Alert archive / South Dakota / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in South Dakota, 2009

519 severe thunderstorm warnings in 2009. 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 severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2009. Tap one for its archive.

Severe Thunderstorm Warnings: 519
Busiest month: July178 severe thunderstorm warnings
Busiest day: July 9, 200958 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

342 of 521 severe thunderstorm warnings covering South Dakota in 2009 had a qualifying storm report inside them; 519 of 689 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.

South Dakota, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	521	342	34%	689	75%	22 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Rapid City, SD: severe thunderstorm warnings	262	172	34%	345	79%	27 min
NWS Aberdeen, SD: severe thunderstorm warnings	147	86	41%	173	71%	19 min
NWS Sioux Falls, SD: severe thunderstorm warnings	232	172	26%	374	81%	19 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

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
Mar 22, 9:57 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Jerauld, Sanborn	33 min
Mar 22, 10:06 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Walworth	39 min
Mar 22, 10:32 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	28 min
Mar 22, 10:58 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	16 min
Mar 22, 1:33 PM CDT	Severe Thunderstorm Warning	FSD	McCook	27 min
Mar 22, 7:12 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, Hutchinson, McCook	33 min
Mar 23, 3:34 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	41 min
Mar 23, 4:12 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Gregory	38 min
Mar 23, 4:34 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas, Hutchinson	26 min
Mar 23, 4:53 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	52 min
Mar 23, 4:59 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Turner, Yankton	31 min
Mar 23, 5:03 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, McCook	27 min
Mar 23, 5:33 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, McCook, Turner, Yankton	42 min
Mar 23, 5:36 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	24 min
Mar 23, 5:44 PM CDT	Severe Thunderstorm Warning	FSD	Union	31 min
Mar 23, 5:59 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Union	46 min
Mar 23, 6:17 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	43 min
Mar 23, 6:33 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	27 min
Mar 23, 6:44 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	46 min
Apr 25, 1:08 AM CDT	Severe Thunderstorm Warning	FSD	Union	52 min
Apr 29, 9:08 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall	37 min
Apr 29, 9:36 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall	39 min
Apr 29, 10:06 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall, Roberts	54 min
May 5, 6:26 AM CDT	Severe Thunderstorm Warning	FSD	Union	34 min
May 6, 2:27 AM CDT	Severe Thunderstorm Warning	FSD	Turner	35 min
May 12, 5:14 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Harding, Meade, Perkins	61 min
May 12, 5:57 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Meade, Perkins, Ziebach	78 min
May 12, 6:44 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	61 min
May 12, 6:51 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	38 min
May 12, 6:57 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Mellette, Todd	63 min
May 12, 7:33 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd	39 min
May 12, 7:34 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Walworth	41 min
May 12, 7:58 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	32 min
May 12, 8:30 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Lyman	45 min
May 12, 8:41 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Potter	49 min
May 12, 9:20 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Hughes, Hyde, Potter, Sully	11 min
May 12, 9:54 PM CDT	Severe Thunderstorm Warning	ABR	Spink	13 min
May 28, 5:06 PM CDT	Severe Thunderstorm Warning	UNR		24 min
May 28, 5:18 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Stanley, Sully	27 min
May 29, 5:56 PM CDT	Severe Thunderstorm Warning	ABR	Corson	49 min
May 29, 6:45 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey, Walworth	45 min
May 29, 7:24 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter	51 min
May 29, 7:54 PM CDT	Severe Thunderstorm Warning	ABR	Potter, Sully	51 min
May 31, 12:39 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	44 min
May 31, 1:49 PM CDT	Severe Thunderstorm Warning	UNR	Custer	18 min
May 31, 2:51 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	39 min
May 31, 2:59 PM CDT	Severe Thunderstorm Warning	UNR		61 min
May 31, 4:04 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	56 min
May 31, 5:34 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Hamlin	41 min
May 31, 6:01 PM CDT	Severe Thunderstorm Warning	ABR	Clark	30 min
May 31, 6:12 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury	33 min
May 31, 6:25 PM CDT	Severe Thunderstorm Warning	FSD	Brule	35 min
