Alert archive / North Dakota / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in North Dakota, 2013

308 severe thunderstorm warnings in 2013. 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 2013. Tap one for its archive.

Severe Thunderstorm Warnings: 308
Busiest month: July94 severe thunderstorm warnings
Busiest day: July 9, 201323 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.

195 of 308 severe thunderstorm warnings covering North Dakota in 2013 had a qualifying storm report inside them; 344 of 396 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.

North Dakota, 2013

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	308	195	37%	396	87%	24 min

Each office's whole area, 2013

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Forks, ND: severe thunderstorm warnings	125	99	21%	264	74%	25 min
NWS Bismarck, ND: severe thunderstorm warnings	239	139	42%	276	90%	24 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 14, 12:47 AM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	58 min
May 14, 6:18 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	42 min
May 17, 7:39 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	36 min
May 17, 9:07 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	38 min
May 17, 9:37 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	53 min
May 17, 10:19 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	41 min
May 18, 6:15 PM CDT	Severe Thunderstorm Warning	BIS	Grant	60 min
May 18, 7:09 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	51 min
May 18, 8:12 PM CDT	Severe Thunderstorm Warning	BIS	Kidder	63 min
May 18, 8:50 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	55 min
May 18, 9:22 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	53 min
May 18, 9:35 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, Slope	40 min
May 18, 9:43 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	32 min
May 18, 10:15 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	60 min
May 25, 9:08 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie	52 min
May 25, 2:34 PM CDT	Severe Thunderstorm Warning	BIS	Stark	41 min
May 25, 3:34 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	41 min
May 25, 3:55 PM CDT	Severe Thunderstorm Warning	BIS	Adams	20 min
May 25, 4:12 PM CDT	Severe Thunderstorm Warning	BIS	Adams	48 min
May 25, 5:00 PM CDT	Severe Thunderstorm Warning	BIS	Adams	45 min
May 25, 5:32 PM CDT	Severe Thunderstorm Warning	BIS	Grant	43 min
May 25, 5:44 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	46 min
May 25, 6:16 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	44 min
May 25, 6:44 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	46 min
May 25, 7:32 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	43 min
May 25, 7:45 PM CDT	Severe Thunderstorm Warning	BIS	Morton	30 min
May 25, 8:03 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	42 min
May 25, 8:09 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	51 min
May 25, 8:15 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	30 min
May 25, 9:33 PM CDT	Severe Thunderstorm Warning	BIS	Sioux	57 min
Jun 3, 4:47 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	58 min
Jun 3, 6:31 PM CDT	Severe Thunderstorm Warning	BIS	Adams	44 min
Jun 9, 9:42 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Williams	48 min
Jun 14, 4:01 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Mountrail, Williams	59 min
Jun 19, 10:20 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	55 min
Jun 19, 11:16 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	44 min
Jun 19, 11:18 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	42 min
Jun 19, 11:43 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	62 min
Jun 20, 12:31 AM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	44 min
Jun 20, 12:56 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure	64 min
Jun 20, 1:53 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Stutsman	67 min
Jun 20, 4:12 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	63 min
Jun 20, 4:20 AM CDT	Severe Thunderstorm Warning	BIS	Hettinger	55 min
Jun 20, 10:41 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	49 min
Jun 20, 11:00 AM CDT	Severe Thunderstorm Warning	BIS	McHenry	60 min
Jun 20, 3:51 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	39 min
Jun 20, 4:30 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	60 min
Jun 20, 5:16 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Steele, Traill	44 min
Jun 20, 5:30 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	60 min
Jun 20, 5:31 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	44 min
Jun 20, 5:54 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	51 min
Jun 20, 6:05 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	40 min
Jun 20, 6:17 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	43 min
Jun 20, 6:29 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	46 min
Jun 20, 6:42 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	48 min
Jun 20, 6:49 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	41 min
Jun 20, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Steele	50 min
Jun 20, 7:31 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	59 min
Jun 20, 7:47 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	58 min
Jun 20, 8:11 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan, McIntosh	64 min
Jun 20, 8:12 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	48 min
Jun 20, 8:52 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan	53 min
Jun 20, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	60 min
Jun 20, 9:20 PM CDT	Severe Thunderstorm Warning	FGF	Cass	40 min
Jun 20, 9:35 PM CDT	Severe Thunderstorm Warning	FGF	Cass	55 min
Jun 20, 9:44 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Stutsman	61 min
Jun 20, 9:44 PM CDT	Severe Thunderstorm Warning	FGF	Cass	46 min
Jun 20, 10:05 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	55 min
Jun 20, 10:17 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	58 min
Jun 20, 10:44 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Sargent	61 min
Jun 20, 11:31 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	59 min
Jun 21, 11:08 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	52 min
