This alert expired on 28 June 2026 at 04:30 UTC. It is kept here as a record.
It is the strongest of the 23 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 10 June 2026.
What the source measured
NOAA reported: Tornado Warning issued June 27 at 11:17PM CDT until June 27 at 11:30PM CDT by NWS Bismarck ND
An estimated 96,474 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 19, 2026 · score 39 · 7.1 km
- August 12, 2026 · score 39 · 10.1 km
- July 20, 2026 · score 39 · 14.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 63 out of 100, at 90 % 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 | 90% |
| Coordinates | 46.6550, -100.3762 |
| Nearest City | Bismarck (35 km) |
| Population Exposed | 96.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-28T04:17:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Burleigh, ND; Emmons, ND |
| Headline | Tornado Warning issued June 27 at 11:17PM CDT until June 27 at 11:30PM CDT by NWS Bismarck ND |
| Expires | 2026-06-27T23:30:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 61 |
| Iem Unit | MPH |
| Iem City | 5 SW Judson |
| Iem County | Morton |
| Iem State | ND |
| Iem Wfo | BIS |
| Iem Remark | 61 MPH wind gust at 10M recorded at New Salem 6SE NDAWN. |
| MergedSources | [{"id":"iem_G_46.460_-101.220_1782617040000","source":"iem","severity":"low","severityValue":25,"timestamp":1782617040000,"latitude":46.46,"longitude":-101.22},{"id":"iem_G_46.770_-101.340_1782616920000","source":"iem","severity":"low","severityValue":25,"timestamp":1782616920000,"latitude":46.77,"longitude":-101.34}] |
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.