Right now
The most recent data we hold from NOAA arrived 6 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 27 June 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 11 recorded within 20 km of this point since 20 June 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 3:54PM MDT until June 27 at 4:30PM MDT by NWS Riverton WY
Nearby, since 20 June 2026
- August 27, 2026 · score 16 · 11.2 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 67 % 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 | 67% |
| Coordinates | 43.0257, -108.1190 |
| Nearest City | Casper (148 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-27T21:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.f73016ffcec7af287d9fc98679f5c4ce |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fremont, WY; Fremont, WY; Natrona, WY |
| Headline | Severe Thunderstorm Warning issued June 27 at 3:54PM MDT until June 27 at 4:30PM MDT by NWS Riverton WY |
| Expires | 2026-06-27T16:30:00-06:00 |
| SenderName | NWS Riverton WY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f73016ffcec7af287d9fc98679f5c4ce51f95dad.001.1","noaa_urn:oid:2.49.0.1.840.0.d92640e8fac7712b55508fb96db53fb5a47d3f4e.001.1","noaa_urn:oid:2.49.0.1.840.0.ab15e5f17daa6a6c5aa9bc3a11e0e7d0ba692161.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 66 |
| Iem Unit | MPH |
| Iem City | 3 NE Lander |
| Iem County | Fremont |
| Iem State | WY |
| Iem Wfo | RIW |
| Iem Remark | Mesonet station PC259 Wyopo (PC). |
| MergedSources | [{"id":"iem_G_42.950_-108.610_1782593160000","source":"iem","severity":"low","severityValue":25,"timestamp":1782593160000,"latitude":42.95,"longitude":-108.61},{"id":"iem_G_42.820_-108.730_1782593580000","source":"iem","severity":"low","severityValue":25,"timestamp":1782593580000,"latitude":42.82,"longitude":-108.73},{"id":"iem_G_42.850_-108.680_1782592200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782592200000,"latitude":42.85,"longitude":-108.68}] |
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.