Right now
The most recent data we hold from NOAA arrived 16 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 02:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 37 detections recorded within 20 km of this point since 15 March 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 22 at 7:43PM MDT until June 22 at 8:00PM MDT by NWS Rapid City SD
Nearby, since 15 March 2026
- June 23, 2026 · score 34 · 16.3 km
- July 7, 2026 · score 16 · 18.5 km
How we know
9 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 | 44.0571, -104.8143 |
| Nearest City | Gillette (61 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-23T01:43:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4bca285e52d614428001050195e7d961ae3c083b.002.1 |
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: 2026-06-23T01:43:00.000Z.
First archived: 2026-06-23T01:48:15.089Z. 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 | Weston, WY |
| Headline | Severe Thunderstorm Warning issued June 22 at 7:43PM MDT until June 22 at 8:00PM MDT by NWS Rapid City SD |
| Expires | 2026-06-22T20:00:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | mph |
| Iem City | 3 NNE Dwtn Gillette |
| Iem County | Campbell |
| Iem State | WY |
| Iem Wfo | UNR |
| Iem Remark | Measured on a personal weather station. |
| MergedSources | [{"id":"iem_H_43.540_-105.270_1782165900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782165900000,"latitude":43.54,"longitude":-105.27},{"id":"iem_H_44.370_-105.520_1782176460000","source":"iem","severity":"low","severityValue":25,"timestamp":1782176460000,"latitude":44.37,"longitude":-105.52},{"id":"iem_H_43.730_-105.570_1782163380000","source":"iem","severity":"low","severityValue":25,"timestamp":1782163380000,"latitude":43.73,"longitude":-105.57},{"id":"iem_H_43.750_-105.490_1782163500000","source":"iem","severity":"low","severityValue":25,"timestamp":1782163500000,"latitude":43.75,"longitude":-105.49},{"id":"iem_G_44.350_-105.540_1782176280000","source":"iem","severity":"low","severityValue":25,"timestamp":1782176280000,"latitude":44.35,"longitude":-105.54},{"id":"iem_G_44.370_-105.520_1782176460000","source":"iem","severity":"low","severityValue":25,"timestamp":1782176460000,"latitude":44.37,"longitude":-105.52},{"id":"iem_G_43.530_-105.380_1782166140000","source":"iem","severity":"low","severityValue":25,"timestamp":1782166140000,"latitude":43.53,"longitude":-105.38},{"id":"iem_G_44.330_-105.480_1782176460000","source":"iem","severity":"low","severityValue":25,"timestamp":1782176460000,"latitude":44.33,"longitude":-105.48}] |
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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