Alert archive / North Dakota / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in North Dakota, 2018

370 severe thunderstorm warnings in 2018. 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 2018. Tap one for its archive.

Severe Thunderstorm Warnings: 370
Busiest month: June170 severe thunderstorm warnings
Busiest day: June 29, 201843 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.

250 of 370 severe thunderstorm warnings covering North Dakota in 2018 had a qualifying storm report inside them; 529 of 603 hail, wind and damage reports fell inside a warning, on average 26 minutes after it went out.

North Dakota, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	370	250	32%	603	88%	26 min

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Forks, ND: severe thunderstorm warnings	188	168	11%	533	84%	26 min
NWS Bismarck, ND: severe thunderstorm warnings	275	164	40%	315	90%	28 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 7, 6:10 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	39 min
May 17, 8:41 AM CDT	Severe Thunderstorm Warning	BIS	McHenry	64 min
May 17, 3:26 PM CDT	Severe Thunderstorm Warning	BIS	Sioux	64 min
May 17, 3:36 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, Logan, McIntosh	54 min
May 17, 4:52 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	45 min
May 17, 5:27 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	36 min
May 22, 5:47 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	58 min
May 22, 6:33 PM CDT	Severe Thunderstorm Warning	BIS	Grant	57 min
May 22, 6:42 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	63 min
May 22, 6:45 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	43 min
May 22, 7:00 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	60 min
May 22, 7:22 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	53 min
May 22, 8:12 PM CDT	Severe Thunderstorm Warning	BIS	Oliver	31 min
May 24, 8:24 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier	36 min
May 27, 12:06 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie	54 min
May 27, 12:55 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	65 min
May 27, 1:43 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	62 min
May 27, 2:44 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	46 min
May 27, 3:28 AM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Mercer, Ward	62 min
May 27, 5:20 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Kidder, Stutsman, Wells	55 min
May 28, 4:29 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	31 min
May 28, 6:34 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	41 min
May 28, 7:15 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	45 min
May 28, 8:01 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer	37 min
May 30, 10:02 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	58 min
May 31, 3:00 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie	41 min
May 31, 2:41 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	64 min
May 31, 3:28 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Stark	47 min
May 31, 4:12 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	48 min
May 31, 4:17 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Oliver	58 min
May 31, 4:40 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Slope, Stark	65 min
May 31, 5:29 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Stark	46 min
May 31, 5:41 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Slope, Stark	64 min
May 31, 6:28 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	62 min
May 31, 6:43 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger, Morton, Stark	62 min
May 31, 7:00 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	60 min
May 31, 7:42 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	63 min
May 31, 8:32 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	58 min
May 31, 8:48 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	27 min
Jun 1, 6:56 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	64 min
Jun 1, 3:52 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	25 min
Jun 1, 4:07 PM CDT	Severe Thunderstorm Warning	BIS	Billings, McKenzie	53 min
Jun 1, 5:01 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	59 min
Jun 1, 5:22 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	38 min
Jun 1, 5:25 PM CDT	Severe Thunderstorm Warning	BIS	Williams	35 min
Jun 1, 5:29 PM CDT	Severe Thunderstorm Warning	BIS	Williams	61 min
Jun 1, 5:48 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	57 min
Jun 1, 6:07 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	38 min
Jun 1, 6:14 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	61 min
Jun 1, 6:30 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Mountrail, Ward	60 min
Jun 1, 6:42 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail, Ward	63 min
Jun 1, 7:11 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Morton, Oliver	41 min
Jun 1, 8:17 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Logan, Stutsman	58 min
Jun 1, 9:43 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	32 min
Jun 5, 9:16 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	59 min
Jun 5, 10:47 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	58 min
Jun 5, 10:53 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	37 min
Jun 5, 10:59 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Logan, McIntosh	48 min
Jun 5, 11:10 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Griggs, Steele	35 min
Jun 5, 11:21 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	37 min
Jun 5, 11:22 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Grand Forks, Griggs, Steele, Traill	38 min
Jun 5, 11:40 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland	65 min
Jun 5, 11:56 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	64 min
Jun 6, 12:21 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	39 min
Jun 7, 10:42 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	40 min
