Right now
The most recent data we hold from NOAA arrived 14 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 22 June 2026 at 21:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 12 detections recorded within 20 km of this point since 5 May 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 2:31PM MDT until June 22 at 3:00PM MDT by NWS Cheyenne WY
Nearby, since 5 May 2026
- June 2, 2026 · score 46 · 21.0 km
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 | 0.57/1 |
| Coordinates | 42.9395, -104.8683 |
| Nearest City | Casper (118 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-22T20:31:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d8dedc22547dc38ae2c4f8fd77658645 |
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: 2026-06-22T20:31:00.000Z.
First archived: 2026-06-22T20:34:21.369Z. 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 | Niobrara, WY; Banner, NE; Kimball, NE; Laramie, WY; Converse, WY; Niobrara, WY and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 2:31PM MDT until June 22 at 3:00PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-22T15:00:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d8dedc22547dc38ae2c4f8fd7765864508f5e511.001.1","noaa_urn:oid:2.49.0.1.840.0.660d2ef013b30e1b8ea178da6f76fa9d95c8e741.001.1","noaa_urn:oid:2.49.0.1.840.0.7b9fee7b57b071b253157c8e8cab76b536a57cf7.001.1","noaa_urn:oid:2.49.0.1.840.0.d05023b0f2c420d07bbff2aa24129051bbb15fda.001.1","noaa_urn:oid:2.49.0.1.840.0.dc54a734cdc7b24c2ce3268cdba3bf2bc4b8076d.001.1","noaa_urn:oid:2.49.0.1.840.0.0b1c292c5ff4a928c76b137ca24126681b0dd9ba.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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