Right now
The most recent data we hold from NOAA arrived 30 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 23 June 2026 at 04:45 UTC. It is kept here as a record.
It is the 69th strongest of the 160 detections recorded within 20 km of this point since 22 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 10:06PM MDT until June 22 at 10:45PM MDT by NWS North Platte NE
Nearby, since 22 March 2026
- August 12, 2026 · score 22 · 18.8 km
How we know
2 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 | 0.65/1 |
| Coordinates | 43.0674, -102.8854 |
| Nearest City | Rapid City (116 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-23T04:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.378d4b602aead6f1dad6473d98c65742 |
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: 2026-06-23T04:06:00.000Z.
First archived: 2026-06-23T04:14:25.465Z. 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 | Cherry, NE; Sheridan, NE; Niobrara, WY; Bennett, SD; Oglala Lakota, SD |
| Headline | Severe Thunderstorm Warning issued June 22 at 10:06PM MDT until June 22 at 10:45PM MDT by NWS North Platte NE |
| Expires | 2026-06-22T22:45:00-06:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.378d4b602aead6f1dad6473d98c657425f3c0c04.001.1","noaa_urn:oid:2.49.0.1.840.0.c71ab8e2604dcdf0b911ad8d9729aec32f3fef59.001.1","noaa_urn:oid:2.49.0.1.840.0.fd9253b572093f6463f5ee48cee97f770bb8d552.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | inch |
| Iem City | Wind Cave Visitors Cent |
| Iem County | Custer |
| Iem State | SD |
| Iem Wfo | UNR |
| Iem Remark | mPING report |
| MergedSources | [{"id":"iem_H_43.550_-103.470_1782184500000","source":"iem","severity":"low","severityValue":25,"timestamp":1782184500000,"latitude":43.55,"longitude":-103.47}] |
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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