Alert archive / North Dakota / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in North Dakota, 2019

361 severe thunderstorm warnings in 2019. 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 2019. Tap one for its archive.

Severe Thunderstorm Warnings: 361
Busiest month: July117 severe thunderstorm warnings
Busiest day: September 20, 201928 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.

256 of 361 severe thunderstorm warnings covering North Dakota in 2019 had a qualifying storm report inside them; 432 of 488 hail, wind and damage reports fell inside a warning, on average 21 minutes after it went out.

North Dakota, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	361	256	29%	488	89%	21 min

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Forks, ND: severe thunderstorm warnings	223	180	19%	428	85%	25 min
NWS Aberdeen, SD: severe thunderstorm warnings	199	126	37%	198	86%	18 min
NWS Bismarck, ND: severe thunderstorm warnings	241	156	35%	269	90%	18 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 15, 4:52 PM CDT	Severe Thunderstorm Warning	BIS	Morton	38 min
May 15, 5:24 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	66 min
May 15, 6:23 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	37 min
May 15, 6:24 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	66 min
May 15, 6:34 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	56 min
May 15, 6:49 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey, Walsh	41 min
May 15, 6:58 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	47 min
May 15, 7:04 PM CDT	Severe Thunderstorm Warning	BIS	Logan, McIntosh	56 min
May 15, 7:34 PM CDT	Severe Thunderstorm Warning	FGF	Eddy, Griggs, Nelson	41 min
May 15, 7:54 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	47 min
May 15, 8:06 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	39 min
May 15, 8:15 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	45 min
May 15, 8:17 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	43 min
May 15, 8:36 PM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	39 min
May 15, 8:53 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	52 min
May 15, 9:34 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	41 min
May 15, 9:38 PM CDT	Severe Thunderstorm Warning	FGF	Traill	37 min
May 15, 10:10 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	15 min
May 15, 11:18 PM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	42 min
May 24, 5:54 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Griggs, Steele	51 min
May 24, 6:24 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	51 min
May 24, 6:48 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	42 min
Jun 2, 4:48 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	42 min
Jun 2, 6:12 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Slope	48 min
Jun 2, 7:00 PM CDT	Severe Thunderstorm Warning	BIS	Slope	17 min
Jun 2, 7:11 PM CDT	Severe Thunderstorm Warning	BIS	Slope	49 min
Jun 2, 8:25 PM CDT	Severe Thunderstorm Warning	BIS	Bowman	50 min
Jun 3, 2:45 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	30 min
Jun 3, 3:18 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	42 min
Jun 3, 3:59 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	46 min
Jun 3, 6:09 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	51 min
Jun 3, 7:22 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	38 min
Jun 4, 6:07 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	53 min
Jun 7, 7:27 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	16 min
Jun 7, 7:49 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	41 min
Jun 7, 7:50 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey	15 min
Jun 7, 8:11 PM CDT	Severe Thunderstorm Warning	FGF	Ramsey	49 min
Jun 7, 8:29 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	46 min
Jun 7, 8:57 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	27 min
Jun 7, 9:11 PM CDT	Severe Thunderstorm Warning	FGF	Nelson, Walsh	49 min
Jun 8, 1:18 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	57 min
Jun 8, 1:21 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	54 min
Jun 8, 2:12 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	63 min
Jun 11, 2:28 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	47 min
Jun 11, 2:36 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	39 min
Jun 11, 3:19 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	23 min
Jun 13, 6:53 PM CDT	Severe Thunderstorm Warning	BIS	Foster	22 min
Jun 13, 6:59 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	46 min
Jun 13, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	35 min
Jun 14, 6:34 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	41 min
Jun 14, 8:15 PM CDT	Severe Thunderstorm Warning	BIS	McLean	45 min
Jun 27, 2:02 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	43 min
Jun 27, 6:02 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	43 min
Jun 28, 2:39 AM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, McKenzie	36 min
Jun 28, 5:56 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Oliver, Stark	64 min
Jun 28, 6:59 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	61 min
Jun 28, 7:54 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Morton, Sioux	66 min
Jun 28, 8:53 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan, McIntosh, Sioux	67 min
Jun 28, 9:58 AM CDT	Severe Thunderstorm Warning	BIS	McIntosh	45 min
Jun 29, 3:10 AM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	36 min
Jun 29, 3:53 AM CDT	Severe Thunderstorm Warning	BIS	Williams	52 min
Jun 29, 4:08 AM CDT	Severe Thunderstorm Warning	BIS	Mountrail	52 min
Jun 29, 4:40 AM CDT	Severe Thunderstorm Warning	BIS	Mountrail	65 min
