Right now
The most recent data we hold from NOAA arrived 4 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 13 May 2026 at 23:30 UTC. It is kept here as a record.
It is the strongest of the 13 detections recorded within 20 km of this point since 2 April 2026. The last comparable one was on 7 April 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 4:27PM MDT until May 13 at 5:30PM MDT by NWS Riverton WY
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 70 % 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 | 70% |
| Coordinates | 43.3404, -111.1164 |
| Nearest City | Idaho Falls (75 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-13T22:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.45296afb152363fe3edc57185df8ce57 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Park, WY; Teton, WY; Clark, ID; Fremont, ID; Park, MT; Stillwater, MT; Sweet Grass, MT and 4 more areas |
| Headline | Severe Thunderstorm Warning issued May 13 at 4:27PM MDT until May 13 at 5:30PM MDT by NWS Riverton WY |
| Expires | 2026-05-13T17:30:00-06:00 |
| SenderName | NWS Riverton WY |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.45296afb152363fe3edc57185df8ce5755713076.001.1","noaa_urn:oid:2.49.0.1.840.0.4c3d1ddf224be8adc906b96f12964f9c25f1fb1d.001.1","noaa_urn:oid:2.49.0.1.840.0.eb4bdb63259df0e8f5b334fbc9b84d74fd938db5.001.1","noaa_urn:oid:2.49.0.1.840.0.822062566dc78c28247eafe3c36a9c9c62d60f0f.001.1","noaa_urn:oid:2.49.0.1.840.0.724a7b8725a48b3cb2c100428cff760b9a4c72cd.001.1","noaa_urn:oid:2.49.0.1.840.0.d0ea7060ca6e5f66fdd1b9270d06e57d21e739f3.001.1","noaa_urn:oid:2.49.0.1.840.0.aa398fb9f72d285b4cd5e778601fbf546cfa945e.002.1"] |
| Iem TypeSummary | D |
| Iem City | 5 ENE Newdale |
| Iem County | Madison |
| Iem State | ID |
| Iem Wfo | PIH |
| Iem Remark | power outages. |
| MergedSources | [{"id":"iem_D_43.530_-111.930_1778701920000","source":"iem","severity":"low","severityValue":25,"timestamp":1778701920000,"latitude":43.53,"longitude":-111.93},{"id":"iem_G_43.810_-111.420_1778702400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702400000,"latitude":43.81,"longitude":-111.42},{"id":"iem_G_43.710_-111.340_1778699700000","source":"iem","severity":"low","severityValue":25,"timestamp":1778699700000,"latitude":43.71,"longitude":-111.34},{"id":"iem_G_43.880_-111.360_1778702400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702400000,"latitude":43.88,"longitude":-111.36},{"id":"iem_G_43.710_-111.340_1778702400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702400000,"latitude":43.71,"longitude":-111.34},{"id":"iem_D_43.910_-111.510_1778708340000","source":"iem","severity":"low","severityValue":25,"timestamp":1778708340000,"latitude":43.91,"longitude":-111.51}] |
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.