May 31, 6:44 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury	31 min
May 31, 6:46 PM CDT	Severe Thunderstorm Warning	FSD	Miner, Sanborn	29 min
May 31, 7:13 PM CDT	Severe Thunderstorm Warning	FSD	Miner, Sanborn	32 min
May 31, 7:44 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	31 min
Jun 6, 4:18 PM CDT	Severe Thunderstorm Warning	UNR	Custer	56 min
Jun 13, 4:14 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	61 min
Jun 13, 4:36 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	54 min
Jun 13, 4:55 PM CDT	Severe Thunderstorm Warning	UNR		65 min
Jun 13, 5:03 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	72 min
Jun 13, 5:16 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	16 min
Jun 13, 5:43 PM CDT	Severe Thunderstorm Warning	UNR	Bennett	62 min
Jun 13, 5:50 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	70 min
Jun 13, 6:27 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Tripp	39 min
Jun 13, 6:30 PM CDT	Severe Thunderstorm Warning	UNR		35 min
Jun 13, 7:03 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	58 min
Jun 13, 7:39 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	51 min
Jun 13, 8:37 PM CDT	Severe Thunderstorm Warning	UNR	Custer	31 min
Jun 13, 8:58 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	92 min
Jun 13, 9:17 PM CDT	Severe Thunderstorm Warning	UNR		58 min
Jun 13, 10:25 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	30 min
Jun 14, 4:40 PM CDT	Severe Thunderstorm Warning	UNR	Butte	57 min
Jun 14, 4:51 PM CDT	Severe Thunderstorm Warning	UNR	Meade	54 min
Jun 14, 5:02 PM CDT	Severe Thunderstorm Warning	UNR	Meade	58 min
Jun 14, 5:28 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	62 min
Jun 14, 6:12 PM CDT	Severe Thunderstorm Warning	UNR	Custer	63 min
Jun 14, 6:28 PM CDT	Severe Thunderstorm Warning	UNR	Meade	62 min
Jun 14, 7:15 PM CDT	Severe Thunderstorm Warning	UNR	Custer	47 min
Jun 14, 7:19 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	56 min
Jun 14, 7:36 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	54 min
Jun 14, 8:09 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	66 min
Jun 14, 8:59 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	61 min
Jun 14, 9:53 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	67 min
Jun 14, 10:25 PM CDT	Severe Thunderstorm Warning	UNR	Jackson	23 min
Jun 14, 11:08 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	23 min
Jun 15, 3:56 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence, Meade	64 min
Jun 15, 4:27 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	63 min
Jun 15, 5:03 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Meade	57 min
Jun 15, 5:25 PM CDT	Severe Thunderstorm Warning	ABR	Corson	50 min
Jun 15, 5:33 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	42 min
Jun 15, 6:13 PM CDT	Severe Thunderstorm Warning	ABR	Corson	62 min
Jun 15, 6:16 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	59 min
Jun 15, 6:46 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	59 min
Jun 15, 7:31 PM CDT	Severe Thunderstorm Warning	UNR		59 min
Jun 15, 7:44 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	61 min
Jun 15, 7:48 PM CDT	Severe Thunderstorm Warning	UNR	Bennett	57 min
Jun 15, 8:02 PM CDT	Severe Thunderstorm Warning	UNR	Mellette	58 min
Jun 15, 8:04 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd	24 min
Jun 15, 8:14 PM CDT	Severe Thunderstorm Warning	UNR	Ziebach	48 min
Jun 15, 8:29 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Stanley, Sully	46 min
Jun 15, 8:47 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	13 min
Jun 15, 8:49 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Todd	56 min
Jun 15, 8:51 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	54 min
Jun 15, 9:17 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Hughes, Jones, Stanley, Sully	43 min
Jun 15, 10:01 PM CDT	Severe Thunderstorm Warning	ABR	Stanley	44 min
Jun 15, 10:04 PM CDT	Severe Thunderstorm Warning	UNR	Haakon	56 min
Jun 16, 1:30 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	30 min
Jun 16, 1:32 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Spink	43 min
Jun 16, 2:17 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Spink	58 min
Jun 16, 2:20 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	40 min
Jun 16, 2:58 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Spink	30 min
Jun 16, 3:10 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Spink	44 min
Jun 16, 3:28 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	62 min
Jun 16, 3:35 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	25 min
Jun 16, 3:56 PM CDT	Severe Thunderstorm Warning	ABR	Hand	49 min
Jun 16, 4:42 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	33 min
Jun 16, 5:28 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Jerauld, Sanborn	47 min
Jun 16, 6:18 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Jerauld, Sanborn	29 min
Jun 16, 6:55 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Douglas, Hanson, Hutchinson	35 min
Jun 16, 6:58 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	32 min
Jun 16, 7:12 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, McCook	48 min
Jun 16, 8:58 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Clay, Yankton	32 min
