Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 14 May 2026 at 02:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 21 detections recorded within 20 km of this point since 13 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 13 at 1:54PM MDT until May 13 at 8:00PM MDT by NWS Riverton WY
Nearby, since 13 May 2026
- July 3, 2026 · score 22 · 0.0 km
- June 28, 2026 · score 22 · 0.0 km
- June 8, 2026 · score 16 · 0.0 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 71% |
| Coordinates | 43.1000, -107.6000 |
| Nearest City | Casper (108 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-13T19:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.63d7921d1d3a32b47e43be9a2b36a4fb83f2dd96.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Fremont, WY; Lincoln, WY; Park, WY; Sublette, WY; Sweetwater, WY; Teton, WY |
| Headline | Severe Thunderstorm Watch issued May 13 at 1:54PM MDT until May 13 at 8:00PM MDT by NWS Riverton WY |
| Expires | 2026-05-13T20:00:00-06:00 |
| SenderName | NWS Riverton WY |
| HasExactCoords | false |
| Iem TypeSummary | N |
| Iem Magnitude | 63 |
| Iem Unit | MPH |
| Iem City | 13 S Thermopolis |
| Iem County | Hot Springs |
| Iem State | WY |
| Iem Wfo | RIW |
| Iem Remark | AWOS station KTBX Boysen Peak (AWOS). |
| MergedSources | [{"id":"iem_N_43.070_-108.470_1778716260000","source":"iem","severity":"low","severityValue":25,"timestamp":1778716260000,"latitude":43.07,"longitude":-108.47},{"id":"iem_N_43.030_-106.800_1778709120000","source":"iem","severity":"low","severityValue":25,"timestamp":1778709120000,"latitude":43.03,"longitude":-106.8},{"id":"iem_N_43.090_-107.320_1778710620000","source":"iem","severity":"low","severityValue":25,"timestamp":1778710620000,"latitude":43.09,"longitude":-107.32},{"id":"iem_N_43.470_-108.230_1778717700000","source":"iem","severity":"low","severityValue":25,"timestamp":1778717700000,"latitude":43.47,"longitude":-108.23}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 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.
Want to know when something happens in this area?
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 185 scientific monitoring sources.