Jun 29, 5:11 AM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	49 min
Jun 29, 5:29 AM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	61 min
Jun 29, 6:09 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Renville, Ward	66 min
Jun 29, 6:50 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Pierce, Rolette	55 min
Jun 29, 7:18 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	57 min
Jun 29, 7:43 AM CDT	Severe Thunderstorm Warning	BIS	Pierce, Rolette	32 min
Jun 29, 8:07 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	53 min
Jun 29, 8:45 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	45 min
Jun 29, 9:13 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Griggs, Nelson, Ramsey, Walsh	47 min
Jun 29, 9:58 AM CDT	Severe Thunderstorm Warning	FGF	Eddy, Grand Forks, Griggs, Nelson, Steele, Walsh	47 min
Jun 29, 10:01 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau	44 min
Jun 29, 10:39 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Steele, Traill, Walsh	31 min
Jun 29, 12:11 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	64 min
Jun 29, 12:33 PM CDT	Severe Thunderstorm Warning	FGF	Cass	57 min
Jun 29, 12:37 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	38 min
Jun 29, 12:53 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Steele, Traill	52 min
Jun 29, 1:32 PM CDT	Severe Thunderstorm Warning	FGF	Traill	43 min
Jun 29, 2:53 PM CDT	Severe Thunderstorm Warning	BIS	Divide	37 min
Jun 29, 3:26 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide	34 min
Jun 29, 6:11 PM CDT	Severe Thunderstorm Warning	BIS	Stark	49 min
Jun 29, 7:03 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	57 min
Jun 29, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Grant	60 min
Jun 29, 8:33 PM CDT	Severe Thunderstorm Warning	BIS	Morton	57 min
Jul 1, 9:59 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	61 min
Jul 2, 2:57 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	48 min
Jul 2, 4:02 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Slope	58 min
Jul 2, 4:59 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger	61 min
Jul 2, 5:08 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	52 min
Jul 2, 5:17 PM CDT	Severe Thunderstorm Warning	BIS	Sioux	43 min
Jul 2, 5:27 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, Slope	63 min
Jul 2, 5:43 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger	62 min
Jul 2, 6:11 PM CDT	Severe Thunderstorm Warning	BIS	Slope	53 min
Jul 2, 6:15 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Sioux	19 min
Jul 2, 6:29 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	61 min
Jul 2, 6:44 PM CDT	Severe Thunderstorm Warning	BIS	Grant	18 min
Jul 2, 6:54 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	51 min
Jul 2, 6:57 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	24 min
Jul 2, 7:32 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	58 min
Jul 2, 7:35 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	55 min
Jul 2, 7:43 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	47 min
Jul 2, 7:59 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	34 min
Jul 2, 8:41 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	44 min
Jul 2, 9:41 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	49 min
Jul 2, 10:55 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	50 min
Jul 2, 11:33 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Kidder, Logan	42 min
Jul 3, 5:21 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	54 min
Jul 3, 6:09 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	66 min
Jul 3, 6:22 PM CDT	Severe Thunderstorm Warning	FGF	Eddy, Grand Forks, Griggs, Nelson	53 min
Jul 3, 6:43 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	35 min
Jul 3, 6:43 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	62 min
Jul 3, 7:11 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Steele, Traill	64 min
Jul 3, 7:30 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	60 min
Jul 3, 8:21 PM CDT	Severe Thunderstorm Warning	FGF	Cass	54 min
Jul 3, 8:30 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	45 min
Jul 3, 8:54 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	66 min
Jul 3, 8:58 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	62 min
Jul 3, 9:14 PM CDT	Severe Thunderstorm Warning	FGF	Cass	41 min
Jul 3, 10:14 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	31 min
Jul 8, 5:37 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	38 min
Jul 8, 1:55 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	65 min
Jul 8, 2:13 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	62 min
Jul 8, 2:40 PM CDT	Severe Thunderstorm Warning	BIS	Stark	48 min
Jul 8, 2:41 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	34 min
Jul 8, 3:13 PM CDT	Severe Thunderstorm Warning	BIS	McLean	47 min
Jul 8, 3:22 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	53 min
Jul 8, 3:47 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	43 min
Jul 8, 4:04 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Wells	56 min
Jul 8, 4:07 PM CDT	Severe Thunderstorm Warning	FGF	Benson	53 min
Jul 8, 4:10 PM CDT	Severe Thunderstorm Warning	BIS	Morton	50 min
Jul 8, 4:11 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	49 min
Jul 8, 4:49 PM CDT	Severe Thunderstorm Warning	BIS	Divide	41 min
Jul 8, 4:51 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman, Wells	54 min
Jul 8, 4:53 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	52 min
Jul 8, 5:01 PM CDT	Severe Thunderstorm Warning	BIS	Morton	44 min
Jul 8, 5:28 PM CDT	Severe Thunderstorm Warning	BIS	Divide	47 min
Jul 8, 5:41 PM CDT	Severe Thunderstorm Warning	FGF	Nelson, Ramsey, Walsh	49 min
