Alert archive / South Dakota / Mesoscale Discussions / 2021

Mesoscale Discussions in South Dakota, August 2021

35 mesoscale discussions in August 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 August 2021. Tap one for its archive.

Mesoscale Discussions
35
Busiest day
August 26, 20215 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.

IssuedProductOfficeCountiesLasted
Aug 5, 3:40 PM CDTMesoscale DiscussionSPCBrookings, Deuel65 min
Aug 5, 9:34 PM CDTMesoscale DiscussionSPCClay, Lincoln, Minnehaha, Turner, Union86 min
Aug 6, 6:07 PM CDTMesoscale DiscussionSPCBennett, Jackson, Mellette, Oglala Lakota, Todd113 min
Aug 6, 9:09 PM CDTMesoscale DiscussionSPCAurora, Bon Homme, Brule, Buffalo, Charles Mix, Clay and 17 more2 hr
Aug 6, 11:54 PM CDTMesoscale DiscussionSPCBeadle, Clay, Davison, Hamlin, Hanson, Hutchinson and 10 more2 hr
Aug 7, 2:10 AM CDTMesoscale DiscussionSPCBrookings, Clark, Codington, Day, Deuel, Grant and 3 more2 hr
Aug 7, 7:12 PM CDTMesoscale DiscussionSPCBrown, Day, Marshall93 min
Aug 14, 1:50 PM CDTMesoscale DiscussionSPCBennett, Custer, Fall River, Jackson, Oglala Lakota, Pennington115 min
Aug 20, 1:51 PM CDTMesoscale DiscussionSPCClay, Lincoln, Union, Yankton84 min
Aug 22, 2:21 PM CDTMesoscale DiscussionSPCBeadle, Brown, Buffalo, Campbell, Edmunds, Faulk and 8 more2 hr
Aug 22, 3:38 PM CDTMesoscale DiscussionSPCGregory, Tripp97 min
Aug 22, 5:59 PM CDTMesoscale DiscussionSPCBeadle, Brookings, Brown, Campbell, Clark, Codington and 11 more91 min
Aug 22, 8:40 PM CDTMesoscale DiscussionSPCAurora, Davison, Douglas, Hanson, Hutchinson, Jerauld and 2 more65 min
Aug 23, 2:56 PM CDTMesoscale DiscussionSPCAurora, Brule, Buffalo, Charles Mix, Gregory, Jones and 4 more2 hr
Aug 23, 7:38 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brule, Buffalo, Campbell, Corson and 22 more2 hr
Aug 23, 9:37 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brule, Buffalo, Campbell, Charles Mix and 21 more113 min
Aug 23, 11:32 PM CDTMesoscale DiscussionSPCBrown, Campbell, Clark, Codington, Day, Edmunds and 8 more118 min
Aug 25, 3:02 PM CDTMesoscale DiscussionSPCBon Homme, Charles Mix, Clay, Hutchinson, Lincoln, Turner and 2 more88 min
Aug 26, 2:35 AM CDTMesoscale DiscussionSPCBrown, Campbell, Corson, Dewey, Edmunds, Faulk and 6 more2 hr
Aug 26, 3:10 AM CDTMesoscale DiscussionSPCBon Homme, Charles Mix, Clay, Hutchinson, Turner, Yankton3 hr
Aug 26, 8:36 AM CDTMesoscale DiscussionSPCBeadle, Brookings, Buffalo, Clark, Codington, Day and 10 more84 min
Aug 26, 10:43 AM CDTMesoscale DiscussionSPCBrookings, Deuel, Moody92 min
Aug 26, 5:34 PM CDTMesoscale DiscussionSPCClay, Lincoln, Turner, Union, Yankton116 min
Aug 26, 7:25 PM CDTMesoscale DiscussionSPCAurora, Bennett, Bon Homme, Brule, Buffalo, Charles Mix and 22 more2 hr
Aug 26, 10:45 PM CDTMesoscale DiscussionSPCUnion2 hr
Aug 27, 3:55 PM CDTMesoscale DiscussionSPCButte, Harding, Perkins2 hr
Aug 27, 6:33 PM CDTMesoscale DiscussionSPCButte, Perkins, Ziebach117 min
Aug 28, 2:17 AM CDTMesoscale DiscussionSPCBrown, Day, Edmunds, Grant, McPherson, Marshall and 1 more2 hr
Aug 28, 5:42 AM CDTMesoscale DiscussionSPCBrown, Clark, Codington, Day, Deuel, Edmunds and 8 more2 hr
Aug 28, 2:43 PM CDTMesoscale DiscussionSPCBon Homme, Clay, Hanson, Hutchinson, Lake, Lincoln and 6 more3 hr
Aug 28, 7:44 PM CDTMesoscale DiscussionSPCBrookings, Lake, Moody91 min
Aug 30, 2:50 PM CDTMesoscale DiscussionSPCBennett, Custer, Fall River, Jackson, Lawrence, Meade and 2 more115 min
Aug 30, 2:54 PM CDTMesoscale DiscussionSPCCampbell, Corson2 hr
Aug 30, 7:25 PM CDTMesoscale DiscussionSPCAurora, Bennett, Bon Homme, Brule, Buffalo, Charles Mix and 18 more3 hr
Aug 31, 3:02 AM CDTMesoscale DiscussionSPCGregory118 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

26 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.