Alert archive / North Dakota / Tornado Warnings
Tornado Warnings in North Dakota, 2022
26 tornado warnings in 2022. 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Tornado Warnings
- 26
- Busiest month
- June12 tornado warnings
- Busiest day
- June 24, 20228 tornado warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
9 of 26 tornado warnings covering North Dakota in 2022 had a tornado report inside them; 23 of 32 tornado reports fell inside a warning, on average 17 minutes after it went out.
North Dakota, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 26 | 9 | 65% | 32 | 72% | 17 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Bismarck, ND: tornado warnings | 9 | 3 | 67% | 9 | 56% | 10 min |
| NWS Grand Forks, ND: tornado warnings | 34 | 18 | 47% | 59 | 75% | 12 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 |
|---|---|---|---|---|
| Apr 23, 1:50 PM CDT | Tornado Warning | FGF | Richland | 40 min |
| Apr 23, 2:28 PM CDT | Tornado Warning | FGF | Cass, Ransom, Richland | 47 min |
| Apr 23, 3:26 PM CDT | Tornado Warning | BIS | LaMoure, Stutsman | 34 min |
| Apr 23, 3:30 PM CDT | Tornado Warning | FGF | Barnes | 11 min |
| May 12, 7:07 PM CDT | Tornado Warning | FGF | Richland | 23 min |
| May 17, 7:47 PM CDT | Tornado Warning | BIS | Bottineau | 28 min |
| May 29, 10:01 PM CDT | Tornado Warning | FGF | Grand Forks | 44 min |
| Jun 13, 9:53 PM CDT | Tornado Warning | BIS | Pierce, Sheridan, Wells | 37 min |
| Jun 13, 10:37 PM CDT | Tornado Warning | FGF | Benson | 23 min |
| Jun 13, 10:52 PM CDT | Tornado Warning | FGF | Benson, Eddy, Ramsey | 38 min |
| Jun 13, 11:27 PM CDT | Tornado Warning | FGF | Benson, Eddy, Ramsey | 37 min |
| Jun 24, 2:38 PM CDT | Tornado Warning | FGF | Cavalier, Walsh | 20 min |
| Jun 24, 3:09 PM CDT | Tornado Warning | FGF | Cavalier, Pembina, Walsh | 32 min |
| Jun 24, 3:18 PM CDT | Tornado Warning | FGF | Benson, Eddy | 42 min |
| Jun 24, 3:56 PM CDT | Tornado Warning | BIS | Wells | 34 min |
| Jun 24, 3:58 PM CDT | Tornado Warning | FGF | Benson, Eddy | 30 min |
| Jun 24, 4:42 PM CDT | Tornado Warning | FGF | Benson, Eddy, Nelson | 48 min |
| Jun 24, 5:18 PM CDT | Tornado Warning | FGF | Grand Forks, Nelson | 42 min |
| Jun 24, 5:40 PM CDT | Tornado Warning | FGF | Grand Forks | 40 min |
| Jul 18, 10:41 PM CDT | Tornado Warning | BIS | Burke, Divide | 34 min |
| Jul 18, 11:06 PM CDT | Tornado Warning | BIS | Burke | 24 min |
| Jul 22, 9:12 PM CDT | Tornado Warning | BIS | McHenry, Renville, Ward | 33 min |
| Jul 23, 12:23 AM CDT | Tornado Warning | FGF | Grand Forks, Traill | 37 min |
| Aug 15, 5:23 PM CDT | Tornado Warning | BIS | McLean | 37 min |
| Aug 15, 5:44 PM CDT | Tornado Warning | BIS | McLean | 31 min |
| Aug 16, 5:55 PM CDT | Tornado Warning | FGF | Griggs | 22 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Benson County6
- Eddy County5
- Grand Forks County4
- Richland County3
- Wells County2
- Ramsey County2
- Cavalier County2
- Walsh County2
- Nelson County2
- Burke County2
- McLean County2
- Cass County1
- Ransom County1
- LaMoure County1
- Stutsman County1
- Barnes County1
- Bottineau County1
- Pierce County1
- Sheridan County1
- Pembina County1
- Divide County1
- McHenry County1
- Renville County1
- Ward County1
- Traill County1
- Griggs County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.