Alert archive / North Dakota / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in North Dakota, 2023

208 severe thunderstorm warnings in 2023. 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 2023. Tap one for its archive.

Severe Thunderstorm Warnings: 208
Busiest month: June56 severe thunderstorm warnings
Busiest day: August 2, 202315 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.

120 of 208 severe thunderstorm warnings covering North Dakota in 2023 had a qualifying storm report inside them; 210 of 256 hail, wind and damage reports fell inside a warning, on average 26 minutes after it went out.

North Dakota, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	208	120	42%	256	82%	26 min

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Aberdeen, SD: severe thunderstorm warnings	126	71	44%	157	73%	23 min
NWS Bismarck, ND: severe thunderstorm warnings	132	89	33%	203	86%	26 min
NWS Grand Forks, ND: severe thunderstorm warnings	146	74	49%	152	75%	25 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
May 9, 5:44 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	46 min
May 9, 6:21 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Mercer, Morton, Oliver	39 min
May 9, 6:55 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	65 min
May 9, 7:54 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	66 min
May 9, 8:59 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	31 min
May 9, 9:14 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	34 min
May 9, 11:34 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	56 min
May 10, 12:25 AM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	43 min
May 10, 7:17 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey	43 min
May 10, 7:48 PM CDT	Severe Thunderstorm Warning	FGF	Benson	42 min
May 10, 8:00 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	45 min
May 10, 8:01 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	44 min
May 10, 8:13 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	32 min
May 10, 8:29 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	46 min
May 10, 8:41 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey	49 min
May 10, 8:52 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey	23 min
May 23, 4:36 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	39 min
May 23, 4:50 PM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	40 min
May 23, 9:40 PM CDT	Severe Thunderstorm Warning	BIS	Kidder	35 min
May 23, 10:20 PM CDT	Severe Thunderstorm Warning	BIS	Adams	25 min
May 25, 6:00 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope	30 min
May 25, 7:20 PM CDT	Severe Thunderstorm Warning	BIS	Williams	40 min
May 25, 7:50 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	40 min
May 25, 7:58 PM CDT	Severe Thunderstorm Warning	BIS	Williams	47 min
May 25, 8:28 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	47 min
May 25, 8:43 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	29 min
Jun 1, 5:17 PM CDT	Severe Thunderstorm Warning	FGF	Traill	43 min
Jun 1, 5:54 PM CDT	Severe Thunderstorm Warning	FGF	Traill	47 min
Jun 2, 4:03 PM CDT	Severe Thunderstorm Warning	FGF	Traill	42 min
Jun 7, 2:35 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	40 min
Jun 7, 3:12 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Steele	48 min
Jun 7, 3:57 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	48 min
Jun 7, 4:35 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	40 min
Jun 7, 4:39 PM CDT	Severe Thunderstorm Warning	FGF	Cass	51 min
Jun 7, 6:20 PM CDT	Severe Thunderstorm Warning	FGF	Richland	40 min
Jun 7, 6:25 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom	21 min
Jun 8, 3:55 PM CDT	Severe Thunderstorm Warning	BIS	McLean	35 min
Jun 8, 5:15 PM CDT	Severe Thunderstorm Warning	BIS	Logan	30 min
Jun 8, 5:40 PM CDT	Severe Thunderstorm Warning	BIS	Logan	35 min
Jun 8, 5:53 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	37 min
Jun 8, 6:21 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Rolette	39 min
Jun 8, 7:11 PM CDT	Severe Thunderstorm Warning	FGF	Benson	49 min
Jun 8, 8:15 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	45 min
Jun 8, 8:37 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	27 min
Jun 8, 9:34 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Benson, Eddy, Ramsey	41 min
Jun 19, 9:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Billings, Golden Valley	58 min
Jun 20, 4:54 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	51 min
Jun 20, 5:38 PM CDT	Severe Thunderstorm Warning	BIS	Sioux	52 min
Jun 20, 5:41 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	49 min
Jun 20, 6:04 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Pierce, Wells	56 min
Jun 20, 6:08 PM CDT	Severe Thunderstorm Warning	FGF	Benson	52 min
Jun 20, 6:30 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	35 min
Jun 20, 6:38 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Morton, Oliver	52 min
Jun 20, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Wells	49 min
Jun 20, 6:58 PM CDT	Severe Thunderstorm Warning	FGF	Benson	47 min
Jun 20, 7:13 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	47 min
Jun 20, 7:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, McLean, Oliver	47 min
Jun 20, 8:08 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	52 min
Jun 20, 8:21 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	25 min
Jun 20, 8:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bottineau, McHenry	66 min
Jun 20, 8:51 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Rolette	39 min
Jun 21, 8:34 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	56 min
Jun 21, 9:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Sioux	66 min
Jun 21, 10:17 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	31 min
Jun 22, 12:32 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	58 min
