This alert expired on 31 August 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 25 June 2026 — 8 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Flash Flood Warning issued August 30 at 6:09PM MDT until August 30 at 7:00PM MDT by NWS Grand Junction CO
Nearby, since 25 June 2026
- August 31, 2026 · score 22 · 20.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 65% |
| Coordinates | 37.7921, -110.7181 |
| Nearest City | Cedar City (206 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T00:09:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Dolores, CO; Mesa, CO; Grand, UT and 5 more areas |
| Headline | Flash Flood Warning issued August 30 at 6:09PM MDT until August 30 at 7:00PM MDT by NWS Grand Junction CO |
| Expires | 2026-08-30T19:00:00-06:00 |
| SenderName | NWS Grand Junction CO |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.96836cc0fb3e6005c8bf5bc75afd84013f11f1d6.001.1","noaa_urn:oid:2.49.0.1.840.0.88da34f8c70b3b176faa444d0ebb34642731e445.001.1","noaa_urn:oid:2.49.0.1.840.0.ec9d8a0606fc33c83208ef426d56ba98820b5295.001.1","noaa_urn:oid:2.49.0.1.840.0.ec9d8a0606fc33c83208ef426d56ba98820b5295.001.1","noaa_urn:oid:2.49.0.1.840.0.6d902722ce27c9703dc8ddf0c3413c7c580df7d5.001.1","noaa_urn:oid:2.49.0.1.840.0.6d902722ce27c9703dc8ddf0c3413c7c580df7d5.001.1","noaa_urn:oid:2.49.0.1.840.0.96b9736cf7bde62b3950aa34fd205066d4e82bab.001.1","noaa_urn:oid:2.49.0.1.840.0.96b9736cf7bde62b3950aa34fd205066d4e82bab.001.1","noaa_urn:oid:2.49.0.1.840.0.ab8953c1e03272e3e72004545f8cccee59de79e8.001.1","noaa_urn:oid:2.49.0.1.840.0.ab8953c1e03272e3e72004545f8cccee59de79e8.001.1","noaa_urn:oid:2.49.0.1.840.0.a6915903528d9932cb5a29a69a64669396e9c3a4.001.1","noaa_urn:oid:2.49.0.1.840.0.b40ff496f678273436a6568e74f82834becf76af.001.1","noaa_urn:oid:2.49.0.1.840.0.808eb98ed8c71463536c5100518819858ce0ddaf.001.1","noaa_urn:oid:2.49.0.1.840.0.4dd5c348480260d5be0217358d8d9df996b7695d.001.1"] |
| Iem TypeSummary | F |
| Iem City | 2 NE Fruita |
| Iem County | Wayne |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | Park Service employees relayed report(s) of waterfalls forming on the north side of Highway 24. Location estimated. |
| MergedSources | [{"id":"iem_F_38.310_-111.230_1788131400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788131400000,"latitude":38.31,"longitude":-111.23}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 22/100, near Cedar City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.