Right now
The most recent data we hold from NOAA arrived 51 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 6 September 2026 at 04:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 92 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 5 at 10:11PM MDT until September 5 at 10:45PM MDT by NWS Denver CO
Nearby, since 6 May 2026
- July 9, 2026 · score 22 · 13.5 km
- July 8, 2026 · score 22 · 14.3 km
- September 5, 2026 · score 28 · 15.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 71% |
| Coordinates | 40.7540, -103.2640 |
| Nearest City | Evans (127 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-06T04:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ac40011faa2e82c3347d881720bf9681b64f2e97.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Logan, CO |
| Headline | Severe Thunderstorm Warning issued September 5 at 10:11PM MDT until September 5 at 10:45PM MDT by NWS Denver CO |
| Expires | 2026-09-05T22:45:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | 1 SE Sterling |
| Spc County | Logan |
| Spc State | CO |
| Spc Comments | Report from mPING: Golf Ball (1.75 in.). (BOU) |
| Iem TypeSummary | G |
| Iem Magnitude | 65 |
| Iem Unit | MPH |
| Iem City | 4.3 WNW Lorenzo |
| Iem County | Cheyenne |
| Iem State | NE |
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 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.