Alert archive / South Dakota / Mesoscale Discussions
Mesoscale Discussions in South Dakota, 2021
126 mesoscale discussions in 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 2021. Tap one for its archive.
- Mesoscale Discussions
- 126
- Busiest month
- August35 mesoscale discussions
- Busiest day
- June 11, 20215 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 | Counties | Lasted |
|---|---|---|---|---|
| Jan 14, 8:44 PM CST | Mesoscale Discussion | SPC | Brookings, Clay, Codington, Deuel, Hamlin, Kingsbury and 7 more | 5 hr |
| Mar 10, 1:12 AM CST | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Haakon, Jackson, Oglala Lakota and 1 more | 6 hr |
| Mar 14, 3:55 AM CDT | Mesoscale Discussion | SPC | Fall River | 6 hr |
| Mar 14, 12:40 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Jackson, Mellette, Oglala Lakota and 2 more | 4 hr |
| Mar 14, 6:20 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bennett, Bon Homme, Brookings, Brule and 52 more | 6 hr |
| Mar 15, 1:50 AM CDT | Mesoscale Discussion | SPC | Brookings, Clark, Codington, Deuel, Hamlin, Hanson and 9 more | 6 hr |
| Apr 5, 6:21 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Clay, Hutchinson, Lincoln, McCook, Minnehaha and 4 more | 114 min |
| 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 |
| Jun 5, 11:47 PM CDT | Mesoscale Discussion | SPC | Harding | 88 min |
| Jun 7, 3:49 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Haakon, Jackson, Meade and 2 more | 116 min |
| Jun 7, 5:08 PM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Edmunds, Faulk, McPherson, Potter and 1 more | 97 min |
| Jun 7, 8:35 PM CDT | Mesoscale Discussion | SPC | Campbell | 85 min |
| Jun 8, 1:06 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson | 84 min |
| Jun 8, 3:24 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Custer, Haakon, Harding, Jackson and 6 more | 96 min |
| Jun 8, 7:37 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Fall River, Lawrence, Meade, Pennington | 83 min |
| Jun 8, 9:50 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Harding, Lawrence, Meade, Pennington and 1 more | 85 min |
| Jun 8, 11:41 PM CDT | Mesoscale Discussion | SPC | Corson, Dewey, Haakon, Jackson, Oglala Lakota, Ziebach | 94 min |
| Jun 10, 3:51 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Custer, Fall River, Haakon, Harding and 7 more | 114 min |
| Jun 10, 8:28 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Corson, Custer, Dewey, Fall River and 17 more | 92 min |
| Jun 10, 11:07 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Corson, Custer, Dewey, Fall River and 8 more | 83 min |
| Jun 10, 11:50 PM CDT | Mesoscale Discussion | SPC | Dewey, Haakon, Jackson, Jones, Meade, Mellette and 5 more | 85 min |
| Jun 11, 12:52 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brookings, Brown, Brule and 35 more | 53 min |
| Jun 11, 4:37 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Brown, Charles Mix, Clark and 21 more | 83 min |
| Jun 13, 2:16 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence, Oglala Lakota, Pennington | 89 min |
| Jun 14, 2:24 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence | 3 hr |
| Jun 19, 4:58 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Fall River, Harding, Lawrence, Meade and 2 more | 92 min |
| Jun 22, 3:41 PM CDT | Mesoscale Discussion | SPC | Union | 2 hr |
| Jun 23, 6:13 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Clay, Union, Yankton | 92 min |
