Right now
The most recent data we hold from NOAA arrived 32 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 7 km from here.
This alert expired on 23 July 2026 at 00:07 UTC. It is kept here as a record.
It is the 2nd strongest of the 35 detections recorded within 20 km of this point since 31 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 22 at 5:57PM MDT until July 22 at 6:00PM MDT by NWS Denver CO
Urban PEI: 19,889 within a heuristic 50 km radius; not unique people.
Nearby, since 31 March 2026
- July 18, 2026 · score 39 · 12.7 km
- August 31, 2026 · score 34 · 18.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 39.0295, -107.9494 |
| Nearest City | Clifton (44 km) |
| Urban exposure index (PEI) | 19.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-22T23:57:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.c02d2ad207e89f717551e2d3a8120779 |
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: 2026-07-22T23:57:00.000Z.
First archived: 2026-07-22T23:59:52.736Z. 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 | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Jefferson, CO; Park, CO; Garfield, CO; Rio Blanco, CO and 4 more areas |
| Headline | Flash Flood Warning issued July 22 at 5:57PM MDT until July 22 at 6:00PM MDT by NWS Denver CO |
| Expires | 2026-07-22T18:07:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c02d2ad207e89f717551e2d3a8120779fd6e45de.001.1","noaa_urn:oid:2.49.0.1.840.0.10259789c1ce11cc500b67c3928a89611d0037da.001.1","noaa_urn:oid:2.49.0.1.840.0.e3e0f07f850311fbfed09163ea5c71b0611bc9da.001.1","noaa_urn:oid:2.49.0.1.840.0.4630682db5e85dcbc1600b364e9f02b0310cfb7e.001.1","noaa_urn:oid:2.49.0.1.840.0.39e284420492b7622f575c703bd77cc6b210ead6.001.1","noaa_urn:oid:2.49.0.1.840.0.748f5c69627e419cade846b17443427ed8c2995a.001.1","noaa_urn:oid:2.49.0.1.840.0.ee4d3df8ed4a4e54b4436a37886eb9db90abe7b9.001.1","noaa_urn:oid:2.49.0.1.840.0.851d3db1bbf21b841bf417ebbede1aa26927c5cc.001.1","noaa_urn:oid:2.49.0.1.840.0.5e8b21cb812aa5e013a0876f04d2988b9ee7d367.001.1"] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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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