This alert expired on 13 August 2026 at 23:00 UTC. It is kept here as a record.
It is the 6th strongest of the 99 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 13 at 4:27PM MDT until August 13 at 5:00PM MDT by NWS Denver CO
An estimated 2,317,081 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 1, 2026 · score 52 · 5.2 km
- August 22, 2026 · score 52 · 9.1 km
- June 3, 2026 · score 46 · 15.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 79 % 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) | 52 / 100 |
| Our confidence | 79% |
| Coordinates | 39.6171, -104.5857 |
| Nearest City | Parker (18 km) |
| Population Exposed | 2.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T22:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a1e68ca6ab545470be781b994dfa7840c95d9838.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Western Arapahoe, CO; Central Arapahoe, CO |
| Headline | Severe Thunderstorm Warning issued August 13 at 4:27PM MDT until August 13 at 5:00PM MDT by NWS Denver CO |
| Expires | 2026-08-13T17:00:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
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 near Parker?
Calamity.live data shows a weather event with CalamityScore 52/100, near Parker (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.