| Jun 23, 8:10 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Charles Mix, Clay, Davison, Douglas, Gregory and 5 more | 95 min |
| Jun 24, 3:37 PM CDT | Mesoscale Discussion | SPC | Lawrence | 83 min |
| Jul 3, 3:34 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson, Dewey, Perkins, Ziebach | 116 min |
| Jul 3, 6:33 PM CDT | Mesoscale Discussion | SPC | Bennett, Brule, Haakon, Hughes, Jackson, Jones and 7 more | 87 min |
| Jul 4, 7:11 PM CDT | Mesoscale Discussion | SPC | Harding | 2 hr |
| Jul 5, 1:34 PM CDT | Mesoscale Discussion | SPC | Aurora, Bennett, Brule, Buffalo, Butte, Charles Mix and 24 more | 116 min |
| Jul 5, 5:44 PM CDT | Mesoscale Discussion | SPC | Clay, Lincoln, Turner, Union, Yankton | 2 hr |
| Jul 6, 1:06 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Brookings, Charles Mix, Clay, Davison, Douglas and 11 more | 114 min |
| Jul 7, 3:11 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River | 2 hr |
| Jul 7, 8:15 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence | 2 hr |
| Jul 8, 3:34 PM CDT | Mesoscale Discussion | SPC | Butte, Harding, Perkins | 86 min |
| Jul 8, 5:56 PM CDT | Mesoscale Discussion | SPC | Butte, Harding, Meade, Perkins, Ziebach | 2 hr |
| Jul 8, 7:08 PM CDT | Mesoscale Discussion | SPC | Bennett, Haakon, Jackson, Meade, Oglala Lakota, Pennington and 2 more | 97 min |
| Jul 8, 8:54 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brule, Buffalo, Campbell, Corson and 16 more | 2 hr |
| Jul 9, 2:41 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 27 more | 34 min |
| Jul 9, 8:21 PM CDT | Mesoscale Discussion | SPC | Gregory | 114 min |
| Jul 13, 3:21 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence, Oglala Lakota, Pennington | 84 min |
| Jul 13, 8:35 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence | 85 min |
| Jul 13, 11:30 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Jackson, Lawrence, Meade and 2 more | 90 min |
| Jul 16, 3:16 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Oglala Lakota, Pennington | 119 min |
| Jul 16, 7:16 PM CDT | Mesoscale Discussion | SPC | Bennett, Fall River, Oglala Lakota | 89 min |
| Jul 17, 3:40 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Oglala Lakota, Pennington | 3 hr |
| Jul 22, 3:24 PM CDT | Mesoscale Discussion | SPC | Butte, Harding, Lawrence | 2 hr |
| Jul 22, 5:42 PM CDT | Mesoscale Discussion | SPC | Butte, Corson, Lawrence, Meade, Perkins, Ziebach | 3 hr |
| Jul 23, 5:04 PM CDT | Mesoscale Discussion | SPC | Beadle, Brown, Butte, Campbell, Clark, Codington and 14 more | 3 hr |
| Jul 23, 9:07 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Davison, Deuel, Douglas and 11 more | 2 hr |
| Jul 23, 10:33 PM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Day, Edmunds, McPherson, Marshall and 2 more | 117 min |
| Jul 25, 3:28 PM CDT | Mesoscale Discussion | SPC | Bennett, Brown, Buffalo, Edmunds, Faulk, Haakon and 12 more | 2 hr |
| Jul 25, 9:49 PM CDT | Mesoscale Discussion | SPC | Grant, Marshall, Roberts | 116 min |
| Jul 26, 7:40 PM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Day, Edmunds, McPherson, Marshall and 1 more | 95 min |
| Jul 28, 2:48 AM CDT | Mesoscale Discussion | SPC | Codington, Day, Deuel, Grant, Marshall, Roberts | 2 hr |
| Aug 5, 3:40 PM CDT | Mesoscale Discussion | SPC | Brookings, Deuel | 65 min |
| Aug 5, 9:34 PM CDT | Mesoscale Discussion | SPC | Clay, Lincoln, Minnehaha, Turner, Union | 86 min |
| Aug 6, 6:07 PM CDT | Mesoscale Discussion | SPC | Bennett, Jackson, Mellette, Oglala Lakota, Todd | 113 min |