Jun 21, 12:01 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	44 min
Jun 21, 12:05 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	55 min
Jun 21, 12:43 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	47 min
Jun 21, 12:57 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	48 min
Jun 21, 1:19 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry	56 min
Jun 21, 11:08 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	67 min
Jun 22, 12:11 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	64 min
Jun 22, 6:36 PM CDT	Severe Thunderstorm Warning	BIS	Logan, McIntosh	54 min
Jun 22, 7:29 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Kidder, Logan	61 min
Jun 22, 7:59 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	61 min
Jun 22, 8:13 PM CDT	Severe Thunderstorm Warning	BIS	Kidder	62 min
Jun 22, 8:30 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	60 min
Jun 22, 8:30 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton, Sioux	60 min
Jun 22, 8:43 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	47 min
Jun 22, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	45 min
Jun 22, 9:17 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Wells	58 min
Jun 22, 9:25 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Burleigh, Emmons, Grant, Hettinger, Morton and 3 more	50 min
Jun 22, 10:03 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan, Wells	57 min
Jun 22, 10:14 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Kidder, Logan, McLean, Mercer and 2 more	61 min
Jun 22, 10:47 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	58 min
Jun 22, 10:49 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, McLean, Sheridan, Stutsman, Wells	56 min
Jun 23, 12:36 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Towner	39 min
Jun 23, 1:06 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	39 min
Jun 25, 4:01 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	59 min
Jun 25, 4:26 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Morton, Sioux	64 min
Jun 25, 4:45 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Sheridan	60 min
Jun 25, 5:19 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	56 min
Jun 25, 5:35 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan	55 min
Jun 25, 6:04 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons	56 min
Jun 25, 6:45 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Kidder	60 min
Jun 25, 6:57 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey, Towner	63 min
Jun 25, 7:11 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	64 min
Jun 25, 7:53 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	52 min
Jun 25, 8:00 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey, Towner	45 min
Jun 25, 8:15 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	45 min
Jun 25, 8:44 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	61 min
Jun 25, 9:42 PM CDT	Severe Thunderstorm Warning	FGF	Richland	48 min
Jun 25, 11:39 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	51 min
Jun 26, 12:35 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Traill	55 min
Jun 26, 3:24 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	66 min
Jun 26, 4:07 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	38 min
Jul 5, 4:41 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail	49 min
Jul 5, 5:25 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	50 min
Jul 5, 6:08 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	37 min
Jul 5, 6:40 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	50 min
Jul 5, 7:14 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Renville, Ward	46 min
Jul 6, 7:00 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan, Wells	60 min
Jul 6, 7:49 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan, Wells	56 min
Jul 6, 8:58 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	62 min
Jul 6, 11:38 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey, Towner	67 min
Jul 8, 6:45 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	60 min
Jul 8, 7:12 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	63 min
Jul 8, 7:28 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Golden Valley, McKenzie	62 min
Jul 8, 8:07 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Bowman, Golden Valley, Slope, Stark	53 min
Jul 8, 8:24 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McLean	66 min
Jul 8, 8:51 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	54 min
Jul 8, 8:57 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Hettinger, Slope, Stark	63 min
Jul 8, 9:08 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Oliver	52 min
Jul 8, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Bowman, Golden Valley, Slope	60 min
Jul 8, 9:32 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger, Mercer, Morton, Stark	58 min
Jul 8, 9:48 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer, Mountrail, Oliver, Stark and 1 more	57 min
Jul 8, 10:18 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Grant, McLean, Morton, Oliver and 2 more	57 min
Jul 8, 10:46 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Sheridan, Ward	59 min
Jul 9, 12:43 AM CDT	Severe Thunderstorm Warning	BIS	Foster	47 min
Jul 9, 12:49 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	41 min
Jul 9, 1:27 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Walsh	48 min
Jul 9, 3:06 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Oliver	39 min
Jul 9, 3:35 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	25 min
Jul 9, 3:53 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	52 min
Jul 9, 4:38 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	37 min
Jul 9, 5:07 PM CDT	Severe Thunderstorm Warning	BIS	Logan, McIntosh	38 min
Jul 9, 5:35 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan, McIntosh	40 min
Jul 9, 5:48 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, McIntosh	57 min
Jul 9, 6:09 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	51 min
Jul 11, 5:33 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	42 min
Jul 11, 5:46 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	44 min
Jul 11, 6:25 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	50 min
