Right now
The most recent data we hold from NOAA arrived 20 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 02:33 UTC. It is kept here as a record.
No stronger detection stands among the 31 recorded within 20 km of this point since 15 March 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 8:24PM MDT until June 27 at 8:30PM MDT by NWS Glasgow MT
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 | 45.2978, -102.5419 |
| Nearest City | Rapid City (146 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-28T02:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.92bd85a399e2662b0777247f129c14e4 |
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: 2026-06-28T02:24:00.000Z.
First archived: 2026-06-28T02:25:45.534Z. 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 | Dawson, MT; Richland, MT; Roosevelt, MT; Sheridan, MT; Wibaux, MT; Daniels, MT; Roosevelt, MT; Sheridan, MT; Divide, ND; McKenzie, ND; Williams, ND and 11 more areas |
| Headline | Severe Thunderstorm Warning issued June 27 at 8:24PM MDT until June 27 at 8:30PM MDT by NWS Glasgow MT |
| Expires | 2026-06-27T20:33:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.92bd85a399e2662b0777247f129c14e42214b7d2.001.1","noaa_urn:oid:2.49.0.1.840.0.7cab7a40c4299e6e2fe9962ab5328a7fb8d59496.001.1","noaa_urn:oid:2.49.0.1.840.0.2cb03b5591efb2a695da5de736dd9c2d01b29f91.001.1","noaa_urn:oid:2.49.0.1.840.0.0bfcd870c16aaf85fa810dbfe0c5c2357eabc3cb.002.1","noaa_urn:oid:2.49.0.1.840.0.020f83425c0b3d9a30496330ce7badaa3031e6bb.001.1","noaa_urn:oid:2.49.0.1.840.0.727fa26dce8da79beed38d8db1a71b3b35305871.001.1","noaa_urn:oid:2.49.0.1.840.0.7c39575bc79d6ccaff8f8280b88bfac42f0a0449.001.1","noaa_urn:oid:2.49.0.1.840.0.78b2c5e9cd15a0336ac107345cd3a3a9e1813be4.001.1","noaa_urn:oid:2.49.0.1.840.0.2b648d6f296656fdb9e279c4ceb0eac8bfbc2dbd.001.1","noaa_urn:oid:2.49.0.1.840.0.5a1503a897eb678956b92ae4cd2dcc56f55895a1.001.1","noaa_urn:oid:2.49.0.1.840.0.3692e5c260c226e46c261a954271b310acbe9aae.001.1","noaa_urn:oid:2.49.0.1.840.0.214c9c5c989c2a76e79aa73425ee8362b8d67fd9.001.1","noaa_urn:oid:2.49.0.1.840.0.72e81d4c9d22f14bf7d7bb4e821271144a91120e.001.1","noaa_urn:oid:2.49.0.1.840.0.29962a309af75ea1b23daecf16ab2fd7bec42b38.001.1","noaa_urn:oid:2.49.0.1.840.0.f7ea64a2ec0db58d0ba6deb3ef4f1b4ad29cb543.001.1","noaa_urn:oid:2.49.0.1.840.0.afb5d43466c0c12246ac5fa74a0ab1bc194e334a.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | inch |
| Iem City | 10 ESE Buffalo |
| Iem County | Harding |
| Iem State | SD |
| Iem Wfo | UNR |
| Iem Remark | Along Highway 20. Reported via Spotter Network. |
| MergedSources | [{"id":"iem_G_45.340_-102.920_1782609300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782609300000,"latitude":45.34,"longitude":-102.92},{"id":"iem_H_45.550_-103.350_1782606480000","source":"iem","severity":"low","severityValue":25,"timestamp":1782606480000,"latitude":45.55,"longitude":-103.35}] |
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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