This alert expired on 3 June 2026 at 22:45 UTC. It is kept here as a record.
It is the 29th strongest of the 169 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 1 June 2026. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 3 at 3:55PM MDT until June 3 at 4:45PM MDT by NWS Denver CO
An estimated 2,472,021 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 22, 2026 · score 52 · 9.4 km
- August 22, 2026 · score 52 · 13.9 km
- June 26, 2026 · score 52 · 14.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 81 % 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) | 46 / 100 |
| Our confidence | 81% |
| Coordinates | 39.7251, -104.6983 |
| Nearest City | Aurora (11 km) |
| Population Exposed | 2.5M within 50 km |
| Impact Tier | significant |
| Date | 2026-06-03 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cc6fd4213cd4477bc93996e19cda157f |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Douglas, CO; Weld, CO; Western Arapahoe, CO; Douglas, CO; Elbert, CO |
| Headline | Severe Thunderstorm Warning issued June 3 at 3:55PM MDT until June 3 at 4:45PM MDT by NWS Denver CO |
| Expires | 2026-06-03T16:45:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cc6fd4213cd4477bc93996e19cda157f5d1d53f8.001.1","noaa_urn:oid:2.49.0.1.840.0.d61a871b6d2e214345d70931b0cb6d65d6528f5a.001.1","noaa_urn:oid:2.49.0.1.840.0.c8471500b32b88ce207e2f01d3546fcbae302603.001.1"] |
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 Aurora?
Calamity.live data shows a weather event with CalamityScore 46/100, near Aurora (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.