Right now
The most recent data we hold from NOAA arrived 33 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 23:45 UTC. It is kept here as a record.
No stronger detection stands among the 8 recorded within 20 km of this point since 16 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 5:01PM MDT until June 27 at 5:45PM MDT by NWS Billings MT
How we know
4 recorded sources include NOAA; independence is not established by this count.
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 | 0.67/1 |
| Coordinates | 45.7062, -105.1895 |
| Nearest City | Gillette (159 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-27T23:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a855da30f7eef91fe6d452adde8bd549 |
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: 2026-06-27T23:01:00.000Z.
First archived: 2026-06-27T23:02:32.110Z. 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 | Rosebud, MT; Carter, MT; Custer, MT; Powder River, MT; Harding, SD and 6 more areas |
| Headline | Severe Thunderstorm Warning issued June 27 at 5:01PM MDT until June 27 at 5:45PM MDT by NWS Billings MT |
| Expires | 2026-06-27T17:45:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a855da30f7eef91fe6d452adde8bd5499a19e02f.001.1","noaa_urn:oid:2.49.0.1.840.0.4c4ea921904fcfea6512ddf8bf7f84c70a5dd3ca.001.1","noaa_urn:oid:2.49.0.1.840.0.ec28237c423fc96421d438b7b5eccc8e5729614e.001.1","noaa_urn:oid:2.49.0.1.840.0.bee04a1ad0bff989420b7bb299fd0ee8a284e0bc.002.1","noaa_urn:oid:2.49.0.1.840.0.b99bb15e5d741e922a36d6cf655bdc792a93fc39.001.1","noaa_urn:oid:2.49.0.1.840.0.42789cfeeab9b4f4fbe0ba3f4e6b932eccd8d0a3.001.1","noaa_urn:oid:2.49.0.1.840.0.9806a73e03fa20ff3b92007356755b394b901a17.001.1","noaa_urn:oid:2.49.0.1.840.0.523e8bc77099ead0f39e0936f08597b8449c98a9.001.1","noaa_urn:oid:2.49.0.1.840.0.b26166cc8240851cbd9d7f4f1fb851c8a3d3b80d.001.1","noaa_urn:oid:2.49.0.1.840.0.43873667f6ff704191c0f7bd60dee6913717f8c3.001.1","noaa_urn:oid:2.49.0.1.840.0.05b8578dc7e9f142e96e91252ec8184fe57d359d.001.1","noaa_urn:oid:2.49.0.1.840.0.8ef15b8fc3b3b6b83092b7ba96701d62406d19e5.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 2 |
| Iem Unit | Inch |
| Iem City | 1 SSE Belle Creek |
| Iem County | Carter |
| Iem State | MT |
| Iem Wfo | BYZ |
| MergedSources | [{"id":"iem_H_45.890_-104.550_1782598680000","source":"iem","severity":"low","severityValue":25,"timestamp":1782598680000,"latitude":45.89,"longitude":-104.55},{"id":"iem_H_45.100_-105.320_1782597720000","source":"iem","severity":"low","severityValue":25,"timestamp":1782597720000,"latitude":45.1,"longitude":-105.32},{"id":"iem_H_45.100_-105.030_1782598620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782598620000,"latitude":45.1,"longitude":-105.03}] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?