This alert expired on 31 August 2026 at 02:06 UTC. It is kept here as a record.
No stronger detection stands among the 26 recorded within 20 km of this point since 21 July 2026 — 4 others scored the same. The last comparable one was on 30 August 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 30 at 7:56PM MDT until August 30 at 8:00PM MDT by NWS Salt Lake City UT
Nearby, since 21 July 2026
- August 29, 2026 · score 28 · 18.4 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 71% |
| Coordinates | 37.2549, -111.4940 |
| Nearest City | Cedar City (146 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T01:56:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Kane, UT; Garfield, UT; Kane, UT; San Juan, UT; Coconino, AZ |
| Headline | Flash Flood Warning issued August 30 at 7:56PM MDT until August 30 at 8:00PM MDT by NWS Salt Lake City UT |
| Expires | 2026-08-30T20:06:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.be5b94f97fe78ee3d6cb0f79a324e5de69bcd7cb.001.1","noaa_urn:oid:2.49.0.1.840.0.0175eb812a34eab594d7045726e68f168a9ccdac.001.1","noaa_urn:oid:2.49.0.1.840.0.9ac01190be1a546f1b8580959c874058e1b0b644.001.1","noaa_urn:oid:2.49.0.1.840.0.61d95f82ed28a963ceaf66d4b793e99af0d687cf.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 1 N Big Water |
| Spc County | Kane |
| Spc State | UT |
| Spc Comments | Quarter-sized hail reported in Big Water. (SLC) |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | 6 W Big Water |
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 28/100, near Cedar City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.