Jun 16, 9:27 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union, Yankton	48 min
Jun 16, 9:55 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	50 min
Jun 16, 10:47 PM CDT	Severe Thunderstorm Warning	FSD	Union	43 min
Jun 17, 3:38 PM CDT	Severe Thunderstorm Warning	UNR	Todd	42 min
Jun 17, 4:30 PM CDT	Severe Thunderstorm Warning	UNR	Meade	35 min
Jun 17, 4:47 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	38 min
Jun 17, 4:59 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	61 min
Jun 17, 5:08 PM CDT	Severe Thunderstorm Warning	UNR	Meade	67 min
Jun 17, 5:43 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	47 min
Jun 17, 5:45 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	60 min
Jun 17, 6:31 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	44 min
Jun 17, 9:12 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union, Yankton	48 min
Jun 17, 9:25 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	25 min
Jun 17, 10:17 PM CDT	Severe Thunderstorm Warning	UNR	Haakon	28 min
Jun 17, 10:29 PM CDT	Severe Thunderstorm Warning	ABR	Stanley	21 min
Jun 17, 10:31 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson	27 min
Jun 18, 2:09 AM CDT	Severe Thunderstorm Warning	UNR	Tripp	31 min
Jun 18, 3:58 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	32 min
Jun 18, 4:43 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme	32 min
Jun 18, 5:14 AM CDT	Severe Thunderstorm Warning	FSD	Yankton	31 min
Jun 18, 5:29 AM CDT	Severe Thunderstorm Warning	FSD	Clay	31 min
Jun 18, 5:43 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	47 min
Jun 18, 12:48 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	57 min
Jun 18, 1:31 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	41 min
Jun 18, 2:39 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	51 min
Jun 18, 3:17 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	58 min
Jun 18, 3:22 PM CDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	30 min
Jun 18, 3:49 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	56 min
Jun 18, 4:13 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	16 min
Jun 18, 4:18 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	41 min
Jun 18, 4:43 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Spink	62 min
Jun 18, 6:15 PM CDT	Severe Thunderstorm Warning	ABR	Roberts	60 min
Jun 18, 6:34 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley, Sully	41 min
Jun 18, 7:06 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Spink	39 min
Jun 18, 7:25 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day, Grant	37 min
Jun 18, 8:19 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Lake, Miner	41 min
Jun 21, 4:32 PM CDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	58 min
Jun 21, 4:43 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	62 min
Jun 21, 5:10 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Perkins, Ziebach	65 min
Jun 23, 3:06 AM CDT	Severe Thunderstorm Warning	UNR	Fall River	69 min
Jun 23, 4:16 AM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson	57 min
Jun 23, 7:47 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas	28 min
Jun 23, 8:09 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas, Hutchinson	35 min
Jun 23, 9:38 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, McCook, Minnehaha, Turner	37 min
Jun 23, 10:05 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha, Turner	25 min
Jun 24, 3:33 AM CDT	Severe Thunderstorm Warning	FSD	Union	16 min
Jun 24, 6:56 PM CDT	Severe Thunderstorm Warning	ABR	Brown	49 min
Jun 24, 7:39 PM CDT	Severe Thunderstorm Warning	ABR	Jones	51 min
Jun 24, 7:41 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall	49 min
Jun 24, 8:11 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Lyman	38 min
Jun 24, 8:14 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall, Roberts	49 min
Jun 24, 8:15 PM CDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	52 min
Jun 24, 9:00 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day	45 min
Jun 24, 9:02 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Grant, Roberts	43 min
Jun 24, 10:31 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	29 min
Jun 24, 11:35 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	25 min
Jun 24, 11:41 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Yankton	34 min
Jun 24, 11:59 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Sanborn	31 min
Jun 25, 12:06 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Union	24 min
Jun 25, 12:24 AM CDT	Severe Thunderstorm Warning	FSD	Union	36 min
Jun 25, 12:35 AM CDT	Severe Thunderstorm Warning	FSD	Douglas, Hutchinson	25 min
Jun 25, 12:58 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas, Hutchinson	32 min
Jun 25, 1:13 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas	17 min
Jun 25, 1:17 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme	43 min
Jun 25, 2:12 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Yankton	38 min
Jun 25, 6:14 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	61 min
Jun 25, 6:37 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	30 min