Jul 11, 6:36 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope, Stark	39 min
Jul 11, 6:58 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, Mountrail, Williams	47 min
Jul 11, 7:15 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Stark	45 min
Jul 11, 7:28 PM CDT	Severe Thunderstorm Warning	BIS	Burke, McKenzie, Mountrail, Williams	47 min
Jul 11, 7:54 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Grant, Mercer, Morton, Oliver, Stark	66 min
Jul 12, 4:47 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	58 min
Jul 12, 6:54 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	51 min
Jul 12, 8:56 PM CDT	Severe Thunderstorm Warning	FGF	Richland	49 min
Jul 13, 4:44 PM CDT	Severe Thunderstorm Warning	BIS	Williams	46 min
Jul 13, 4:49 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	41 min
Jul 13, 5:24 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	51 min
Jul 13, 5:29 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	46 min
Jul 13, 6:09 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	51 min
Jul 13, 6:13 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Mountrail, Williams	47 min
Jul 13, 6:48 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	57 min
Jul 13, 7:07 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Burke, McHenry, Renville, Ward	38 min
Jul 13, 7:41 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Renville, Ward	49 min
Jul 13, 7:51 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	54 min
Jul 13, 8:17 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Pierce, Rolette	58 min
Jul 13, 9:04 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	56 min
Jul 13, 10:01 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	44 min
Jul 15, 8:00 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	60 min
Jul 15, 8:33 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Mountrail, Williams	57 min
Jul 15, 9:35 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	55 min
Jul 15, 10:36 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Renville, Ward	54 min
Jul 16, 2:37 AM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	53 min
Jul 17, 5:26 PM CDT	Severe Thunderstorm Warning	BIS	Kidder	64 min
Jul 17, 6:44 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Sheridan	61 min
Jul 17, 7:40 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	65 min
Jul 17, 8:18 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Sheridan	57 min
Jul 19, 4:01 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Ward	44 min
Jul 19, 5:05 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	55 min
Jul 19, 6:48 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	42 min
Jul 21, 2:51 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	54 min
Jul 21, 3:07 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	68 min
Jul 21, 3:19 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Williams	26 min
Jul 21, 3:24 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Ward	66 min
Jul 21, 3:39 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	66 min
Jul 21, 3:44 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	61 min
Jul 21, 4:06 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, McLean, Mountrail	54 min
Jul 21, 4:45 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Oliver	60 min
Jul 21, 4:58 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	62 min
Jul 21, 5:07 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Stark	38 min
Jul 21, 5:43 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	62 min
Jul 21, 6:38 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Grant, Morton, Oliver, Sioux	52 min
Jul 21, 6:39 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	66 min
Jul 21, 7:08 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	67 min
Jul 21, 7:19 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Morton, Sioux	56 min
Jul 21, 7:23 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	67 min
Jul 21, 8:07 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	53 min
Jul 21, 9:02 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey, Towner, Walsh	58 min
Jul 21, 9:59 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Ramsey, Walsh	61 min
Jul 21, 11:00 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	60 min
Jul 21, 11:17 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure	58 min
Jul 21, 11:54 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	51 min
Jul 23, 7:27 PM CDT	Severe Thunderstorm Warning	BIS	Grant	63 min
Jul 29, 1:58 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	47 min
Jul 31, 12:16 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	44 min
Aug 3, 10:16 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, Slope	59 min
Aug 4, 6:46 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	44 min
Aug 4, 7:19 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	41 min
Aug 4, 7:27 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Grant, Morton, Sioux	63 min
Aug 5, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Bowman, Golden Valley, Slope	45 min
Aug 5, 7:52 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	38 min
Aug 5, 8:13 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville	47 min
Aug 5, 8:47 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville, Ward	43 min
Aug 6, 3:26 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom	64 min
Aug 6, 4:28 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	62 min
Aug 6, 5:51 PM CDT	Severe Thunderstorm Warning	FGF	Richland	54 min
Aug 6, 9:30 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	60 min
Aug 6, 10:24 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	51 min
Aug 10, 3:08 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	67 min
Aug 10, 3:58 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	62 min
Aug 10, 4:39 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	66 min
Aug 10, 5:02 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	58 min
Aug 10, 5:57 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	48 min
Aug 10, 6:15 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	45 min
Aug 10, 7:22 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Slope, Stark	38 min
Aug 10, 9:39 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	21 min