Jun 8, 4:23 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill	52 min
Jun 9, 1:04 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Stark	56 min
Jun 9, 6:37 PM CDT	Severe Thunderstorm Warning	FGF	Cass	23 min
Jun 9, 6:59 PM CDT	Severe Thunderstorm Warning	FGF	Cass	31 min
Jun 10, 5:38 PM CDT	Severe Thunderstorm Warning	BIS	Burke	67 min
Jun 10, 6:06 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	54 min
Jun 10, 6:33 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	57 min
Jun 10, 6:38 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville, Ward	37 min
Jun 10, 6:43 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger	62 min
Jun 10, 6:52 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	53 min
Jun 10, 7:02 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	43 min
Jun 10, 7:14 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville	31 min
Jun 10, 7:17 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	58 min
Jun 10, 7:24 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	66 min
Jun 10, 7:46 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	59 min
Jun 10, 8:21 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Mercer, Morton, Oliver	54 min
Jun 10, 8:29 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	46 min
Jun 10, 8:42 PM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	33 min
Jun 14, 10:56 AM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	49 min
Jun 14, 11:44 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail, Williams	46 min
Jun 14, 12:28 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail, Ward, Williams	47 min
Jun 14, 3:59 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Rolette	61 min
Jun 14, 4:17 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	43 min
Jun 14, 4:43 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide	62 min
Jun 14, 4:57 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	63 min
Jun 14, 5:42 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville	63 min
Jun 14, 5:57 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	63 min
Jun 14, 6:28 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville	47 min
Jun 14, 7:01 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	59 min
Jun 14, 7:12 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	63 min
Jun 14, 7:40 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	65 min
Jun 14, 7:44 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	61 min
Jun 14, 8:11 PM CDT	Severe Thunderstorm Warning	BIS	Rolette	64 min
Jun 14, 8:27 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer	63 min
Jun 14, 8:43 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Pierce, Rolette	62 min
Jun 14, 8:54 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	66 min
Jun 14, 9:04 PM CDT	Severe Thunderstorm Warning	BIS	Ward	56 min
Jun 14, 9:23 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	67 min
Jun 14, 9:24 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	38 min
Jun 14, 9:34 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	18 min
Jun 14, 9:44 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Rolette	33 min
Jun 14, 9:51 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	39 min
Jun 14, 9:59 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	61 min
Jun 14, 10:29 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	46 min
Jun 14, 10:41 PM CDT	Severe Thunderstorm Warning	BIS	Pierce	37 min
Jun 14, 10:42 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey	33 min
Jun 14, 11:11 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	49 min
Jun 14, 11:15 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	45 min
Jun 14, 11:57 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Nelson, Ramsey, Walsh	48 min
Jun 14, 11:59 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	46 min
Jun 15, 12:17 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom	28 min
Jun 15, 12:40 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	42 min
Jun 15, 1:01 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	44 min
Jun 15, 1:55 AM CDT	Severe Thunderstorm Warning	FGF	Cass	34 min
Jun 16, 7:19 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	41 min
Jun 16, 7:44 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland, Sargent	46 min
Jun 16, 8:23 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	42 min
Jun 16, 10:03 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	57 min
Jun 16, 10:56 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	52 min
Jun 16, 6:06 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Steele, Traill	26 min
Jun 16, 9:02 PM CDT	Severe Thunderstorm Warning	FGF	Richland	58 min
Jun 26, 4:07 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	53 min
Jun 26, 4:58 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	62 min
Jun 26, 6:24 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer	29 min
Jun 26, 6:29 PM CDT	Severe Thunderstorm Warning	BIS	Slope	61 min
Jun 26, 6:47 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	58 min
Jun 26, 7:11 PM CDT	Severe Thunderstorm Warning	BIS	Ward	47 min
Jun 26, 7:26 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope, Stark	64 min
Jun 26, 7:29 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry	34 min
Jun 26, 7:31 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	59 min
Jun 26, 8:11 PM CDT	Severe Thunderstorm Warning	BIS	Stark	64 min
Jun 26, 8:17 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	58 min
Jun 26, 8:33 PM CDT	Severe Thunderstorm Warning	BIS	Adams	57 min
Jun 26, 8:44 PM CDT	Severe Thunderstorm Warning	BIS	Mercer	40 min
Jun 26, 9:55 PM CDT	Severe Thunderstorm Warning	BIS	Mercer	54 min
Jun 26, 10:17 PM CDT	Severe Thunderstorm Warning	BIS	Slope	58 min
Jun 26, 10:39 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	54 min
Jun 26, 10:48 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	57 min
Jun 26, 10:51 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Stark	54 min
Jun 26, 11:09 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	66 min
