This alert expired on 17 July 2026 at 01:30 UTC. It is kept here as a record.
It is the strongest of the 8 detections recorded within 20 km of this point since 9 May 2026. The last comparable one was on 27 June 2026.
What the source measured
NOAA reported: Flash Flood Warning issued July 16 at 4:28PM MDT until July 16 at 7:30PM MDT by NWS Riverton WY
Nearby, since 9 May 2026
- July 17, 2026 · score 16 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % 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) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 44.1570, -107.7290 |
| Nearest City | Sheridan (94 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-16T22:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.230c663dfdba297f55e8e649989c11287cd932bf.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Big Horn, WY; Washakie, WY |
| Headline | Flash Flood Warning issued July 16 at 4:28PM MDT until July 16 at 7:30PM MDT by NWS Riverton WY |
| Expires | 2026-07-16T19:30:00-06:00 |
| SenderName | NWS Riverton WY |
| HasExactCoords | true |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.