Jul 8, 5:44 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Grant, Morton, Sioux	41 min
Jul 8, 5:47 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	41 min
Jul 8, 5:49 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy	56 min
Jul 8, 6:19 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	56 min
Jul 8, 6:29 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Steele	61 min
Jul 8, 6:52 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele, Traill	38 min
Jul 8, 7:07 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill, Walsh	53 min
Jul 8, 7:51 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	54 min
Jul 8, 8:43 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	62 min
Jul 8, 9:43 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	62 min
Jul 8, 10:28 PM CDT	Severe Thunderstorm Warning	BIS	Bowman, Golden Valley, Slope	47 min
Jul 8, 10:42 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	63 min
Jul 8, 11:12 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope	27 min
Jul 12, 12:46 AM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	44 min
Jul 12, 1:24 AM CDT	Severe Thunderstorm Warning	BIS	Stutsman	36 min
Jul 12, 1:35 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Steele, Traill	40 min
Jul 12, 8:37 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	53 min
Jul 12, 9:23 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	67 min
Jul 12, 9:30 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	48 min
Jul 12, 10:10 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger	65 min
Jul 12, 10:16 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Oliver	44 min
Jul 12, 10:19 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	56 min
Jul 12, 11:08 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	24 min
Jul 12, 11:11 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	26 min
Jul 12, 11:15 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	60 min
Jul 13, 1:00 AM CDT	Severe Thunderstorm Warning	BIS	Hettinger	45 min
Jul 13, 1:02 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	43 min
Jul 13, 1:16 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh	44 min
Jul 13, 5:44 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville, Ward	61 min
Jul 13, 6:44 PM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	46 min
Jul 13, 7:47 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Walsh	28 min
Jul 13, 8:29 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	46 min
Jul 14, 7:26 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	29 min
Jul 14, 10:04 AM CDT	Severe Thunderstorm Warning	FGF	Walsh	23 min
Jul 14, 3:26 PM CDT	Severe Thunderstorm Warning	FGF	Richland	64 min
Jul 14, 4:28 PM CDT	Severe Thunderstorm Warning	FGF	Richland	62 min
Jul 15, 12:21 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Stark	54 min
Jul 15, 12:31 AM CDT	Severe Thunderstorm Warning	BIS	Bowman, Slope	44 min
Jul 15, 1:12 AM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Hettinger, McKenzie, Mercer, Slope and 1 more	63 min
Jul 15, 1:34 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Mercer, Morton, Oliver	56 min
Jul 15, 2:27 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Grant, McLean, Morton, Oliver and 1 more	63 min
Jul 16, 7:19 PM CDT	Severe Thunderstorm Warning	BIS	Grant	56 min
Jul 16, 8:00 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	45 min
Jul 16, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	46 min
Jul 16, 8:56 PM CDT	Severe Thunderstorm Warning	BIS	Hettinger	64 min
Jul 16, 9:59 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	61 min
Jul 17, 4:56 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	49 min
Jul 17, 6:17 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	58 min
Jul 17, 6:38 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Stark	67 min
Jul 17, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	32 min
Jul 17, 7:33 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	42 min
Jul 17, 7:34 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	56 min
Jul 17, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	19 min
Jul 17, 9:21 PM CDT	Severe Thunderstorm Warning	BIS	Morton	39 min
Jul 18, 2:02 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	58 min
Jul 18, 3:40 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	52 min
Jul 24, 10:57 PM CDT	Severe Thunderstorm Warning	BIS	Divide	63 min
Jul 25, 1:09 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Renville	51 min
Jul 28, 2:16 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Pembina, Walsh	59 min
Jul 28, 3:09 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	26 min
Jul 28, 3:28 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan	47 min
Jul 31, 5:43 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Slope, Stark	48 min
Jul 31, 5:47 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	58 min
Jul 31, 6:14 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail	46 min
Jul 31, 7:03 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	42 min
Jul 31, 7:43 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Renville, Ward	47 min
Jul 31, 8:02 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	58 min
Jul 31, 8:24 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville, Ward	51 min
Jul 31, 8:39 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Renville, Ward	66 min
Jul 31, 9:03 PM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	42 min
Jul 31, 9:42 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	63 min
Jul 31, 10:45 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	45 min
Jul 31, 11:09 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	51 min
