Alert archive / South Dakota / Mesoscale Discussions / 2021
Mesoscale Discussions in South Dakota, May 2021
13 mesoscale discussions in May 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 May 2021. Tap one for its archive.
- Mesoscale Discussions
- 13
- Busiest day
- May 23, 20214 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 |
|---|---|---|---|---|
| May 13, 2:38 PM CDT | Mesoscale Discussion | SPC | Fall River | 3 hr |
| May 14, 4:58 PM CDT | Mesoscale Discussion | SPC | Brookings, Clay, Codington, Davison, Deuel, Douglas and 15 more | 92 min |
| May 20, 1:58 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Fall River, Lawrence | 3 hr |
| May 21, 3:54 PM CDT | Mesoscale Discussion | SPC | Bennett | 3 hr |
| May 21, 7:30 PM CDT | Mesoscale Discussion | SPC | Bennett, Oglala Lakota, Todd | 90 min |
| May 21, 10:04 PM CDT | Mesoscale Discussion | SPC | Fall River, Haakon, Jackson, Oglala Lakota | 86 min |
| May 23, 11:53 AM CDT | Mesoscale Discussion | SPC | Fall River | 2 hr |
| May 23, 1:58 PM CDT | Mesoscale Discussion | SPC | Haakon, Meade, Oglala Lakota, Pennington, Perkins, Ziebach | 2 hr |
| May 23, 2:57 PM CDT | Mesoscale Discussion | SPC | Fall River | 2 hr |
| May 23, 6:25 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Corson, Custer, Dewey, Fall River and 9 more | 95 min |
| May 23, 7:53 PM CDT | Mesoscale Discussion | SPC | Bennett | 67 min |
| May 23, 8:22 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson, Dewey, Potter, Stanley, Sully and 1 more | 53 min |
| May 23, 9:56 PM CDT | Mesoscale Discussion | SPC | Tripp | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fall River County6
- Bennett County4
- Oglala Lakota County4
- Haakon County3
- Butte County2
- Custer County2
- Lawrence County2
- Jackson County2
- Meade County2
- Pennington County2
- Perkins County2
- Ziebach County2
- Corson County2
- Dewey County2
- Brookings County1
- Clay County1
- Codington County1
- Davison County1
- Deuel County1
- Douglas County1
- Grant County1
- Hamlin County1
- Hanson County1
- Hutchinson County1
- Kingsbury County1
- Lake County1
- Lincoln County1
- McCook County1
- Miner County1
- Minnehaha County1
- Moody County1
- Roberts County1
- Turner County1
- Union County1
- Yankton County1
- Todd County1
- Harding County1
- Campbell County1
- Potter County1
- Stanley County1
3 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. Warning verification from the Mesonet's Cow. Rebuilt daily.