| Aug 6, 9:09 PM CDT | Mesoscale Discussion | SPC | Aurora, Bon Homme, Brule, Buffalo, Charles Mix, Clay and 17 more | 2 hr |
| Aug 6, 11:54 PM CDT | Mesoscale Discussion | SPC | Beadle, Clay, Davison, Hamlin, Hanson, Hutchinson and 10 more | 2 hr |
| Aug 7, 2:10 AM CDT | Mesoscale Discussion | SPC | Brookings, Clark, Codington, Day, Deuel, Grant and 3 more | 2 hr |
| Aug 7, 7:12 PM CDT | Mesoscale Discussion | SPC | Brown, Day, Marshall | 93 min |
| Aug 14, 1:50 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Jackson, Oglala Lakota, Pennington | 115 min |
| Aug 20, 1:51 PM CDT | Mesoscale Discussion | SPC | Clay, Lincoln, Union, Yankton | 84 min |
| Aug 22, 2:21 PM CDT | Mesoscale Discussion | SPC | Beadle, Brown, Buffalo, Campbell, Edmunds, Faulk and 8 more | 2 hr |
| Aug 22, 3:38 PM CDT | Mesoscale Discussion | SPC | Gregory, Tripp | 97 min |
| Aug 22, 5:59 PM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Brown, Campbell, Clark, Codington and 11 more | 91 min |
| Aug 22, 8:40 PM CDT | Mesoscale Discussion | SPC | Aurora, Davison, Douglas, Hanson, Hutchinson, Jerauld and 2 more | 65 min |
| Aug 23, 2:56 PM CDT | Mesoscale Discussion | SPC | Aurora, Brule, Buffalo, Charles Mix, Gregory, Jones and 4 more | 2 hr |
| Aug 23, 7:38 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brule, Buffalo, Campbell, Corson and 22 more | 2 hr |
| Aug 23, 9:37 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brule, Buffalo, Campbell, Charles Mix and 21 more | 113 min |
| Aug 23, 11:32 PM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Clark, Codington, Day, Edmunds and 8 more | 118 min |
| Aug 25, 3:02 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Charles Mix, Clay, Hutchinson, Lincoln, Turner and 2 more | 88 min |
| Aug 26, 2:35 AM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Corson, Dewey, Edmunds, Faulk and 6 more | 2 hr |
| Aug 26, 3:10 AM CDT | Mesoscale Discussion | SPC | Bon Homme, Charles Mix, Clay, Hutchinson, Turner, Yankton | 3 hr |
| Aug 26, 8:36 AM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Buffalo, Clark, Codington, Day and 10 more | 84 min |
| Aug 26, 10:43 AM CDT | Mesoscale Discussion | SPC | Brookings, Deuel, Moody | 92 min |
| Aug 26, 5:34 PM CDT | Mesoscale Discussion | SPC | Clay, Lincoln, Turner, Union, Yankton | 116 min |
| Aug 26, 7:25 PM CDT | Mesoscale Discussion | SPC | Aurora, Bennett, Bon Homme, Brule, Buffalo, Charles Mix and 22 more | 2 hr |
| Aug 26, 10:45 PM CDT | Mesoscale Discussion | SPC | Union | 2 hr |
| Aug 27, 3:55 PM CDT | Mesoscale Discussion | SPC | Butte, Harding, Perkins | 2 hr |
| Aug 27, 6:33 PM CDT | Mesoscale Discussion | SPC | Butte, Perkins, Ziebach | 117 min |
| Aug 28, 2:17 AM CDT | Mesoscale Discussion | SPC | Brown, Day, Edmunds, Grant, McPherson, Marshall and 1 more | 2 hr |
| Aug 28, 5:42 AM CDT | Mesoscale Discussion | SPC | Brown, Clark, Codington, Day, Deuel, Edmunds and 8 more | 2 hr |
| Aug 28, 2:43 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Clay, Hanson, Hutchinson, Lake, Lincoln and 6 more | 3 hr |
| Aug 28, 7:44 PM CDT | Mesoscale Discussion | SPC | Brookings, Lake, Moody | 91 min |
| Aug 30, 2:50 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Jackson, Lawrence, Meade and 2 more | 115 min |
| Aug 30, 2:54 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson | 2 hr |
| Aug 30, 7:25 PM CDT | Mesoscale Discussion | SPC | Aurora, Bennett, Bon Homme, Brule, Buffalo, Charles Mix and 18 more | 3 hr |
| Aug 31, 3:02 AM CDT | Mesoscale Discussion | SPC | Gregory | 118 min |