Jun 25, 7:26 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Meade, Pennington, Ziebach	64 min
Jun 25, 7:43 PM CDT	Severe Thunderstorm Warning	UNR	Jackson	43 min
Jun 25, 7:48 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	43 min
Jun 25, 8:29 PM CDT	Severe Thunderstorm Warning	UNR	Haakon	61 min
Jun 26, 2:32 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	37 min
Jun 26, 3:23 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	67 min
Jun 26, 3:27 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	63 min
Jun 26, 4:15 PM CDT	Severe Thunderstorm Warning	UNR	Meade	60 min
Jun 26, 4:20 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	55 min
Jun 26, 4:35 PM CDT	Severe Thunderstorm Warning	UNR		42 min
Jun 26, 5:45 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Pennington	60 min
Jun 26, 5:49 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Ziebach	56 min
Jun 26, 6:18 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Pennington	34 min
Jun 26, 6:45 PM CDT	Severe Thunderstorm Warning	ABR	Stanley	60 min
Jun 26, 6:55 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd	65 min
Jun 26, 7:14 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Lyman, Stanley	46 min
Jun 26, 7:30 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Walworth	22 min
Jun 26, 7:32 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	73 min
Jun 26, 7:59 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Jones, Lyman, Stanley, Sully	46 min
Jun 26, 8:05 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Hughes, Potter, Stanley, Sully	40 min
Jun 26, 8:31 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	74 min
Jun 26, 9:22 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	38 min
Jun 26, 9:55 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	35 min
Jun 26, 9:59 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Gregory	46 min
Jun 26, 10:29 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Hanson, Jerauld, Miner, Sanborn	46 min
Jun 26, 11:04 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Kingsbury, Lake, McCook, Miner and 1 more	26 min
Jun 26, 11:13 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Davison, Hanson, Hutchinson, McCook and 3 more	47 min
Jun 26, 11:59 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Clay, Hutchinson, Lincoln, Turner, Union and 1 more	31 min
Jun 27, 12:06 AM CDT	Severe Thunderstorm Warning	FSD	Lake, Lincoln, McCook, Minnehaha, Moody, Turner	24 min
Jun 27, 4:01 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, McPherson	44 min
Jun 27, 4:29 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson	46 min
Jun 29, 4:23 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Perkins	67 min
Jun 29, 5:14 PM CDT	Severe Thunderstorm Warning	UNR	Meade	61 min
Jun 29, 6:07 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Meade, Pennington, Ziebach	53 min
Jun 29, 6:42 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	63 min
Jun 29, 7:51 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Lyman, Stanley	54 min
Jun 30, 9:21 PM CDT	Severe Thunderstorm Warning	UNR	Harding	54 min
Jun 30, 10:03 PM CDT	Severe Thunderstorm Warning	UNR	Harding	57 min
Jun 30, 10:42 PM CDT	Severe Thunderstorm Warning	UNR	Harding	63 min
Jul 1, 1:03 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	57 min
Jul 1, 6:24 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	70 min
Jul 1, 7:36 PM CDT	Severe Thunderstorm Warning	UNR	Butte	54 min
Jul 1, 8:20 PM CDT	Severe Thunderstorm Warning	UNR	Butte	55 min
Jul 2, 1:23 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	67 min
Jul 2, 2:28 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	62 min
Jul 2, 2:45 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	60 min
Jul 2, 5:30 PM CDT	Severe Thunderstorm Warning	ABR	McPherson	45 min
Jul 2, 7:54 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	66 min
Jul 6, 2:33 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	27 min
Jul 6, 3:47 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Deuel, Hamlin	43 min
Jul 6, 7:20 PM CDT	Severe Thunderstorm Warning	ABR	Faulk	55 min
Jul 6, 7:39 PM CDT	Severe Thunderstorm Warning	ABR	Faulk	51 min
Jul 7, 9:42 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Walworth	43 min
Jul 7, 11:53 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	42 min
Jul 7, 2:52 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Grant, Hamlin	68 min
Jul 7, 3:23 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury	52 min
Jul 7, 3:27 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Deuel, Grant, Hamlin	48 min
Jul 7, 4:09 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury, Lake, Miner, Moody	51 min
Jul 7, 5:23 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Lake	37 min
Jul 7, 5:58 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Minnehaha, Moody	47 min
Jul 7, 6:50 PM CDT	Severe Thunderstorm Warning	FSD	McCook, Minnehaha	40 min
Jul 7, 7:32 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury, Miner, Sanborn	43 min
Jul 7, 7:51 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	39 min
Jul 7, 7:57 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha, Turner	33 min
Jul 7, 8:58 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	32 min