Jul 31, 11:50 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	40 min
Aug 1, 12:14 AM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	25 min
Aug 1, 1:25 AM CDT	Severe Thunderstorm Warning	FGF	Ramsey, Walsh	35 min
Aug 1, 12:43 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	47 min
Aug 1, 1:10 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	50 min
Aug 1, 1:34 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	28 min
Aug 1, 1:59 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	46 min
Aug 1, 2:56 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	64 min
Aug 1, 3:31 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	44 min
Aug 1, 3:56 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	64 min
Aug 1, 4:54 PM CDT	Severe Thunderstorm Warning	BIS	McLean	51 min
Aug 3, 4:42 PM CDT	Severe Thunderstorm Warning	BIS	Burke	48 min
Aug 3, 4:51 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Slope	39 min
Aug 3, 5:04 PM CDT	Severe Thunderstorm Warning	BIS	Burke	41 min
Aug 3, 5:15 PM CDT	Severe Thunderstorm Warning	BIS	Slope	45 min
Aug 3, 5:37 PM CDT	Severe Thunderstorm Warning	BIS	Slope	23 min
Aug 3, 5:38 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail, Ward	52 min
Aug 3, 5:50 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Slope	55 min
Aug 3, 6:20 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer	55 min
Aug 3, 6:30 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	60 min
Aug 3, 6:42 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	34 min
Aug 3, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	32 min
Aug 4, 11:05 AM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	40 min
Aug 4, 10:48 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	57 min
Aug 4, 11:00 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	60 min
Aug 4, 11:17 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	43 min
Aug 4, 11:25 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	50 min
Aug 4, 11:34 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	41 min
Aug 4, 11:38 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	52 min
Aug 5, 12:08 AM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Williams	67 min
Aug 5, 12:22 AM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce, Sheridan, Wells	53 min
Aug 5, 12:35 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Ward	55 min
Aug 5, 12:57 AM CDT	Severe Thunderstorm Warning	BIS	Wells	48 min
Aug 5, 12:57 AM CDT	Severe Thunderstorm Warning	BIS	McHenry, McLean, Sheridan, Ward	48 min
Aug 5, 1:07 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy	53 min
Aug 5, 1:25 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Sheridan	50 min
Aug 5, 1:42 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Sheridan, Wells	52 min
Aug 5, 2:07 AM CDT	Severe Thunderstorm Warning	BIS	McLean	38 min
Aug 5, 5:02 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	43 min
Aug 6, 2:22 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer	38 min
Aug 6, 2:37 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Oliver	38 min
Aug 6, 3:02 PM CDT	Severe Thunderstorm Warning	BIS	Morton	43 min
Aug 6, 3:05 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Oliver	40 min
Aug 6, 3:11 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	64 min
Aug 6, 3:30 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	45 min
Aug 6, 3:36 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Morton, Sioux	34 min
Aug 6, 3:56 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	49 min
Aug 6, 4:14 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	46 min
Aug 6, 4:38 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton, Sioux	54 min
Aug 6, 5:34 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	56 min
Aug 6, 5:34 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	56 min
Aug 6, 6:49 PM CDT	Severe Thunderstorm Warning	BIS	Wells	26 min
Aug 6, 7:03 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	27 min
Aug 10, 8:48 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide	42 min
Aug 10, 9:51 AM CDT	Severe Thunderstorm Warning	BIS	Mountrail	24 min
Aug 10, 2:03 PM CDT	Severe Thunderstorm Warning	BIS	Stark	42 min
Aug 10, 2:35 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger, Stark	55 min
Aug 10, 3:15 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	45 min
Aug 11, 4:33 PM CDT	Severe Thunderstorm Warning	BIS	Adams	42 min
Aug 12, 6:43 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	62 min
Aug 12, 7:32 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Ward	58 min
Aug 15, 1:06 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	54 min
Aug 15, 3:24 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	37 min
Aug 17, 4:42 PM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	41 min
Aug 19, 7:04 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn	56 min
Aug 19, 8:09 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	24 min
Aug 19, 10:52 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	41 min
Aug 19, 11:04 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	56 min
Aug 20, 12:00 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	45 min
Aug 20, 12:13 AM CDT	Severe Thunderstorm Warning	BIS	Kidder	45 min
Aug 20, 12:44 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Nelson, Ramsey	61 min
Aug 20, 2:39 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	66 min
Aug 20, 3:10 AM CDT	Severe Thunderstorm Warning	FGF	Cass	53 min
Aug 20, 4:07 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	23 min
Aug 20, 4:25 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	65 min
Aug 24, 6:20 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail	25 min
Aug 25, 3:05 PM CDT	Severe Thunderstorm Warning	BIS	Morton	25 min