Jun 26, 11:23 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger, Morton	67 min
Jun 26, 11:28 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	25 min
Jun 26, 11:56 PM CDT	Severe Thunderstorm Warning	BIS	Adams	31 min
Jun 28, 2:52 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh	53 min
Jun 28, 5:57 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Slope	63 min
Jun 28, 7:02 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	58 min
Jun 28, 8:00 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	60 min
Jun 28, 8:56 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	64 min
Jun 28, 9:58 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	47 min
Jun 28, 10:37 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	53 min
Jun 28, 1:41 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill	34 min
Jun 28, 2:13 PM CDT	Severe Thunderstorm Warning	FGF	Traill	47 min
Jun 28, 3:05 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	40 min
Jun 28, 3:40 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Walsh	50 min
Jun 28, 4:17 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	43 min
Jun 28, 5:04 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	23 min
Jun 28, 6:32 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	58 min
Jun 28, 7:09 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce, Sheridan, Wells	66 min
Jun 28, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	60 min
Jun 28, 8:17 PM CDT	Severe Thunderstorm Warning	FGF	Benson	28 min
Jun 28, 8:24 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Sheridan, Wells	51 min
Jun 28, 8:47 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	58 min
Jun 28, 9:11 PM CDT	Severe Thunderstorm Warning	BIS	Wells	28 min
Jun 28, 9:16 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	59 min
Jun 28, 9:46 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Dunn, McKenzie, Mountrail, Williams	59 min
Jun 28, 10:07 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer	53 min
Jun 28, 10:36 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope	54 min
Jun 28, 10:41 PM CDT	Severe Thunderstorm Warning	BIS	Burke, McKenzie, Mountrail, Ward, Williams	64 min
Jun 28, 10:46 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie, McLean, Mercer, Mountrail	59 min
Jun 28, 11:19 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Renville, Ward	56 min
Jun 28, 11:26 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	64 min
Jun 28, 11:30 PM CDT	Severe Thunderstorm Warning	BIS	Stark	60 min
Jun 28, 11:38 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer, Oliver	67 min
Jun 29, 12:02 AM CDT	Severe Thunderstorm Warning	BIS	Morton	58 min
Jun 29, 12:10 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Pierce, Rolette	65 min
Jun 29, 12:17 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Morton, Sioux, Stark	58 min
Jun 29, 12:39 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Mercer, Oliver, Sheridan	66 min
Jun 29, 12:43 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	62 min
Jun 29, 1:11 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Pierce, Rolette	64 min
Jun 29, 1:14 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Grant, Morton, Sioux	61 min
Jun 29, 1:25 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Foster, Kidder, Sheridan, Stutsman, Wells	65 min
Jun 29, 1:45 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	30 min
Jun 29, 1:48 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	57 min
Jun 29, 2:08 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	67 min
Jun 29, 2:12 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, Emmons, Kidder, LaMoure, Logan, McIntosh and 1 more	63 min
Jun 29, 2:13 AM CDT	Severe Thunderstorm Warning	BIS	Pierce, Rolette	39 min
Jun 29, 2:23 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Kidder, Stutsman, Wells	37 min
Jun 29, 2:44 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	46 min
Jun 29, 2:45 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	45 min
Jun 29, 2:57 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	18 min
Jun 29, 2:59 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Grand Forks, Griggs, Steele, Traill	61 min
Jun 29, 3:15 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Grand Forks, Griggs, Nelson, Ramsey and 2 more	60 min
Jun 29, 3:16 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Sargent	59 min
Jun 29, 3:17 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	58 min
Jun 29, 3:30 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner, Walsh	45 min
Jun 29, 3:51 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	54 min
Jun 29, 3:58 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Walsh	47 min
Jun 29, 4:06 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	54 min
Jun 29, 4:25 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill, Walsh	65 min
Jun 29, 4:57 AM CDT	Severe Thunderstorm Warning	FGF	Richland	63 min
Jul 1, 7:35 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	40 min
Jul 2, 7:08 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	67 min
Jul 2, 8:06 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	54 min
Jul 2, 8:51 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	54 min
Jul 2, 8:53 PM CDT	Severe Thunderstorm Warning	BIS	Grant	67 min
Jul 2, 9:27 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	48 min
Jul 2, 9:59 PM CDT	Severe Thunderstorm Warning	FGF	Cass	46 min
Jul 2, 10:45 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	60 min
Jul 3, 1:10 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	65 min
Jul 3, 1:12 AM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, Slope	63 min
Jul 3, 1:37 AM CDT	Severe Thunderstorm Warning	BIS	Bowman, Slope	53 min
Jul 3, 2:18 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Billings, Bowman, Hettinger, Slope, Stark	57 min
Jul 3, 3:15 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Morton, Sioux, Stark	60 min
Jul 3, 3:51 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	54 min
