Right now
The most recent data we hold from NOAA arrived 56 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 25 June 2026 at 00:15 UTC. It is kept here as a record.
It is the 10th strongest of the 52 detections recorded within 20 km of this point since 30 May 2026. The last comparable one was on 23 June 2026. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 6:00PM MDT until June 24 at 6:15PM MDT by NWS Cheyenne WY
Nearby, since 30 May 2026
- August 13, 2026 · score 22 · 7.2 km
- July 23, 2026 · score 22 · 20.7 km
- July 23, 2026 · score 22 · 20.9 km
How we know
3 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 | 40.6180, -102.7872 |
| Nearest City | Evans (163 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-25T00:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.565b841452c2112a088e3f8ade89587d |
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: 2026-06-25T00:00:00.000Z.
First archived: 2026-06-25T00:03:05.714Z. 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 | Cheyenne, NE; Washington, CO; Keith, NE and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 24 at 6:00PM MDT until June 24 at 6:15PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-24T18:15:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.565b841452c2112a088e3f8ade89587d53a3f587.001.1","noaa_urn:oid:2.49.0.1.840.0.7ece2eafb5e59dd93fa2b133a2b65b30a72d60dd.001.1","noaa_urn:oid:2.49.0.1.840.0.bf89dd9b465ae4c899d31df26f8a41ec6aa04c1b.001.1","noaa_urn:oid:2.49.0.1.840.0.e02e7ca35dda03889f789a029b5633f82ef5f341.001.1","noaa_urn:oid:2.49.0.1.840.0.d897dc901f3d97827fbc1b9c01441d8f4dea0889.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 61 |
| Iem Unit | MPH |
| Iem City | 3 N Messex |
| Iem County | Logan |
| Iem State | CO |
| Iem Wfo | BOU |
| MergedSources | [{"id":"iem_G_40.170_-103.220_1782343740000","source":"iem","severity":"low","severityValue":25,"timestamp":1782343740000,"latitude":40.17,"longitude":-103.22},{"id":"iem_G_40.460_-103.430_1782339960000","source":"iem","severity":"low","severityValue":25,"timestamp":1782339960000,"latitude":40.46,"longitude":-103.43}] |
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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