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 28 June 2026 at 04:30 UTC. It is kept here as a record.
No stronger detection stands among the 160 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. The last comparable one was on 14 May 2026.
What the source measured
NOAA reported: Tornado Warning issued June 27 at 11:06PM CDT until June 27 at 11:30PM 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 · 11.3 km
- June 29, 2026 · score 63 · 16.7 km
- June 29, 2026 · score 63 · 17.6 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 | 0.90/1 |
| Coordinates | 46.8220, -100.6416 |
| Nearest City | Bismarck (11 km) |
| Urban exposure index (PEI) | 96.5K within 50 km |
| Impact Tier | severe |
| Date | 2026-06-28 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.db4873583f67fe7e6261cae2649b18ae |
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: 2026-06-28 — time not reported.
First archived: 2026-06-28T04:07:08.175Z. 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; Emmons, ND; Burleigh, ND |
| Headline | Tornado Warning issued June 27 at 11:06PM 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 |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.db4873583f67fe7e6261cae2649b18aea642ce1f.001.1","noaa_urn:oid:2.49.0.1.840.0.f745aa430ded324080adc0e364974f80d4c89b8b.002.1"] |
| 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 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.
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