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.
- Morton County36
- Grant County30
- McKenzie County28
- Cass County27
- Williams County24
- Burleigh County24
- Emmons County23
- Adams County22
- Sioux County22
- Dunn County21
- Mountrail County20
- McLean County20
- Ward County19
- Hettinger County18
- Kidder County18
- Burke County18
- Billings County18
- Stark County16
- Oliver County16
- Mercer County16
- Richland County15
- McHenry County15
- Stutsman County14
- Divide County13
- Bowman County13
- Golden Valley County13
- Sargent County13
- Slope County12
- Ramsey County12
- Logan County12
- Barnes County11
- Bottineau County11
- Sheridan County11
- Towner County10
- Traill County10
- McIntosh County10
- Benson County9
- Ransom County9
- Dickey County8
- Grand Forks County8
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20122014
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.