| Sep 1, 5:39 PM CDT | Mesoscale Discussion | SPC | Bennett, Dewey, Haakon, Hughes, Jackson, Jones and 6 more | 2 hr |
| Sep 1, 9:20 PM CDT | Mesoscale Discussion | SPC | Bennett, Haakon, Jackson, Jones, Lyman, Mellette and 3 more | 85 min |
| Sep 1, 11:36 PM CDT | Mesoscale Discussion | SPC | Bennett, Haakon, Hughes, Jackson, Jones, Lyman and 5 more | 84 min |
| Sep 3, 3:59 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence, Oglala Lakota, Pennington | 91 min |
| Sep 16, 6:23 PM CDT | Mesoscale Discussion | SPC | Brookings, Clay, Lincoln, Minnehaha, Moody, Turner | 97 min |
| Sep 16, 7:15 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Charles Mix, Douglas, Gregory, Hutchinson | 2 hr |
| Oct 9, 12:04 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Brule, Buffalo, Clark and 14 more | 2 hr |
| Oct 9, 3:40 PM CDT | Mesoscale Discussion | SPC | Beadle, Clark, Codington, Deuel, Hamlin, Kingsbury | 95 min |
| Oct 9, 5:50 PM CDT | Mesoscale Discussion | SPC | Haakon, Jackson, Jones, Mellette, Stanley, Todd | 55 min |
| Oct 9, 6:00 PM CDT | Mesoscale Discussion | SPC | Codington, Deuel, Grant, Roberts | 90 min |
| Oct 13, 4:58 AM CDT | Mesoscale Discussion | SPC | Butte, Harding, Lawrence | 6 hr |
| Oct 13, 3:10 PM CDT | Mesoscale Discussion | SPC | Brown, Edmunds, McPherson, Marshall, Roberts | 65 min |
| Dec 9, 9:49 PM CST | Mesoscale Discussion | SPC | Bennett, Fall River, Gregory, Todd | 5 hr |
| Dec 10, 2:39 AM CST | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Jackson, Mellette, Oglala Lakota and 2 more | 4 hr |
| Dec 10, 9:10 AM CST | Mesoscale Discussion | SPC | Aurora, Bon Homme, Brule, Charles Mix, Davison, Douglas and 11 more | 4 hr |
| Dec 10, 12:27 PM CST | Mesoscale Discussion | SPC | Bon Homme, Clay, Hanson, Hutchinson, Lake, Lincoln and 6 more | 4 hr |
| Dec 15, 12:28 PM CST | Mesoscale Discussion | SPC | Clay, Union | 2 hr |
| Dec 15, 3:55 PM CST | Mesoscale Discussion | SPC | Clay, Lincoln, Union | 95 min |
| Dec 15, 4:05 PM CST | Mesoscale Discussion | SPC | Todd | 3 hr |
| Dec 26, 4:44 PM CST | Mesoscale Discussion | SPC | Roberts | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Oglala Lakota County34
- Fall River County33
- Bennett County29
- Custer County28
- Jackson County27
- Pennington County24
- Clay County23
- Haakon County23
- Lawrence County22
- Turner County21
- Union County20
- Hutchinson County20
- Butte County19
- Davison County19
- Yankton County19
- Ziebach County19
- Lincoln County18
- Mellette County18
- Todd County18
- Meade County18
- Perkins County18
- Tripp County17
- Edmunds County17
- Jerauld County17
- Jones County17
- Harding County17
- Campbell County17
- Brookings County16
- Codington County16
- Lake County16
- McCook County16
- Minnehaha County16
- Aurora County16
- Bon Homme County16
- Charles Mix County16
- Corson County16
- Douglas County16
- Gregory County16
- Lyman County16
- Stanley County16
26 more counties
- Deuel County15
- Moody County15
- Beadle County15
- Buffalo County15
- Dewey County15
- Hanson County15
- Hughes County15
- Potter County15
- Sanborn County15
- Spink County15
- Roberts County15
- Brown County15
- Hamlin County14
- Brule County14
- Faulk County14
- Miner County14
- Sully County14
- Walworth County14
- McPherson County14
- Hand County13
- Day County13
- Marshall County13
- Kingsbury County12
- Clark County12
- Hyde County12
- Grant County10
The busiest days
Days with the most alerts issued, by UTC date.
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.