:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 10, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 6:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 10, 8:02 PM CDT | Severe Thunderstorm Warning | ILX | 43 min |
| Jul 10, 8:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 8:54 AM CDT | Severe Thunderstorm Warning | ILX | 51 min |
| Jul 12, 3:36 AM CDT | Heat Advisory | ILX | 15 hr |
| Jul 12, 3:21 PM CDT | Flash Flood Watch | ILX | 11 hr |
| Jul 16, 2:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 17, 3:11 PM CDT | Excessive Heat Watch | ILX | 24 hr |
| Jul 18, 3:07 PM CDT | Heat Advisory | ILX | 4 days |
| Jul 23, 1:03 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 4:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Aug 1, 12:37 PM CDT | Special Weather Statement | ILX | 3 hr |
| Aug 1, 4:32 PM CDT | Flash Flood Warning | ILX | 4 hr |
| Aug 3, 2:15 PM CDT | Special Weather Statement | ILX | 45 min |
| Aug 3, 5:18 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 6:48 PM CDT | Severe Thunderstorm Warning | ILX | 57 min |
| Aug 22, 4:34 AM CDT | Areal Flood Advisory | ILX | 3 hr |
| Aug 28, 3:19 PM CDT | Special Weather Statement | ILX | 41 min |
| Aug 28, 6:33 PM CDT | Special Weather Statement | ILX | 57 min |
| Aug 28, 11:07 PM CDT | Dense Fog Advisory | ILX | 11 hr |
| Aug 30, 4:37 AM CDT | Dense Fog Advisory | ILX | 4 hr |
| Sep 4, 3:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 14, 1:09 AM CDT | Dense Fog Advisory | ILX | 9 hr |
| Oct 9, 7:47 AM CDT | Dense Fog Advisory | ILX | 3 hr |
| Oct 14, 5:09 PM CDT | Tornado Watch | SPC | 8 hr |
| Oct 14, 6:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Oct 14, 8:14 PM CDT | Severe Thunderstorm Warning | ILX | 33 min |
| Oct 14, 9:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Oct 25, 3:16 AM CDT | Frost Advisory | ILX | 29 hr |
| Oct 27, 3:24 AM CDT | Freeze Watch | ILX | 12 hr |
| Oct 27, 2:56 PM CDT | Freeze Warning | ILX | 42 hr |
| Nov 5, 3:58 AM CST | Dense Fog Advisory | ILX | 6 hr |
| Nov 5, 6:04 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 18, 5:29 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Nov 18, 7:20 AM CST | Special Weather Statement | ILX | 40 min |
| Nov 18, 8:20 AM CST | Flash Flood Warning | ILX | 6 hr |
| Nov 18, 8:52 AM CST | Flash Flood Warning | ILX | 6 hr |
| Nov 18, 8:59 AM CST | Flash Flood Warning | ILX | 6 hr |
| Dec 13, 10:58 AM CST | Wind Advisory | ILX | 10 hr |
| Dec 23, 3:39 AM CST | Winter Weather Advisory | ILX | 38 hr |
| Dec 26, 3:56 AM CST | Wind Chill Advisory | ILX | 30 hr |
| Dec 28, 3:18 PM CST | Winter Weather Advisory | ILX | 31 hr |
| Dec 29, 3:00 PM CST | Wind Chill Advisory | ILX | 4 days |
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 archive20162018
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.