This alert is in force until 31 August 2026, 05:15 UTC.
No stronger detection stands among the 39 recorded within 20 km of this point since 15 July 2026 — 5 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 5:25PM MST until August 30 at 10:15PM MST by NWS Flagstaff AZ
Nearby, since 15 July 2026
- July 30, 2026 · score 22 · 7.9 km
- July 29, 2026 · score 22 · 15.6 km
- July 30, 2026 · score 22 · 24.4 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 | 37.1117, -111.8931 |
| Nearest City | Cedar City (121 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T00:25:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coconino, AZ; Kane, UT |
| Headline | Flash Flood Warning issued August 30 at 5:25PM MST until August 30 at 10:15PM MST by NWS Flagstaff AZ |
| Expires | 2026-08-30T22:15:00-07:00 |
| SenderName | NWS Flagstaff AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["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.