Jun 22, 3:12 AM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Morton	33 min
Jun 22, 3:35 AM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Morton, Oliver	35 min
Jun 24, 6:24 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	25 min
Jun 24, 6:28 PM CDT	Severe Thunderstorm Warning	FGF	Steele	47 min
Jun 24, 8:40 PM CDT	Severe Thunderstorm Warning	FGF	Traill	35 min
Jun 26, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Walsh	35 min
Jun 27, 6:05 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	28 min
Jun 27, 8:06 PM CDT	Severe Thunderstorm Warning	FGF	Nelson	24 min
Jun 27, 8:33 PM CDT	Severe Thunderstorm Warning	FGF	Nelson	27 min
Jun 27, 8:55 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	18 min
Jun 28, 3:22 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	53 min
Jun 28, 3:57 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	48 min
Jun 28, 4:51 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	39 min
Jun 28, 5:05 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	40 min
Jun 28, 5:43 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	20 min
Jun 28, 7:47 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Nelson	28 min
Jun 28, 8:13 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	32 min
Jul 1, 7:08 PM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	52 min
Jul 1, 9:19 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	56 min
Jul 1, 10:15 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	60 min
Jul 1, 10:57 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Pierce, Rolette	63 min
Jul 2, 7:36 PM CDT	Severe Thunderstorm Warning	FGF	Towner	39 min
Jul 7, 2:29 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, McIntosh	46 min
Jul 7, 3:12 PM CDT	Severe Thunderstorm Warning	FGF	Ransom	30 min
Jul 11, 4:59 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	40 min
Jul 11, 6:05 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bowman, Slope	55 min
Jul 11, 6:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bowman, Golden Valley, Slope	63 min
Jul 11, 7:42 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Slope	63 min
Jul 11, 7:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Adams, Sioux	66 min
Jul 13, 2:33 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	57 min
Jul 13, 2:44 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Steele	46 min
Jul 13, 3:12 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Steele, Traill	48 min
Jul 13, 3:16 PM CDT	Severe Thunderstorm Warning	FGF	Cass	44 min
Jul 13, 3:34 PM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	56 min
Jul 13, 3:46 PM CDT	Severe Thunderstorm Warning	FGF	Cass	59 min
Jul 13, 3:52 PM CDT	Severe Thunderstorm Warning	FGF	Cass	53 min
Jul 13, 4:03 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	42 min
Jul 13, 4:20 PM CDT	Severe Thunderstorm Warning	FGF	Cass	55 min
Jul 13, 4:25 PM CDT	Severe Thunderstorm Warning	FGF	Cass	35 min
Jul 13, 4:39 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	66 min
Jul 18, 8:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Wells	43 min
Jul 18, 8:42 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Wells	48 min
Jul 18, 9:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Logan, McIntosh	51 min
Jul 18, 10:44 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	46 min
Jul 18, 11:13 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	47 min
Jul 23, 1:17 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie	58 min
Jul 25, 4:50 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	40 min
Jul 25, 5:23 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	45 min
Jul 25, 8:32 PM CDT	Severe Thunderstorm Warning	FGF	Richland	43 min
Jul 26, 4:53 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Grant, Morton, Sioux	42 min
Jul 26, 5:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Emmons, Morton	49 min
Jul 26, 6:03 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	42 min
Jul 26, 6:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Kidder, Stutsman	43 min
Jul 29, 6:07 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	53 min
Jul 29, 6:51 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	54 min
Jul 29, 6:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Billings, Golden Valley	66 min
Jul 29, 7:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Billings, Dunn, McKenzie	65 min
Jul 29, 7:50 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Billings, Golden Valley, Stark	55 min
Jul 29, 8:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Dunn	65 min
Jul 29, 8:28 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Hettinger, Slope, Stark	62 min
Jul 30, 6:11 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	49 min
Jul 30, 7:09 AM CDT	Severe Thunderstorm Warning	BIS	Grant	51 min
Jul 30, 7:31 AM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	44 min
Jul 30, 7:56 AM CDT	Severe Thunderstorm Warning	BIS	Sioux	49 min
Jul 30, 8:52 AM CDT	Severe Thunderstorm Warning	BIS	Sioux	53 min
Jul 30, 9:02 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	73 min
Jul 31, 5:28 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bottineau	62 min
Jul 31, 6:19 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bottineau, McHenry	56 min
Jul 31, 7:14 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Bottineau, McHenry, Pierce	46 min
Jul 31, 7:59 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	46 min
Jul 31, 8:10 PM CDT	Severe Thunderstorm Warning	BIS	Wells	65 min
Jul 31, 8:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	McHenry, Pierce	63 min
Jul 31, 9:11 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Wells	49 min
Jul 31, 9:30 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	60 min
Aug 1, 3:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Sioux	41 min
Aug 1, 4:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Grand Forks, Traill	55 min
