This alert expired on 1 June 2026 at 21:16 UTC. It is kept here as a record.
No stronger detection stands among the 58 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 1 at 3:06PM MDT until June 1 at 3:15PM MDT by NWS Denver CO
An estimated 1,905,615 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 30, 2026 · score 52 · 4.5 km
- July 29, 2026 · score 52 · 4.5 km
- August 13, 2026 · score 52 · 15.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 76 out of 100, at 80 % 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 | Critical |
| Calamity Score (ours) | 76 / 100 |
| Our confidence | 80% |
| Coordinates | 39.7339, -104.4823 |
| Nearest City | Aurora (30 km) |
| Population Exposed | 1.9M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-06-01T21:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.0f5a9e4ff624a5e6fdada623e40efafe |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, CO; Central Arapahoe, CO |
| Headline | Tornado Warning issued June 1 at 3:06PM MDT until June 1 at 3:15PM MDT by NWS Denver CO |
| Expires | 2026-06-01T15:16:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0f5a9e4ff624a5e6fdada623e40efafe5d19c275.001.1","noaa_urn:oid:2.49.0.1.840.0.936ff817294b4f6b4e5e1f679436fcbdf7308944.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 76/100, near Aurora (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.