Aug 25, 3:33 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan	27 min
Aug 25, 3:59 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Sheridan, Wells	31 min
Aug 25, 4:19 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	56 min
Aug 25, 4:28 PM CDT	Severe Thunderstorm Warning	BIS	Pierce, Sheridan, Wells	47 min
Aug 25, 4:49 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	26 min
Aug 25, 5:10 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan	50 min
Aug 25, 5:56 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Logan	49 min
Aug 25, 5:59 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan, Wells	46 min
Aug 25, 6:16 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	44 min
Aug 26, 5:47 PM CDT	Severe Thunderstorm Warning	FGF	Traill	28 min
Sep 2, 10:54 AM CDT	Severe Thunderstorm Warning	BIS	Williams	36 min
Sep 2, 11:23 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Williams	52 min
Sep 2, 11:27 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	48 min
Sep 2, 11:31 AM CDT	Severe Thunderstorm Warning	BIS	Williams	44 min
Sep 2, 11:58 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail	32 min
Sep 2, 12:13 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	62 min
Sep 2, 12:18 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	42 min
Sep 2, 1:00 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, McLean, Mountrail	45 min
Sep 2, 1:45 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	45 min
Sep 2, 2:52 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Oliver	38 min
Sep 2, 3:02 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan, Wells	58 min
Sep 2, 3:39 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Kidder, Stutsman, Wells	21 min
Sep 2, 3:59 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Kidder, Stutsman	61 min
Sep 2, 4:43 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 2 more	62 min
Sep 2, 4:51 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, LaMoure, Logan, Stutsman	39 min
Sep 2, 5:29 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	61 min
Sep 2, 5:36 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Ransom, Richland, Sargent	54 min
Sep 2, 5:42 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Steele, Traill	63 min
Sep 2, 6:29 PM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	61 min
Sep 2, 7:27 PM CDT	Severe Thunderstorm Warning	FGF	Richland	33 min
Sep 17, 7:32 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	58 min
Sep 17, 8:48 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	57 min
Sep 17, 9:44 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	46 min
Sep 17, 10:24 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Mountrail, Williams	66 min
Sep 20, 12:26 AM CDT	Severe Thunderstorm Warning	BIS	Divide	40 min
Sep 20, 3:36 AM CDT	Severe Thunderstorm Warning	FGF	Sargent	39 min
Sep 20, 4:07 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	38 min
Sep 20, 7:59 AM CDT	Severe Thunderstorm Warning	FGF	Pembina	31 min
Sep 20, 8:12 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier	33 min
Sep 20, 8:32 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	43 min
Sep 20, 8:35 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	40 min
Sep 20, 8:59 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	61 min
Sep 20, 9:13 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	32 min
Sep 20, 11:26 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail	64 min
Sep 20, 12:18 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	43 min
Sep 20, 12:52 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	38 min
Sep 20, 1:23 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	43 min
Sep 20, 1:58 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Ward	62 min
Sep 20, 2:47 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Renville, Ward	43 min
Sep 20, 3:23 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	67 min
Sep 20, 3:27 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	63 min
Sep 20, 4:24 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	66 min
Sep 20, 4:35 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	55 min
Sep 20, 4:45 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton, Sioux	47 min
Sep 20, 4:59 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	46 min
Sep 20, 5:04 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	56 min
Sep 20, 5:07 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan	52 min
Sep 20, 5:28 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	47 min
Sep 20, 6:11 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	64 min
Sep 20, 6:22 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	38 min
Sep 20, 6:33 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Sioux	42 min
Sep 20, 6:49 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Steele, Traill	41 min
Sep 20, 7:03 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	57 min
Sep 20, 7:33 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	57 min
Sep 20, 7:57 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	63 min
Sep 20, 8:05 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Walsh	55 min
Sep 20, 8:22 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	38 min
Sep 20, 8:28 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	47 min
Sep 20, 8:55 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	65 min
Sep 21, 3:55 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	37 min
Sep 21, 5:19 PM CDT	Severe Thunderstorm Warning	FGF	Cass	41 min
Sep 30, 12:47 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	24 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 2018 2020

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.