This alert is in force until 31 August 2026, 00:45 UTC.
It is the 3rd strongest of the 7 detections recorded within 20 km of this point since 17 July 2026. The last comparable one was on 21 July 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 30 at 5:19PM MDT until August 30 at 6:45PM MDT by NWS Grand Junction CO
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 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) | 16 / 100 |
| Our confidence | 65% |
| Coordinates | 37.7124, -111.0347 |
| Nearest City | Cedar City (178 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T23:19:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Grand, UT; Garfield, UT; Kane, UT; Wayne, UT and 3 more areas |
| Headline | Flash Flood Warning issued August 30 at 5:19PM MDT until August 30 at 6:45PM MDT by NWS Grand Junction CO |
| Expires | 2026-08-30T18:45:00-06:00 |
| SenderName | NWS Grand Junction CO |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["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.dc37a73ab365a51e6ef9e362906b26eecdcd84ce.001.1","noaa_urn:oid:2.49.0.1.840.0.c7827d6ce071904a15d0a364eed9d0561f0dfd49.001.1","noaa_urn:oid:2.49.0.1.840.0.62d41bcf611aa5094be867f40eec04af7ccae95c.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 16/100, near Cedar City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.