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 27 June 2026 at 22:34 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 15 March 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 4:24PM MDT until June 27 at 4:30PM MDT by NWS Billings MT
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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.57/1 |
| Coordinates | 46.0293, -106.6436 |
| Nearest City | Sheridan (139 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-27T22:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.701f9e2196e3b66935080f399dbc7f20 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-27T22:24:00.000Z.
First archived: 2026-06-27T22:26:29.694Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Big Horn, MT; Big Horn, MT; Rosebud, MT; Treasure, MT; Carter, MT; Fallon, MT and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 27 at 4:24PM MDT until June 27 at 4:30PM MDT by NWS Billings MT |
| Expires | 2026-06-27T16:34:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.701f9e2196e3b66935080f399dbc7f20cc2ca991.001.1","noaa_urn:oid:2.49.0.1.840.0.27cacf1ad9523f29f874feac4777e0dd28f61958.001.1","noaa_urn:oid:2.49.0.1.840.0.b9d22434a9ac8cb8432c414e3a3bb07940d83ffd.001.1","noaa_urn:oid:2.49.0.1.840.0.a3d3ce4c27ba18b879587140317f5690e687a022.001.1","noaa_urn:oid:2.49.0.1.840.0.d23b73cfc38e252a303da141784ced5303c0fe13.001.1","noaa_urn:oid:2.49.0.1.840.0.43873667f6ff704191c0f7bd60dee6913717f8c3.001.1","noaa_urn:oid:2.49.0.1.840.0.122dd8e840398e1cc26bd550624b4b39076a8826.001.1"] |
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.
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