Alert archive / Illinois / Mesoscale Discussions / 2021
Mesoscale Discussions in Illinois, April 2021
6 mesoscale discussions in April 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in April 2021. Tap one for its archive.
- Mesoscale Discussions
- 6
- Busiest day
- April 28, 20213 mesoscale discussions
Over time
By day
Days in UTC, the clock the archive keeps.
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 | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 5:04 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 13 more | 116 min |
| Apr 9, 4:56 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 19 more | 64 min |
| Apr 28, 12:33 PM CDT | Mesoscale Discussion | SPC | Alexander, Johnson, Massac, Pulaski, Union, Williamson | 57 min |
| Apr 28, 3:29 PM CDT | Mesoscale Discussion | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 91 min |
| Apr 28, 5:25 PM CDT | Mesoscale Discussion | SPC | Hardin, Massac, Pope | 2 hr |
| Apr 29, 3:14 AM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Massac County5
- Alexander County4
- Hardin County4
- Johnson County4
- Pope County4
- Pulaski County4
- Union County4
- Williamson County3
- Gallatin County2
- Saline County2
- Adams County1
- Brown County1
- Calhoun County1
- Cass County1
- Fulton County1
- Greene County1
- Hancock County1
- Henderson County1
- Jersey County1
- McDonough County1
- Macoupin County1
- Madison County1
- Monroe County1
- Morgan County1
- Pike County1
- Saint Clair County1
- Schuyler County1
- Scott County1
- Warren County1
- Clay County1
- Edwards County1
- Franklin County1
- Hamilton County1
- Jackson County1
- Jefferson County1
- Lawrence County1
- Marion County1
- Perry County1
- Randolph County1
- Richland County1
4 more counties
Nearby
Alerts in force nowTornadoes on recordThe 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.