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.
- Morton County32
- Cass County32
- Traill County30
- Mountrail County26
- Grant County23
- Ward County23
- Steele County21
- Emmons County20
- Grand Forks County20
- Hettinger County20
- McKenzie County20
- Burleigh County19
- Cavalier County19
- McLean County19
- Sioux County19
- Ramsey County18
- Stutsman County17
- Walsh County17
- Williams County17
- Richland County16
- Stark County16
- Slope County15
- Dunn County15
- Mercer County15
- Griggs County14
- Bottineau County14
- Oliver County14
- Kidder County12
- Pembina County12
- Adams County12
- Benson County12
- Eddy County11
- Nelson County11
- Barnes County11
- Billings County11
- Divide County11
- Renville County11
- Wells County11
- Sheridan County11
- Sargent County10
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20182020
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.