Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 29 June 2026 at 21:00 UTC. It is kept here as a record.
No stronger detection stands among the 180 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. 31 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 29 at 3:41PM CDT until June 29 at 4:00PM CDT by NWS Bismarck ND
Urban PEI: 96,474 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 30, 2026 · score 45 · 5.9 km
- June 29, 2026 · score 63 · 6.7 km
- June 30, 2026 · score 45 · 8.5 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 63 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 63 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 46.8067, -100.7833 |
| Nearest City | Bismarck (0 km) |
| Urban exposure index (PEI) | 96.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-29T20:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3324af17f538e879d82bae5fb1ccb66cbf5848a8.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-29T20:41:00.000Z.
First archived: 2026-06-29T20:49:38.579Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Burleigh, ND; Morton, ND |
| Headline | Tornado Warning issued June 29 at 3:41PM CDT until June 29 at 4:00PM CDT by NWS Bismarck ND |
| Expires | 2026-06-29T16:00:00-05:00 |
| 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 8 March 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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Bismarck?