This alert expired on 30 August 2026 at 02:45 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 29 July 2026 — 7 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 29 at 6:45PM MST until August 29 at 7:45PM MST by NWS Flagstaff AZ
Nearby, since 29 July 2026
- July 30, 2026 · score 22 · 5.4 km
- August 30, 2026 · score 28 · 18.9 km
- July 30, 2026 · score 22 · 22.0 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 72 % 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 | 72% |
| Coordinates | 36.8937, -111.7020 |
| Nearest City | Hurricane (144 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T01:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.a5f947b2f6d51f4cb252ae9dcdb0078e |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coconino, AZ; Kane, UT; San Juan, UT; Kane, UT |
| Headline | Flash Flood Warning issued August 29 at 6:45PM MST until August 29 at 7:45PM MST by NWS Flagstaff AZ |
| Expires | 2026-08-29T19:45:00-07:00 |
| SenderName | NWS Flagstaff AZ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a5f947b2f6d51f4cb252ae9dcdb0078ebce6cab1.001.1","noaa_urn:oid:2.49.0.1.840.0.e705941c64c8f3fc99dc28a60b071dc051d47371.001.1","noaa_urn:oid:2.49.0.1.840.0.a74802433ea8abbb42d9d820fc09819bf4a8acf0.001.1","noaa_urn:oid:2.49.0.1.840.0.74dc34b84a1179a2cf63f701a3379de5da48e05f.001.1","noaa_urn:oid:2.49.0.1.840.0.3f6cef28a247db22ebc21f90857f3051925040ae.001.1","noaa_urn:oid:2.49.0.1.840.0.3180644451cf882c5cd800a72937ce5e8ae3196e.001.1","noaa_urn:oid:2.49.0.1.840.0.eb78c70d614c522ed611c2267e3a6464a123fbf1.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 75 |
| Spc Location | 3 WNW Big Water |
| Spc County | Kane |
| Spc State | UT |
| Spc Comments | Mesonet station PC567 Big Water West. (SLC) |
| Iem TypeSummary | F |
| Iem City | 1 NNE Big Water |
| Iem County | Kane |
| Iem State | UT |
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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.