Right now
The most recent data we hold from NOAA arrived 7 hours 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 10 June 2026 at 00:07 UTC. It is kept here as a record.
It is the 19th strongest of the 38 detections recorded within 20 km of this point since 9 June 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 9 at 5:57PM MDT until June 9 at 6:00PM MDT by NWS North Platte NE
Nearby, since 9 June 2026
- July 9, 2026 · score 22 · 2.0 km
- August 13, 2026 · score 22 · 4.8 km
- July 6, 2026 · score 22 · 14.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 42.5834, -102.2775 |
| Nearest City | Rapid City (183 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-09T23:57:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2f292e46a3041823ade088dfdd299f4e |
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: 2026-06-09T23:57:00.000Z.
First archived: 2026-06-10T00:00:10.169Z. 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 | Sheridan, NE; Bennett, SD; Jackson, SD; Oglala Lakota, SD; Arthur, NE; Garden, NE; Grant, NE; Hooker, NE; Keith, NE; McPherson, NE; Sheridan, NE |
| Headline | Severe Thunderstorm Warning issued June 9 at 5:57PM MDT until June 9 at 6:00PM MDT by NWS North Platte NE |
| Expires | 2026-06-09T18:07:00-06:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2f292e46a3041823ade088dfdd299f4e12d50585.001.1","noaa_urn:oid:2.49.0.1.840.0.873e95e978190fb4a607c11af05827a8aadc9336.001.1","noaa_urn:oid:2.49.0.1.840.0.865f519441105ea97fd63595961d2a2217ac52db.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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