Right now
The most recent data we hold from NOAA arrived 7 hours 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 1 June 2026 at 20:30 UTC. It is kept here as a record.
No stronger detection stands among the 101 recorded within 20 km of this point since 15 March 2026 — 17 others scored the same. 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 June 1 at 1:38PM MDT until June 1 at 2:30PM MDT by NWS Denver CO
Urban PEI: 2,615,321 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 1, 2026 · score 52 · 7.1 km
- July 28, 2026 · score 52 · 12.1 km
- July 22, 2026 · score 52 · 13.8 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 39.8983, -104.8144 |
| Nearest City | Brighton (10 km) |
| Urban exposure index (PEI) | 2.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-01T19:38:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4453fc17b7c089241364edfa79a9deb3 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-01T19:38:00.000Z.
First archived: 2026-06-01T19:42:22.044Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, CO; Western Arapahoe, CO; Denver, CO; Northeast Boulder, CO; Weld, CO; Douglas, CO; Elbert, CO and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 1 at 1:38PM MDT until June 1 at 2:30PM MDT by NWS Denver CO |
| Expires | 2026-06-01T14:30:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4453fc17b7c089241364edfa79a9deb3f79fa231.001.1","noaa_urn:oid:2.49.0.1.840.0.3ca627cae2cfdc27b134043b501ec587f22c0d30.001.1","noaa_urn:oid:2.49.0.1.840.0.aefcfc19e976e4eb5b2c495c8306ed84c176b6af.001.1","noaa_urn:oid:2.49.0.1.840.0.df8eaa99f995f5cf822298a49e457a3f0a85a4a7.001.1","noaa_urn:oid:2.49.0.1.840.0.daf8c038be9a9919ce75c1498ef28d698e72d093.001.1","noaa_urn:oid:2.49.0.1.840.0.9cecbcea4172b03dfbbed6b9938c290b6c2799f4.001.1","noaa_urn:oid:2.49.0.1.840.0.e8fa97bcaec7ffb34b088a224c38a9a35f9d1bd0.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
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