Right now
The most recent data we hold from NOAA arrived 21 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 6 September 2026 at 03:45 UTC. It is kept here as a record.
No stronger detection stands among the 33 recorded within 20 km of this point since 23 April 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 5 at 9:22PM MDT until September 5 at 9:45PM MDT by NWS Denver CO
Nearby, since 23 April 2026
- July 9, 2026 · 22.6 km
- July 8, 2026 · 23.7 km
- June 24, 2026 · 23.7 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.67/1 |
| Coordinates | 40.9980, -103.1580 |
| Nearest City | Cheyenne (140 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-06T03:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.54039c133f27ce013de6125202553f6f1f6f50cf.001.1 |
Physical priority index · v4 (historical). 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: 2026-09-06T03:22:00.000Z.
First archived: 2026-09-06T03:26:38.413Z. 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; Cheyenne, NE |
| Headline | Severe Thunderstorm Warning issued September 5 at 9:22PM MDT until September 5 at 9:45PM MDT by NWS Denver CO |
| Expires | 2026-09-05T21:45:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.54039c133f27ce013de6125202553f6f1f6f50cf.001.1","noaa_urn:oid:2.49.0.1.840.0.75c27f93b14fd53d0bd8ed7e7ad70f5ad3394513.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | Chappell |
| Spc County | Deuel |
| Spc State | NE |
| Spc Comments | Social media photo. (LBF) |
| MergedSources | [{"id":"spc_hail_40.62_-103.21_308","source":"spc","severity":"high","severityValue":65,"timestamp":1788665486268,"latitude":40.62,"longitude":-103.21},{"id":"spc_hail_41.09_-102.47_314","source":"spc","severity":"high","severityValue":65,"timestamp":1788653160000,"latitude":41.09,"longitude":-102.47}] |
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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