This alert expired on 29 June 2026 at 21:08 UTC. It is kept here as a record.
No stronger detection stands among the 159 recorded within 20 km of this point since 15 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 25 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 29 at 3:58PM CDT until June 29 at 4:00PM CDT by NWS Bismarck ND
An estimated 96,474 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 28, 2026 · score 63 · 8.3 km
- June 30, 2026 · score 45 · 11.4 km
- June 30, 2026 · score 45 · 18.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 63 out of 100, at 89 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 63 / 100 |
| Our confidence | 89% |
| Coordinates | 46.9580, -100.7360 |
| Nearest City | Bismarck (17 km) |
| Population Exposed | 96.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-29T20:58:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Burleigh, ND |
| Headline | Tornado Warning issued June 29 at 3:58PM CDT until June 29 at 4:00PM CDT by NWS Bismarck ND |
| Expires | 2026-06-29T16:08:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | 63 |
| Spc Location | 4 SSW Mandan |
| Spc County | Morton |
| Spc State | ND |
| Spc Comments | 63 MPH wind gust at 10M measured from Mandan 4S NDAWN. (BIS) |
| Iem TypeSummary | G |
| Iem Magnitude | 63 |
| Iem Unit | MPH |
| Iem City | 4 SSW Mandan |
| Iem County | Morton |
| Iem State | ND |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 63/100, near Bismarck (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.