Jul 7, 9:14 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Miner, Sanborn	46 min
Jul 7, 9:58 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, McCook, Miner, Sanborn	47 min
Jul 7, 10:49 PM CDT	Severe Thunderstorm Warning	FSD	Union	41 min
Jul 8, 5:20 PM CDT	Severe Thunderstorm Warning	UNR	Meade	20 min
Jul 8, 5:30 PM CDT	Severe Thunderstorm Warning	UNR	Harding	45 min
Jul 8, 5:58 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	62 min
Jul 8, 6:07 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	53 min
Jul 8, 6:50 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	55 min
Jul 8, 6:57 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Harding	46 min
Jul 8, 7:00 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	37 min
Jul 8, 7:04 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	24 min
Jul 8, 7:24 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Meade, Pennington	66 min
Jul 8, 7:41 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson	64 min
Jul 8, 8:30 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	60 min
Jul 8, 9:14 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	61 min
Jul 8, 9:17 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	58 min
Jul 8, 9:19 PM CDT	Severe Thunderstorm Warning	ABR	Hyde, Potter, Sully	41 min
Jul 8, 9:40 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Faulk, Potter, Sully, Walworth	65 min
Jul 8, 9:57 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	63 min
Jul 8, 10:02 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	26 min
Jul 8, 10:04 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	41 min
Jul 8, 10:06 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Mellette, Todd	54 min
Jul 8, 10:23 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	52 min
Jul 8, 10:36 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Hyde, Potter	39 min
Jul 8, 10:44 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter, Sully	34 min
Jul 8, 10:47 PM CDT	Severe Thunderstorm Warning	FSD	Brule	43 min
Jul 8, 10:52 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	38 min
Jul 8, 11:02 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	88 min
Jul 8, 11:11 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	64 min
Jul 8, 11:21 PM CDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	54 min
Jul 8, 11:52 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	53 min
Jul 9, 12:13 AM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	32 min
Jul 9, 12:35 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, McPherson, Potter, Walworth	42 min
Jul 9, 12:43 AM CDT	Severe Thunderstorm Warning	UNR	Tripp	20 min
Jul 9, 1:12 AM CDT	Severe Thunderstorm Warning	UNR	Tripp	78 min
Jul 9, 1:18 AM CDT	Severe Thunderstorm Warning	ABR	Clark	42 min
Jul 9, 1:37 AM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook	38 min
Jul 9, 1:52 AM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington	53 min
Jul 9, 2:12 AM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, McCook, Minnehaha, Turner	48 min
Jul 9, 2:22 AM CDT	Severe Thunderstorm Warning	ABR	Hand, Hughes, Hyde, Sully	38 min
Jul 9, 2:46 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	33 min
Jul 9, 2:54 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Faulk, Hand, Hughes, Hyde, Spink	51 min
Jul 9, 3:10 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	65 min
Jul 9, 3:52 AM CDT	Severe Thunderstorm Warning	FSD	Jerauld	38 min
Jul 9, 3:56 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand	30 min
Jul 9, 4:13 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	32 min
Jul 9, 4:29 AM CDT	Severe Thunderstorm Warning	FSD	Jerauld	31 min
Jul 9, 4:35 AM CDT	Severe Thunderstorm Warning	FSD	Aurora	40 min
Jul 9, 4:45 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Hanson, Sanborn	45 min
Jul 9, 5:02 AM CDT	Severe Thunderstorm Warning	FSD	Hanson, Hutchinson, Miner, Sanborn	43 min
Jul 9, 5:10 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Charles Mix, Douglas, Hutchinson	35 min
Jul 9, 5:22 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, Lake, McCook, Miner	38 min
Jul 9, 5:26 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	34 min
Jul 9, 5:43 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Douglas, Hutchinson, Yankton	47 min
Jul 9, 5:55 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Hanson, Hutchinson, Lincoln, McCook, Minnehaha and 2 more	34 min
Jul 9, 6:23 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Hutchinson, Yankton	52 min
Jul 9, 7:12 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Yankton	33 min
Jul 9, 7:25 AM CDT	Severe Thunderstorm Warning	FSD	Clay	35 min
Jul 9, 8:03 AM CDT	Severe Thunderstorm Warning	FSD	Union	42 min
Jul 9, 8:29 AM CDT	Severe Thunderstorm Warning	FSD	Union	61 min
Jul 9, 10:50 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Union	25 min
Jul 9, 11:14 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	31 min
Jul 9, 2:02 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	28 min
Jul 9, 2:28 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union, Yankton	32 min
Jul 9, 2:48 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	27 min
