Right now
The most recent data we hold from NOAA arrived 3 minutes 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 28 July 2026 at 21:45 UTC. It is kept here as a record.
It is the 12th strongest of the 50 detections recorded within 20 km of this point since 21 May 2026. The last comparable one was on 23 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 28 at 3:04PM MDT until July 28 at 3:45PM MDT by NWS Denver CO
Nearby, since 21 May 2026
- May 21, 2026 · score 46 · 11.1 km
- June 25, 2026 · score 46 · 19.1 km
- July 4, 2026 · score 46 · 22.9 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.
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) | 22 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 40.5159, -103.5326 |
| Nearest City | Evans (99 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-07-28 — 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.faf1a5579721cb539ec21fe051df6b1e |
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: 2026-07-28 — time not reported.
First archived: 2026-07-28T21:05:08.482Z. 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 | Logan, CO; Western Arapahoe, CO; Central Arapahoe, CO; Douglas, CO; Elbert, CO; Cheyenne, NE and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 28 at 3:04PM MDT until July 28 at 3:45PM MDT by NWS Denver CO |
| Expires | 2026-07-28T15:45:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.faf1a5579721cb539ec21fe051df6b1efea06af8.001.1","noaa_urn:oid:2.49.0.1.840.0.16336c157f1e93e090f0231538e4a2f5371c7c94.001.1","noaa_urn:oid:2.49.0.1.840.0.e71d9af0f3261898e0b9fd5a1bfc79ead95d9b8b.002.1","noaa_urn:oid:2.49.0.1.840.0.5c68caaf470a798a6d633f6e23fc4794b41bc484.001.1","noaa_urn:oid:2.49.0.1.840.0.f998bd06b42fdc850b883d741982de6d11a84c4b.001.1","noaa_urn:oid:2.49.0.1.840.0.c903f950c81db86e0a78c0859512468965718082.001.1","noaa_urn:oid:2.49.0.1.840.0.a14ea9df0cfbaad4039280fa32837aaf900ac3ec.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.
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