Right now
The most recent data we hold from NOAA arrived 17 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 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 56 recorded within 20 km of this point since 15 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 26 at 6:31PM MDT until June 26 at 7:00PM MDT by NWS Billings MT
Urban PEI: 32,649 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 27, 2026 · score 34 · 2.3 km
- July 30, 2026 · score 34 · 13.8 km
- July 29, 2026 · score 34 · 21.4 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 44.3556, -105.5498 |
| Nearest City | Gillette (8 km) |
| Urban exposure index (PEI) | 32.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-27T00:31:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cfd761bf0a174552576296fb1c190e40 |
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: 2026-06-27T00:31:00.000Z.
First archived: 2026-06-27T00:39:02.912Z. 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; Rosebud, MT; Crook, WY; Weston, WY; Big Horn, MT; Powder River, MT; Sheridan, WY and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 26 at 6:31PM MDT until June 26 at 7:00PM MDT by NWS Billings MT |
| Expires | 2026-06-26T19:00:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cfd761bf0a174552576296fb1c190e4029004dc7.002.1","noaa_urn:oid:2.49.0.1.840.0.d40c8a0ee215ca24930b76d39f5b302f590648eb.002.1","noaa_urn:oid:2.49.0.1.840.0.d61317235161e182608bf2275d2981ea0dc95896.001.1","noaa_urn:oid:2.49.0.1.840.0.eb40bc345a21d24d9f6285fb4c87a1ba90f5b5b6.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 70 |
| Iem Unit | mph |
| Iem City | 5 NNW Dwtn Gillette |
| Iem County | Campbell |
| Iem State | WY |
| Iem Wfo | UNR |
| MergedSources | [{"id":"iem_G_43.920_-105.980_1782516060000","source":"iem","severity":"low","severityValue":25,"timestamp":1782516060000,"latitude":43.92,"longitude":-105.98},{"id":"iem_G_43.920_-105.980_1782516600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782516600000,"latitude":43.92,"longitude":-105.98},{"id":"iem_G_44.210_-105.810_1782514200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782514200000,"latitude":44.21,"longitude":-105.81},{"id":"iem_G_44.470_-105.840_1782517320000","source":"iem","severity":"low","severityValue":25,"timestamp":1782517320000,"latitude":44.47,"longitude":-105.84},{"id":"iem_G_44.350_-105.540_1782516660000","source":"iem","severity":"low","severityValue":25,"timestamp":1782516660000,"latitude":44.35,"longitude":-105.54}] |
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.
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