Right now
The most recent data we hold from NOAA arrived 9 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 6 km from here.
This alert expired on 8 June 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 8 April 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 7 at 6:30PM MDT until June 7 at 7:00PM MDT by NWS Rapid City SD
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.60/1 |
| Coordinates | 47.1761, -103.7308 |
| Nearest City | Dickinson (79 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-08T00:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7fe9fa03e4f12c28b1f3f2f3d76021ed |
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: 2026-06-08T00:30:00.000Z.
First archived: 2026-06-08T00:36:39.217Z. 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 | Harding, SD; Perkins, SD; Billings, ND; Bowman, ND; Golden Valley, ND; Slope, ND; Billings, ND; Golden Valley, ND; McKenzie, ND and 8 more areas |
| Headline | Severe Thunderstorm Warning issued June 7 at 6:30PM MDT until June 7 at 7:00PM MDT by NWS Rapid City SD |
| Expires | 2026-06-07T19:00:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7fe9fa03e4f12c28b1f3f2f3d76021ed2e171791.002.1","noaa_urn:oid:2.49.0.1.840.0.d4b1e9db8464d722ca4f550bef579c21cdcced1f.001.1","noaa_urn:oid:2.49.0.1.840.0.b2149ee918cc6a5f7aa54d59fdf1ca02058f85a9.001.1","noaa_urn:oid:2.49.0.1.840.0.4e83d120587315e45c62c627d2e5e64f8c154c92.001.1","noaa_urn:oid:2.49.0.1.840.0.bb8f83b456c491a699dac8248811222f06f8c474.001.1","noaa_urn:oid:2.49.0.1.840.0.887afc0910d7ce6b3fd639a8075f64bba38856f0.001.1","noaa_urn:oid:2.49.0.1.840.0.cda566072dc30fce08016b93f0a164c0e5846ce1.001.1","noaa_urn:oid:2.49.0.1.840.0.4e74505cdae479fa4dd8e3dfcdbf93096e165ba5.001.1","noaa_urn:oid:2.49.0.1.840.0.1bfbc1722c1f39e020a3d7b39832e9e01859ad52.001.1","noaa_urn:oid:2.49.0.1.840.0.cf0c1139ceb5efd13320180d4aa1065177f18130.001.1","noaa_urn:oid:2.49.0.1.840.0.68ade7ad91c9566214e98160e47c095bd8030ec4.001.1"] |
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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