Aug 18, 7:30 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	60 min
Aug 18, 10:45 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	60 min
Aug 25, 3:24 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	66 min
Aug 25, 3:37 AM CDT	Severe Thunderstorm Warning	FGF	Cass	53 min
Aug 26, 5:41 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	64 min
Aug 26, 6:21 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	54 min
Aug 26, 7:16 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide	59 min
Aug 26, 7:53 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Williams	22 min
Aug 26, 8:39 PM CDT	Severe Thunderstorm Warning	BIS	Burke	66 min
Aug 27, 2:41 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	49 min
Aug 27, 4:07 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	38 min
Aug 27, 4:43 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	62 min
Aug 27, 5:01 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	59 min
Aug 28, 5:05 PM CDT	Severe Thunderstorm Warning	FGF	Walsh	55 min
Aug 29, 12:00 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	60 min
Aug 29, 12:36 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	54 min
Aug 29, 1:03 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Golden Valley, McKenzie	57 min
Aug 29, 1:42 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	63 min
Aug 29, 1:48 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland	57 min
Aug 29, 1:58 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McLean, Mercer, Stark	62 min
Aug 29, 2:01 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide	59 min
Aug 29, 2:34 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Morton, Oliver, Stark	56 min
Aug 29, 3:17 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Morton, Oliver, Sheridan	58 min
Aug 29, 3:23 AM CDT	Severe Thunderstorm Warning	FGF	Cass	52 min
Aug 29, 4:12 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	63 min
Aug 29, 4:36 AM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	54 min
Aug 29, 5:19 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Wells	26 min
Aug 29, 5:22 AM CDT	Severe Thunderstorm Warning	FGF	Eddy	38 min
Aug 29, 5:51 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Steele	54 min
Aug 29, 6:46 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill, Walsh	59 min
Aug 30, 5:31 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Stark	59 min
Aug 30, 5:52 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	38 min
Aug 30, 6:01 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	59 min
Aug 30, 6:22 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	38 min
Aug 30, 6:23 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	52 min
Aug 30, 6:49 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	56 min
Aug 30, 6:57 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	48 min
Aug 30, 7:00 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	60 min
Aug 30, 7:33 PM CDT	Severe Thunderstorm Warning	BIS	Rolette	57 min
Aug 30, 7:35 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Ward	55 min
Aug 30, 7:37 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	53 min
Aug 30, 7:48 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	57 min
Aug 30, 8:03 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	27 min
Aug 30, 8:21 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	39 min
Aug 30, 8:25 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	65 min
Aug 30, 8:29 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	46 min
Aug 30, 8:59 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	31 min
Aug 30, 9:06 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	54 min
Aug 30, 9:50 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	55 min
Aug 30, 10:45 PM CDT	Severe Thunderstorm Warning	BIS	Pierce	45 min
Aug 31, 3:51 PM CDT	Severe Thunderstorm Warning	FGF	Richland	24 min
Aug 31, 5:23 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	67 min
Sep 6, 9:14 AM CDT	Severe Thunderstorm Warning	BIS	Bowman	46 min
Sep 6, 9:39 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	51 min
Sep 7, 3:10 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	50 min
Sep 7, 3:58 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Steele	32 min
Sep 7, 4:50 PM CDT	Severe Thunderstorm Warning	BIS	Bowman, Slope	55 min
Sep 7, 5:42 PM CDT	Severe Thunderstorm Warning	BIS	Bowman, Slope	63 min
Sep 7, 6:41 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	64 min
Sep 9, 2:24 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, McIntosh	51 min
Sep 9, 2:50 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Logan, McIntosh, Stutsman	55 min
Sep 9, 3:27 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Ransom, Sargent	48 min
Sep 9, 4:08 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	67 min
Sep 9, 5:23 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Ward	52 min
Sep 18, 12:45 AM CDT	Severe Thunderstorm Warning	BIS	Divide	45 min
Sep 18, 5:56 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	64 min
Sep 18, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	64 min
Sep 18, 7:41 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	49 min
Sep 18, 8:01 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	59 min
Sep 18, 8:28 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Williams	62 min
Sep 18, 8:45 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan, McIntosh	60 min
Sep 18, 8:49 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	56 min
Sep 18, 9:26 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	64 min
Sep 18, 9:41 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	64 min
Sep 18, 9:57 PM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	63 min
Sep 18, 10:06 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail, Renville, Ward	54 min
Sep 18, 10:11 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	64 min
Sep 18, 10:49 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	56 min
Sep 18, 11:36 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	54 min
Sep 18, 11:43 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	62 min

By county

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

13 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 2012 2014

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.