Jul 9, 3:15 PM CDT	Severe Thunderstorm Warning	FSD	Union	30 min
Jul 9, 6:48 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	42 min
Jul 9, 10:22 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	53 min
Jul 9, 11:08 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	67 min
Jul 9, 11:14 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	61 min
Jul 10, 12:06 AM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	54 min
Jul 10, 12:08 AM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	32 min
Jul 10, 12:50 AM CDT	Severe Thunderstorm Warning	UNR	Fall River	55 min
Jul 10, 1:39 AM CDT	Severe Thunderstorm Warning	UNR	Bennett	81 min
Jul 10, 8:24 PM CDT	Severe Thunderstorm Warning	UNR		51 min
Jul 11, 5:29 AM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	61 min
Jul 11, 5:53 AM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	39 min
Jul 11, 5:54 AM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson	66 min
Jul 11, 6:39 AM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	26 min
Jul 11, 6:52 AM CDT	Severe Thunderstorm Warning	UNR	Custer	32 min
Jul 11, 7:38 AM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson	67 min
Jul 11, 9:10 AM CDT	Severe Thunderstorm Warning	UNR	Bennett, Todd	45 min
Jul 12, 3:36 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	39 min
Jul 12, 4:10 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	35 min
Jul 12, 6:27 AM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Miner	33 min
Jul 12, 6:35 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	25 min
Jul 12, 6:59 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Davison, Hanson, Kingsbury, Miner, Sanborn	46 min
Jul 12, 7:33 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, McCook, Minnehaha, Turner	42 min
Jul 13, 6:41 AM CDT	Severe Thunderstorm Warning	UNR	Perkins	49 min
Jul 13, 10:23 AM CDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	67 min
Jul 13, 10:52 AM CDT	Severe Thunderstorm Warning	ABR	Corson	32 min
Jul 13, 11:27 AM CDT	Severe Thunderstorm Warning	UNR	Ziebach	63 min
Jul 13, 1:05 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Stanley, Sully	55 min
Jul 13, 1:46 PM CDT	Severe Thunderstorm Warning	UNR	Meade	59 min
Jul 13, 2:01 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Hughes, Stanley, Sully	44 min
Jul 13, 2:32 PM CDT	Severe Thunderstorm Warning	UNR	Meade	58 min
Jul 13, 3:18 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Ziebach	57 min
Jul 13, 4:54 PM CDT	Severe Thunderstorm Warning	UNR	Haakon	81 min
Jul 13, 5:09 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	66 min
Jul 13, 5:12 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Hyde	48 min
Jul 13, 5:35 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	40 min
Jul 13, 5:44 PM CDT	Severe Thunderstorm Warning	ABR	Hand	31 min
Jul 13, 5:59 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Mellette	61 min
Jul 13, 6:10 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	50 min
Jul 13, 6:48 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Jerauld, Sanborn	27 min
Jul 13, 6:49 PM CDT	Severe Thunderstorm Warning	ABR	Jones	56 min
Jul 13, 7:18 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	57 min
Jul 13, 7:22 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	53 min
Jul 13, 7:34 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	56 min
Jul 13, 7:45 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence, Meade	75 min
Jul 13, 7:57 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	33 min
Jul 13, 8:03 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	57 min
Jul 13, 8:16 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	29 min
Jul 13, 8:21 PM CDT	Severe Thunderstorm Warning	UNR	Custer	39 min
Jul 13, 8:43 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River, Pennington	62 min
Jul 13, 8:43 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence, Meade, Perkins	92 min
Jul 13, 8:49 PM CDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	86 min
Jul 13, 8:51 PM CDT	Severe Thunderstorm Warning	UNR		54 min
Jul 13, 9:11 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Lawrence, Meade, Pennington	79 min
Jul 13, 9:18 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Pennington	57 min
Jul 13, 9:34 PM CDT	Severe Thunderstorm Warning	UNR	Pennington	56 min
Jul 13, 9:58 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Haakon, Jackson, Meade, Mellette, Pennington and 1 more	92 min
Jul 13, 10:04 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Mellette, Todd	56 min
Jul 13, 10:23 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Sully	34 min
Jul 14, 12:06 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	39 min
Jul 14, 2:50 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury	40 min
Jul 14, 3:19 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury	41 min
Jul 14, 3:50 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	40 min
Jul 14, 4:23 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Moody	37 min
Jul 14, 4:47 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Moody	43 min
Jul 16, 3:01 AM CDT	Severe Thunderstorm Warning	FSD	Gregory	44 min
Jul 16, 3:07 AM CDT	Severe Thunderstorm Warning	UNR	Tripp	41 min
