Alert archive / Illinois / Williamson County / Mesoscale Discussions
Mesoscale Discussions in Williamson County, Illinois, 2021
30 mesoscale discussions in 2021. An alert counts here when it covered this county. The archive of mesoscale discussions reaches back to 2003.
Williamson County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Mesoscale Discussions
- 30
- Busiest month
- May6 mesoscale discussions
- Busiest day
- July 10, 20214 mesoscale discussions
Over time
By month
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 |
|---|---|---|---|
| Feb 10, 11:18 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 15, 10:44 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Mar 11, 1:26 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Mar 25, 2:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Mar 27, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 9, 4:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 28, 12:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 29, 3:14 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 4, 1:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| May 6, 10:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| May 6, 12:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 27, 2:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 27, 3:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 27, 5:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 25, 12:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 12:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 10, 1:01 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 10, 3:09 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 1:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 5:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 12, 1:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Aug 8, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 10, 2:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 7:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 12, 9:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Oct 24, 10:33 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Dec 5, 8:06 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 5, 11:28 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 10, 4:45 PM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 10, 11:28 PM CST | Mesoscale Discussion | SPC | 92 min |
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. Rebuilt daily.