This alert is in force until 31 August 2026, 19:15 UTC.
It is the 19th strongest of the 23 detections recorded within 20 km of this point since 17 July 2026. The last comparable one was on 30 August 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 31 at 10:19AM MDT until August 31 at 1:15PM MDT by NWS Salt Lake City UT
Nearby, since 17 July 2026
- July 26, 2026 · score 22 · 5.1 km
- August 9, 2026 · score 22 · 15.1 km
- August 12, 2026 · score 22 · 19.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 66 % 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 | 66% |
| Coordinates | 37.6592, -111.5290 |
| Nearest City | Cedar City (135 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T16:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ae0547d4eacd571c2e7efa4e42f5803c0fb20fd3.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Garfield, UT; Wayne, UT; Garfield, UT; Coconino, AZ |
| Headline | Flash Flood Warning issued August 31 at 10:19AM MDT until August 31 at 1:15PM MDT by NWS Salt Lake City UT |
| Expires | 2026-08-31T13:15:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ae0547d4eacd571c2e7efa4e42f5803c0fb20fd3.001.1","noaa_urn:oid:2.49.0.1.840.0.5b0675f3778bbaba8e8ef5109b734b97e7dac31c.001.1","noaa_urn:oid:2.49.0.1.840.0.942aea99b212d7600b85e4e8bfcc70f25a9033ff.001.1"] |
| Iem TypeSummary | F |
| Iem City | 14 WNW Big Water |
| Iem County | Kane |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | 429 cfs flood wave reported by the gauge at US-89. |
| MergedSources | [{"id":"iem_F_37.110_-111.910_1788184800000","source":"iem","severity":"low","severityValue":25,"timestamp":1788184800000,"latitude":37.11,"longitude":-111.91}] |
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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.