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 23 June 2026 at 00:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 98 detections recorded within 20 km of this point since 5 May 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 5:23PM MDT until June 22 at 6:30PM MDT by NWS Cheyenne WY
How we know
4 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 | 0.68/1 |
| Coordinates | 41.7835, -103.7633 |
| Nearest City | Cheyenne (113 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-22T23:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.014c536e27ba5c9ce31ccdae21a65924 |
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: 2026-06-22T23:23:00.000Z.
First archived: 2026-06-22T23:43:19.308Z. 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 | Sioux, NE; Niobrara, WY; Banner, NE; Scotts Bluff, NE; Sioux, NE; Logan, CO; Washington, CO and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 5:23PM MDT until June 22 at 6:30PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-22T18:30:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.014c536e27ba5c9ce31ccdae21a65924511f1043.001.1","noaa_urn:oid:2.49.0.1.840.0.2944259a1309b43b248f383c110a93a4c69c0ceb.001.1","noaa_urn:oid:2.49.0.1.840.0.3af613e496036e6152d80fd6dc5007dfba8be81c.001.1","noaa_urn:oid:2.49.0.1.840.0.9e6e55fab8b92c36b9cdb1a7624b6dbd68e69530.001.1"] |
| 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_C_41.980_-103.810_1782171000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782171000000,"latitude":41.98,"longitude":-103.81},{"id":"iem_H_42.230_-104.050_1782169260000","source":"iem","severity":"low","severityValue":25,"timestamp":1782169260000,"latitude":42.23,"longitude":-104.05},{"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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