Right now
The most recent data we hold from NOAA arrived 9 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 4 July 2026 at 07:30 UTC. It is kept here as a record.
It is the 34th strongest of the 75 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day. 31 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 4 at 12:18AM MDT until July 4 at 1:30AM MDT by NWS Denver CO
Nearby, since 6 May 2026
- August 12, 2026 · score 22 · 19.4 km
- June 23, 2026 · score 22 · 22.0 km
- September 5, 2026 · score 28 · 23.4 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
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 | 0.70/1 |
| Coordinates | 40.4890, -102.9929 |
| Nearest City | Evans (144 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-04T06:18:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.24518acf14571e11b4fb86edc9bf6dae36d0496f.001.1 |
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: 2026-07-04T06:18:00.000Z.
First archived: 2026-07-04T06:21:33.097Z. 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 | Logan, CO; Washington, CO |
| Headline | Flash Flood Warning issued July 4 at 12:18AM MDT until July 4 at 1:30AM MDT by NWS Denver CO |
| Expires | 2026-07-04T01:30:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 WNW Union |
| Iem County | Morgan |
| Iem State | CO |
| Iem Wfo | BOU |
| Iem Remark | Time estimated from radar. |
| MergedSources | [{"id":"iem_F_40.470_-103.010_1783142100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783142100000,"latitude":40.47,"longitude":-103.01},{"id":"iem_H_40.480_-103.080_1783130700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783130700000,"latitude":40.48,"longitude":-103.08},{"id":"iem_H_40.360_-103.540_1783129560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783129560000,"latitude":40.36,"longitude":-103.54}] |
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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