Jul 16, 3:52 AM CDT	Severe Thunderstorm Warning	FSD	Gregory	17 min
Jul 19, 7:01 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Harding	59 min
Jul 19, 7:17 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Harding	58 min
Jul 19, 8:05 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Harding, Meade, Perkins	55 min
Jul 20, 12:54 AM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd	66 min
Jul 20, 3:01 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Lyman, Stanley	28 min
Jul 27, 5:40 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	65 min
Jul 31, 4:33 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall	42 min
Jul 31, 4:41 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day	49 min
Jul 31, 4:59 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Hamlin	46 min
Jul 31, 5:26 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Grant	49 min
Jul 31, 5:47 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, McCook, Miner, Sanborn	28 min
Jul 31, 5:52 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Lake, Miner	23 min
Jul 31, 6:11 PM CDT	Severe Thunderstorm Warning	ABR	Deuel, Grant	23 min
Jul 31, 6:21 PM CDT	Severe Thunderstorm Warning	FSD	McCook, Minnehaha	24 min
Jul 31, 6:44 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Minnehaha, Moody	31 min
Jul 31, 6:49 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Moody	26 min
Jul 31, 7:13 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha, Moody	47 min
Aug 2, 6:52 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	38 min
Aug 2, 7:38 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	37 min
Aug 2, 8:05 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, McCook	25 min
Aug 2, 8:32 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook, Minnehaha	43 min
Aug 2, 9:16 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Turner	44 min
Aug 2, 10:32 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union, Yankton	43 min
Aug 2, 10:57 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Union	48 min
Aug 2, 11:32 PM CDT	Severe Thunderstorm Warning	FSD	Union	28 min
Aug 3, 6:30 PM CDT	Severe Thunderstorm Warning	ABR	Brown	30 min
Aug 3, 6:57 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Day	27 min
Aug 3, 7:06 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Lyman, Stanley	54 min
Aug 3, 7:29 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Hyde	46 min
Aug 3, 7:35 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hughes, Hyde, Lyman, Stanley	40 min
Aug 3, 7:46 PM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall, Roberts	34 min
Aug 3, 7:53 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	67 min
Aug 3, 8:15 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Hughes, Hyde, Lyman	45 min
Aug 3, 8:32 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	58 min
Aug 3, 8:44 PM CDT	Severe Thunderstorm Warning	UNR	Bennett	20 min
Aug 3, 8:53 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	67 min
Aug 3, 8:55 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	35 min
Aug 3, 8:59 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	61 min
Aug 3, 9:18 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	27 min
Aug 3, 9:26 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	49 min
Aug 3, 9:31 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Douglas	29 min
Aug 3, 10:11 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	22 min
Aug 3, 11:37 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	33 min
Aug 3, 11:39 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	51 min
Aug 4, 1:06 AM CDT	Severe Thunderstorm Warning	UNR	Tripp	54 min
Aug 4, 7:58 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River, Lawrence, Meade, Pennington	77 min
Aug 4, 8:54 PM CDT	Severe Thunderstorm Warning	UNR	Custer, Fall River, Jackson, Lawrence, Meade, Pennington	81 min
Aug 4, 9:37 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	41 min
Aug 4, 10:01 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Mellette, Pennington, Todd	74 min
Aug 6, 12:49 AM CDT	Severe Thunderstorm Warning	UNR	Haakon	56 min
Aug 6, 1:25 AM CDT	Severe Thunderstorm Warning	UNR	Haakon, Pennington	65 min
Aug 6, 1:37 AM CDT	Severe Thunderstorm Warning	ABR	Jones	53 min
Aug 6, 2:22 AM CDT	Severe Thunderstorm Warning	ABR	Jones	38 min
Aug 6, 7:25 AM CDT	Severe Thunderstorm Warning	UNR	Butte	34 min
Aug 6, 7:47 AM CDT	Severe Thunderstorm Warning	UNR	Butte	58 min
Aug 6, 8:37 PM CDT	Severe Thunderstorm Warning	UNR	Bennett	39 min
Aug 7, 6:19 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence, Meade	56 min
Aug 7, 6:57 PM CDT	Severe Thunderstorm Warning	UNR	Meade	63 min
Aug 7, 7:29 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	61 min
Aug 7, 8:14 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Meade, Pennington	91 min
Aug 7, 9:29 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	61 min
Aug 7, 9:44 PM CDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson	31 min
Aug 7, 9:47 PM CDT	Severe Thunderstorm Warning	UNR	Jackson	73 min
Aug 7, 10:25 PM CDT	Severe Thunderstorm Warning	UNR	Harding	95 min
Aug 8, 2:25 AM CDT	Severe Thunderstorm Warning	UNR	Butte	25 min