Aug 1, 4:48 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	42 min
Aug 1, 5:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	McKenzie, Mountrail, Williams	63 min
Aug 1, 5:33 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	57 min
Aug 1, 6:22 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	68 min
Aug 1, 6:25 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	42 min
Aug 1, 6:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Dunn, McLean, Mercer, Mountrail	64 min
Aug 1, 7:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Dunn, McKenzie	66 min
Aug 1, 7:16 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	59 min
Aug 1, 7:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	McLean, Mercer	59 min
Aug 1, 7:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Stutsman	66 min
Aug 1, 8:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Billings, Dunn, McKenzie, Stark	74 min
Aug 1, 8:04 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, McLean, Mercer, Morton, Oliver	56 min
Aug 1, 8:23 PM CDT	Severe Thunderstorm Warning	FGF	Richland	34 min
Aug 1, 8:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Stark	26 min
Aug 1, 8:55 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Morton, Oliver	65 min
Aug 1, 9:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Mercer, Morton, Oliver	59 min
Aug 1, 9:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Grant, Hettinger, Morton, Stark	78 min
Aug 1, 9:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Kidder	66 min
Aug 1, 9:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Morton, Oliver	52 min
Aug 1, 10:02 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	58 min
Aug 1, 10:24 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	56 min
Aug 10, 5:32 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	31 min
Aug 10, 6:08 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	37 min
Aug 10, 6:33 PM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	57 min
Aug 10, 6:37 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	38 min
Aug 10, 7:10 PM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	35 min
Aug 10, 7:31 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	McHenry, Ward	44 min
Aug 10, 8:30 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Sheridan, Ward	30 min
Aug 23, 7:57 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	48 min
Aug 23, 8:43 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Sheridan, Ward	27 min
Aug 23, 9:25 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Sheridan	35 min
Aug 24, 1:45 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer	60 min
Aug 24, 2:44 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	20 min
Aug 24, 3:32 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	58 min
Aug 24, 3:42 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	63 min
Aug 24, 4:09 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	51 min
Aug 24, 4:34 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	41 min
Aug 24, 4:52 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	42 min
Aug 24, 6:08 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Morton, Oliver	67 min
Aug 24, 6:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, McLean, Morton, Oliver	58 min
Aug 30, 7:20 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	40 min
Aug 30, 7:45 PM CDT	Severe Thunderstorm Warning	BIS	Williams	42 min
Aug 30, 7:59 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	39 min
Aug 30, 9:36 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	39 min
Aug 30, 10:07 PM CDT	Severe Thunderstorm Warning	BIS	Divide, McKenzie, Williams	53 min
Aug 30, 10:58 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	62 min
Sep 4, 6:31 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Stark	59 min
Sep 4, 6:34 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Adams, Grant, Hettinger, Sioux	56 min
Sep 4, 7:05 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Mercer, Morton, Oliver	55 min
Sep 4, 7:21 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Emmons, Grant, Hettinger, Morton, Sioux	54 min
Sep 4, 8:06 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Emmons, Grant, Morton, Oliver, Sioux	54 min
Sep 4, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Oliver	46 min
Sep 4, 8:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Burleigh, Emmons, Kidder, Logan, McLean, Morton and 3 more	59 min
Sep 4, 9:27 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Foster, Kidder, Sheridan, Stutsman, Wells	93 min
Sep 4, 10:01 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	59 min
Sep 4, 10:34 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Griggs, Nelson, Steele	26 min
Sep 4, 10:58 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Benson, Cavalier, Eddy, Griggs, Nelson and 4 more	47 min
Sep 4, 11:39 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Benson, Cavalier, Eddy, Grand Forks, Griggs and 6 more	66 min
Sep 4, 11:47 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	28 min
Sep 5, 12:24 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Grand Forks, Pembina, Traill, Walsh	66 min
Sep 5, 12:34 AM CDT	Severe Thunderstorm Warning Destructive damage threat	FGF	Grand Forks	41 min
Sep 29, 7:02 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	43 min
Sep 29, 7:26 AM CDT	Severe Thunderstorm Warning	FGF	Richland	19 min
Sep 29, 7:41 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	49 min
Oct 3, 7:31 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	44 min
Oct 3, 8:04 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey, Walsh	41 min
Oct 3, 8:29 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey, Walsh	17 min

By county

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

11 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 2022 2024

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.