This alert expired on 13 August 2026 at 00:15 UTC. It is kept here as a record.
It is the 5th strongest of the 60 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 5:53PM MDT until August 12 at 6:15PM MDT by NWS Denver CO
Nearby, since 6 May 2026
- June 25, 2026 · score 46 · 20.1 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 67 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 67% |
| Coordinates | 40.5478, -103.2090 |
| Nearest City | Evans (127 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-12T23:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4b5ca641bd587b66ef1209a8109d64b4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Logan, CO; Washington, CO; Logan, CO |
| Headline | Severe Thunderstorm Warning issued August 12 at 5:53PM MDT until August 12 at 6:15PM MDT by NWS Denver CO |
| Expires | 2026-08-12T18:15:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4b5ca641bd587b66ef1209a8109d64b4c859adaa.002.1","noaa_urn:oid:2.49.0.1.840.0.a9005c8527f4b8d99b591deda39a4397f1a294d9.001.1"] |
| Iem TypeSummary | W |
| Iem City | 13 SSE Bushnell |
| Iem County | Kimball |
| Iem State | NE |
| Iem Wfo | CYS |
| Iem Remark | Photo received of landspout circulation west of Highway 71. Time matched from radar. |
| MergedSources | [{"id":"iem_H_41.010_-103.690_1786575960000","source":"iem","severity":"low","severityValue":25,"timestamp":1786575960000,"latitude":41.01,"longitude":-103.69},{"id":"iem_H_41.060_-103.750_1786575120000","source":"iem","severity":"low","severityValue":25,"timestamp":1786575120000,"latitude":41.06,"longitude":-103.75},{"id":"iem_W_41.060_-103.780_1786574880000","source":"iem","severity":"low","severityValue":25,"timestamp":1786574880000,"latitude":41.06,"longitude":-103.78}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.