Aug 8, 2:38 AM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	67 min
Aug 8, 4:13 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	32 min
Aug 8, 10:05 AM CDT	Severe Thunderstorm Warning	UNR	Tripp	55 min
Aug 8, 11:09 AM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	36 min
Aug 8, 11:42 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix, Douglas	33 min
Aug 8, 1:51 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	24 min
Aug 8, 1:55 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Gregory, Hutchinson, Yankton	50 min
Aug 8, 1:57 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	48 min
Aug 8, 2:25 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Moody	35 min
Aug 8, 2:43 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Hutchinson, Turner, Yankton	30 min
Aug 8, 7:28 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence	52 min
Aug 8, 8:00 PM CDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence, Meade	60 min
Aug 9, 3:39 PM CDT	Severe Thunderstorm Warning	UNR		66 min
Aug 9, 4:08 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Hyde, Sully	52 min
Aug 9, 4:47 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Spink	17 min
Aug 12, 4:59 PM CDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	61 min
Aug 12, 5:25 PM CDT	Severe Thunderstorm Warning	UNR	Jackson	65 min
Aug 12, 8:01 PM CDT	Severe Thunderstorm Warning	UNR	Mellette	40 min
Aug 12, 9:03 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	57 min
Aug 12, 9:17 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	58 min
Aug 12, 10:10 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas	50 min
Aug 12, 10:31 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	29 min
Aug 13, 12:24 AM CDT	Severe Thunderstorm Warning	ABR	Lyman	51 min
Aug 13, 7:21 PM CDT	Severe Thunderstorm Warning	UNR		54 min
Aug 13, 9:07 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Mellette, Todd	68 min
Aug 14, 4:36 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	39 min
Aug 14, 4:53 PM CDT	Severe Thunderstorm Warning	ABR	McPherson	37 min
Aug 14, 5:21 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	54 min
Aug 14, 5:55 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	50 min
Aug 14, 6:18 PM CDT	Severe Thunderstorm Warning	ABR	Brown	27 min
Aug 14, 8:43 PM CDT	Severe Thunderstorm Warning	ABR	Brown	32 min
Aug 14, 9:16 PM CDT	Severe Thunderstorm Warning	ABR	Brown	12 min
Aug 14, 9:49 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Lyman	26 min
Aug 15, 5:31 PM CDT	Severe Thunderstorm Warning	UNR	Fall River	59 min
Aug 15, 6:17 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson	58 min
Aug 15, 6:54 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Mellette, Todd	66 min
Aug 15, 9:19 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Jones, Lyman, Stanley	41 min
Aug 18, 5:49 PM CDT	Severe Thunderstorm Warning	UNR	Bennett	56 min
Aug 18, 5:58 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Stanley, Sully	47 min
Aug 18, 6:21 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd	54 min
Aug 18, 6:44 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Sully	46 min
Aug 18, 6:51 PM CDT	Severe Thunderstorm Warning	ABR	Jones	17 min
Aug 18, 7:27 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Sully	48 min
Aug 18, 7:49 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Sully	26 min
Aug 18, 8:15 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Hyde	60 min
Aug 19, 4:30 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	30 min
Aug 19, 4:57 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	33 min
Aug 24, 11:36 PM CDT	Severe Thunderstorm Warning	FSD	Union	39 min
Sep 8, 1:38 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	24 min
Sep 8, 3:13 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Todd	62 min
Sep 8, 3:26 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	64 min
Sep 8, 3:48 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	42 min
Sep 8, 3:50 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Todd	70 min
Sep 8, 3:59 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	76 min
Sep 8, 4:40 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	27 min
Sep 8, 5:14 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Spink	46 min
Sep 8, 5:16 PM CDT	Severe Thunderstorm Warning	ABR	Jones, Lyman	28 min
Sep 10, 8:53 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	49 min
Sep 10, 9:41 PM CDT	Severe Thunderstorm Warning	ABR	Corson	49 min
Sep 10, 11:07 PM CDT	Severe Thunderstorm Warning	ABR	Corson	8 min
Sep 10, 11:16 PM CDT	Severe Thunderstorm Warning	ABR	Corson	44 min
Sep 10, 11:16 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	31 min
Sep 10, 11:29 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Perkins, Ziebach	49 min
Sep 10, 11:34 PM CDT	Severe Thunderstorm Warning	ABR	Corson	41 min
Sep 11, 1:36 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Dewey, Edmunds, McPherson, Potter, Walworth	54 min
Sep 21, 3:25 AM CDT	Severe Thunderstorm Warning	FSD	Union	33 min

By county

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

25 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2008 2010

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.