Jul 3, 4:12 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Burleigh, Grant, Morton, Sioux	63 min
Jul 3, 5:03 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Grant, Morton, Sioux	57 min
Jul 3, 5:30 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Kidder, Logan, McIntosh, Stutsman	60 min
Jul 3, 6:13 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Logan, McIntosh, Stutsman	62 min
Jul 3, 9:48 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Slope	57 min
Jul 3, 10:21 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Slope, Stark	54 min
Jul 3, 10:24 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	66 min
Jul 3, 10:55 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	65 min
Jul 3, 11:30 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	48 min
Jul 3, 11:35 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	55 min
Jul 3, 11:43 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Oliver	62 min
Jul 3, 11:49 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	56 min
Jul 4, 12:16 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan, Wells	59 min
Jul 4, 12:46 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	44 min
Jul 4, 1:14 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Kidder, Stutsman, Wells	61 min
Jul 4, 1:24 AM CDT	Severe Thunderstorm Warning	BIS	McIntosh	44 min
Jul 4, 2:00 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Griggs, Nelson, Ramsey	45 min
Jul 4, 2:33 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 2 more	57 min
Jul 4, 2:37 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Grand Forks, Nelson, Ramsey, Towner and 1 more	53 min
Jul 4, 3:09 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	66 min
Jul 4, 3:20 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	33 min
Jul 4, 3:24 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	66 min
Jul 4, 3:27 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Grand Forks, Pembina, Ramsey, Walsh	63 min
Jul 4, 4:16 AM CDT	Severe Thunderstorm Warning	FGF	Pembina	59 min
Jul 7, 11:28 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	62 min
Jul 8, 12:08 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	67 min
Jul 8, 1:17 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	38 min
Jul 8, 1:31 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Kidder, Morton	59 min
Jul 8, 2:28 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Stutsman, Wells	62 min
Jul 8, 3:11 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Pierce, Wells	54 min
Jul 8, 3:18 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Grand Forks, Griggs, Nelson, Ramsey and 1 more	57 min
Jul 8, 4:13 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Grand Forks, Griggs, Nelson, Ramsey and 2 more	62 min
Jul 8, 4:52 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele	53 min
Jul 8, 5:55 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	65 min
Jul 8, 6:27 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	52 min
Jul 8, 7:10 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland	16 min
Jul 8, 7:37 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	23 min
Jul 9, 8:38 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	67 min
Jul 9, 9:42 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	63 min
Jul 9, 10:04 PM CDT	Severe Thunderstorm Warning	BIS	Williams	56 min
Jul 9, 10:41 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	64 min
Jul 9, 11:42 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	63 min
Jul 10, 12:43 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, Mountrail	62 min
Jul 10, 1:37 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	53 min
Jul 10, 2:18 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer	57 min
Jul 10, 2:46 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	59 min
Jul 10, 9:19 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	56 min
Jul 10, 10:09 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Mountrail, Renville, Ward, Williams	66 min
Jul 10, 11:07 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Burke, McHenry, Mountrail, Renville, Ward	53 min
Jul 14, 3:51 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer	54 min
Jul 14, 4:43 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	18 min
Jul 14, 4:59 PM CDT	Severe Thunderstorm Warning	BIS	Mercer	50 min
Jul 14, 5:08 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	37 min
Jul 14, 5:47 PM CDT	Severe Thunderstorm Warning	BIS	Pierce	43 min
Jul 14, 6:22 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce, Sheridan, Wells	53 min
Jul 14, 6:28 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger	62 min
Jul 14, 7:33 PM CDT	Severe Thunderstorm Warning	FGF	Towner	42 min
Jul 14, 7:36 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	54 min
Jul 14, 7:45 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	60 min
Jul 14, 7:49 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	41 min
Jul 18, 2:21 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	54 min
Jul 18, 2:44 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Williams	31 min
Jul 18, 3:55 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide	65 min
Jul 18, 4:56 PM CDT	Severe Thunderstorm Warning	BIS	Burke	31 min
Jul 19, 4:23 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Logan	67 min
Jul 19, 5:18 PM CDT	Severe Thunderstorm Warning	BIS	Logan, McIntosh	28 min
Jul 19, 5:57 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	24 min
Jul 19, 6:35 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	45 min
Jul 19, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	64 min
Jul 19, 7:09 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	66 min
Jul 19, 8:53 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan	67 min
Jul 21, 3:37 PM CDT	Severe Thunderstorm Warning	BIS	Williams	27 min
Jul 21, 4:55 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	65 min
Jul 21, 5:56 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	64 min
