This alert expired on 13 August 2026 at 23:18 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 17 July 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 13 at 4:08PM PDT until August 13 at 4:15PM PDT by NWS Las Vegas NV
An estimated 112,697 people live within 50 km of this point.
Nearby, since 17 July 2026
- July 29, 2026 · score 43 · 5.9 km
- July 19, 2026 · score 34 · 10.4 km
- July 18, 2026 · score 43 · 13.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 83 % 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) | 43 / 100 |
| Our confidence | 83% |
| Coordinates | 36.9595, -113.0642 |
| Nearest City | Hurricane (32 km) |
| Population Exposed | 112.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T23:08:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.e4553db424a31ad6390035d74e85b5bf |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | San Bernardino, CA; Clark, NV; Clark, NV; Lincoln, NV; Washington, UT and 3 more areas |
| Headline | Flash Flood Warning issued August 13 at 4:08PM PDT until August 13 at 4:15PM PDT by NWS Las Vegas NV |
| Expires | 2026-08-13T16:18:00-07:00 |
| SenderName | NWS Las Vegas NV |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e4553db424a31ad6390035d74e85b5bffe6c353f.001.1","noaa_urn:oid:2.49.0.1.840.0.9380f4b897c2f47cc8f7fd824e7b50f16456c745.001.1","noaa_urn:oid:2.49.0.1.840.0.15a23f87dc6b6b40bf40c6b634d60e9cadbfee4b.001.1","noaa_urn:oid:2.49.0.1.840.0.4a7c8c874c2fdffff8f47122569f3d805c04838b.001.1","noaa_urn:oid:2.49.0.1.840.0.71d06fcbff5c3467384d434cd8535bc3e50b434a.001.1","noaa_urn:oid:2.49.0.1.840.0.caedbff6d482948d2619db3dbc81eb4f5dc68c33.001.1","noaa_urn:oid:2.49.0.1.840.0.65503c4a27246b7c9d95d31fc87d0055f57e3f80.001.1","noaa_urn:oid:2.49.0.1.840.0.5cf6577bf0744ddafd5e3f2ac7e53f4faf5c2cde.001.1"] |
| Iem TypeSummary | F |
| Iem City | 2 NNW Zion National Par |
| Iem County | Washington |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | Zion National Park reported flash flooding in all slot canyons west of Scenic Drive, including Behunin, Telephone and Refrigerator. |
| MergedSources | [{"id":"iem_F_37.280_-112.970_1786657740000","source":"iem","severity":"low","severityValue":25,"timestamp":1786657740000,"latitude":37.28,"longitude":-112.97}] |
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 43/100, near Hurricane (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.