Right now
The most recent data we hold from NOAA arrived 1 minute 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 23:45 UTC. It is kept here as a record.
No stronger detection stands among the 44 recorded within 20 km of this point since 5 May 2026 — 13 others scored the same. The last comparable one was on 21 June 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 4:39PM MDT until June 22 at 5:45PM MDT by NWS Rapid City SD
Nearby, since 5 May 2026
- August 9, 2026 · score 22 · 15.9 km
- July 20, 2026 · score 16 · 17.1 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 | 0.62/1 |
| Coordinates | 42.0582, -103.8413 |
| Nearest City | Cheyenne (131 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-22T22:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d0b80bd171fec390940fc53cdb177e7f |
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: 2026-06-22T22:39:00.000Z.
First archived: 2026-06-22T22:44:42.558Z. 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 | Lawrence, SD; Meade, SD; Pennington, SD; Converse, WY; Niobrara, WY; Sioux, NE; Goshen, WY and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 4:39PM MDT until June 22 at 5:45PM MDT by NWS Rapid City SD |
| Expires | 2026-06-22T17:45:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d0b80bd171fec390940fc53cdb177e7f889e646f.001.1","noaa_urn:oid:2.49.0.1.840.0.8129cde54f29fd27d285ef7ee79122345bc3e124.001.1","noaa_urn:oid:2.49.0.1.840.0.04d35ff575c439b0216ab76e8bae5ad9d51ddd1c.001.1","noaa_urn:oid:2.49.0.1.840.0.bc88a49d4797d9d1c95a4b9f54ac06c63246b8d9.001.1","noaa_urn:oid:2.49.0.1.840.0.5409898b01349bb2da51c256822716fc4624bce1.001.1","noaa_urn:oid:2.49.0.1.840.0.e0f9a9568ef2714fadd71c23e7baa50512133847.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 6 NNW Albin |
| Iem County | Laramie |
| Iem State | WY |
| Iem Wfo | CYS |
| MergedSources | [{"id":"iem_H_41.500_-104.130_1782157140000","source":"iem","severity":"low","severityValue":25,"timestamp":1782157140000,"latitude":41.5,"longitude":-104.13}] |
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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