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.
This alert expired on 28 June 2026 at 03:45 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 9:43PM CDT until June 27 at 10:45PM CDT by NWS Bismarck ND
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 47.8139, -103.0898 |
| Nearest City | Williston (54 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-28T02:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9a973fc2139741c35c8f3ceb66ed1821 |
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: 2026-06-28T02:43:00.000Z.
First archived: 2026-06-28T02:47:19.937Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, ND; Grant, ND; Hettinger, ND; Morton, ND; Sioux, ND; Dunn, ND; McKenzie, ND; McLean, ND; Mercer, ND; Morton, ND; Mountrail, ND; Oliver, ND; Stark, ND; Williams, ND; McLean, ND; Mercer, ND; Morton, ND; Mountrail, ND; Oliver, ND; Ward, ND and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 27 at 9:43PM CDT until June 27 at 10:45PM CDT by NWS Bismarck ND |
| Expires | 2026-06-27T22:45:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9a973fc2139741c35c8f3ceb66ed18215ad2cbef.001.1","noaa_urn:oid:2.49.0.1.840.0.c811d53ee24c62abb0cfd04f030bd5294fb08e65.001.1","noaa_urn:oid:2.49.0.1.840.0.15f10ab6bfc7e32ff48532c08a7811798b29a110.001.1","noaa_urn:oid:2.49.0.1.840.0.727fa26dce8da79beed38d8db1a71b3b35305871.001.1","noaa_urn:oid:2.49.0.1.840.0.096bbf7e07fd7aa2aeb10c952922b7f66b888ecd.001.1","noaa_urn:oid:2.49.0.1.840.0.7cab7a40c4299e6e2fe9962ab5328a7fb8d59496.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 80 |
| Iem Unit | MPH |
| Iem City | 4 SW Manning |
| Iem County | Dunn |
| Iem State | ND |
| Iem Wfo | BIS |
| Iem Remark | 80 MPH gust at 10M recorded at Manning 4SW NDAWN. |
| MergedSources | [{"id":"iem_G_47.970_-103.930_1782611100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782611100000,"latitude":47.97,"longitude":-103.93},{"id":"iem_G_47.190_-102.830_1782610200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782610200000,"latitude":47.19,"longitude":-102.83}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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.
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