Right now
The most recent data we hold from NOAA arrived 21 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 21:45 UTC. It is kept here as a record.
It is the 5th strongest of the 49 detections recorded within 20 km of this point since 8 June 2026. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 29 at 4:01PM CDT until June 29 at 4:45PM CDT by NWS Bismarck ND
Nearby, since 8 June 2026
- September 7, 2026 · score 46 · 6.9 km
- July 30, 2026 · score 22 · 16.4 km
- August 10, 2026 · score 34 · 23.3 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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 | High |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.64/1 |
| Coordinates | 47.7174, -100.9195 |
| Nearest City | Minot (64 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-29T21:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2e5bafe17fc8635c8ee30930ba6a6c2a |
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: 2026-06-29T21:01:00.000Z.
First archived: 2026-06-29T21:06:01.987Z. 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 | Burleigh, ND; McHenry, ND; McLean, ND; Mercer, ND |
| Headline | Severe Thunderstorm Warning issued June 29 at 4:01PM CDT until June 29 at 4:45PM CDT by NWS Bismarck ND |
| Expires | 2026-06-29T16:45:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2e5bafe17fc8635c8ee30930ba6a6c2ac2bf224e.001.1","noaa_urn:oid:2.49.0.1.840.0.b3c56dbc9ed159b23100663b640717f2c4af8d21.001.1","noaa_urn:oid:2.49.0.1.840.0.78ad550390b35efc9a2a06db1032c58252970188.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 3 NNE Simcoe |
| Spc County | McHenry |
| Spc State | ND |
| Spc Comments | Also reported 60 mph wind gusts. (BIS) |
| MergedSources | [{"id":"spc_hail_48.20_-100.84_47","source":"spc","severity":"high","severityValue":65,"timestamp":1782765480000,"latitude":48.2,"longitude":-100.84}] |
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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