This alert expired on 11 July 2026 at 01:37 UTC. It is kept here as a record.
It is the 2nd strongest of the 20 detections recorded within 20 km of this point since 3 June 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 10 at 7:27PM MDT until July 10 at 7:30PM MDT by NWS Denver CO
Nearby, since 3 June 2026
- July 29, 2026 · score 22 · 6.9 km
- June 24, 2026 · score 22 · 9.8 km
- July 29, 2026 · score 22 · 16.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % 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) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 39.9855, -104.1152 |
| Nearest City | Brighton (60 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-11T01:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e9dcc7fe4a39828ea9fbddd0f6e10c59 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, CO; Central Arapahoe, CO; Eastern Arapahoe, CO; Weld, CO |
| Headline | Severe Thunderstorm Warning issued July 10 at 7:27PM MDT until July 10 at 7:30PM MDT by NWS Denver CO |
| Expires | 2026-07-10T19:37:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e9dcc7fe4a39828ea9fbddd0f6e10c5907b9836f.001.1","noaa_urn:oid:2.49.0.1.840.0.f54ed9c1be7fd8ac890ac0840dc1fc9d4a7c1501.001.1"] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.