Jul 21, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, Williams	64 min
Jul 21, 7:12 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, Slope	48 min
Jul 21, 7:34 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope, Stark	36 min
Jul 21, 7:56 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn	64 min
Jul 21, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	31 min
Jul 22, 12:03 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	42 min
Jul 25, 12:16 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	33 min
Jul 25, 1:34 AM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	26 min
Jul 25, 1:58 AM CDT	Severe Thunderstorm Warning	BIS	Stutsman	32 min
Jul 29, 4:34 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan	19 min
Aug 3, 10:02 PM CDT	Severe Thunderstorm Warning	BIS	Bowman, Slope	58 min
Aug 3, 10:07 PM CDT	Severe Thunderstorm Warning	BIS	Adams	53 min
Aug 3, 10:11 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	34 min
Aug 3, 10:46 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	59 min
Aug 3, 11:20 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger	55 min
Aug 3, 11:47 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	58 min
Aug 4, 5:17 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Wells	58 min
Aug 4, 7:21 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Griggs, Nelson	54 min
Aug 4, 8:08 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Steele	40 min
Aug 19, 2:43 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	21 min
Aug 19, 4:19 AM CDT	Severe Thunderstorm Warning	FGF	Steele	26 min
Aug 23, 6:37 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	53 min
Aug 23, 7:36 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	38 min
Aug 23, 8:13 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	62 min
Aug 25, 9:36 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	33 min
Aug 25, 9:50 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	55 min
Aug 25, 9:54 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	23 min
Aug 25, 10:19 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	26 min
Aug 25, 10:42 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	63 min
Aug 25, 10:57 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	63 min
Aug 26, 2:05 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	25 min
Aug 26, 2:30 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	30 min
Aug 26, 3:12 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	33 min
Aug 26, 4:56 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	49 min
Aug 26, 8:16 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	59 min
Aug 26, 8:46 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Eddy, Ramsey, Towner	29 min
Aug 26, 8:55 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan, Stutsman	65 min
Aug 26, 9:14 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	31 min
Aug 26, 9:15 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Eddy, Grand Forks, Nelson, Pembina and 2 more	45 min
Aug 26, 9:44 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Stutsman	42 min
Aug 26, 9:58 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Grand Forks, Nelson, Pembina, Walsh	62 min
Aug 26, 10:46 PM CDT	Severe Thunderstorm Warning	FGF	Traill	44 min
Aug 27, 7:54 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom	51 min
Aug 27, 8:30 PM CDT	Severe Thunderstorm Warning	FGF	Cass	30 min
Aug 27, 8:56 PM CDT	Severe Thunderstorm Warning	FGF	Cass	64 min
Aug 31, 3:58 PM CDT	Severe Thunderstorm Warning	FGF	Richland	47 min
Aug 31, 4:43 PM CDT	Severe Thunderstorm Warning	FGF	Richland	44 min
Aug 31, 9:16 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	44 min
Sep 3, 6:55 PM CDT	Severe Thunderstorm Warning	BIS	Billings	50 min
Sep 3, 7:10 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Stark	65 min
Sep 3, 7:16 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn	59 min
Sep 3, 7:29 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Slope, Stark	61 min
Sep 3, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Bowman, Slope	28 min
Sep 3, 7:47 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	58 min
Sep 3, 7:58 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Stark	62 min
Sep 3, 8:09 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	66 min
Sep 3, 8:40 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Stark	50 min
Sep 3, 9:17 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	43 min
Sep 3, 9:22 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville, Ward	38 min
Sep 3, 9:23 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	52 min
Sep 6, 2:55 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Rolette	65 min
Sep 6, 2:57 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	63 min
Sep 6, 6:29 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Stark	61 min
Sep 6, 7:24 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	66 min
Sep 6, 8:30 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	43 min
Sep 9, 2:53 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh	54 min
Sep 9, 6:35 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Logan, McIntosh	55 min
Sep 9, 6:43 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	42 min
Sep 11, 5:32 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Walsh	58 min
Sep 11, 6:26 PM CDT	Severe Thunderstorm Warning	FGF	Walsh	23 min
Sep 12, 11:09 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	30 min
Sep 12, 11:15 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	60 min
Sep 14, 5:47 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Kidder, Logan	58 min
Sep 14, 6:34 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	56 min
Sep 14, 7:16 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	45 min
Sep 14, 8:28 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	47 min
Sep 14, 9:14 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	46 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 2017 2019

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.