Right now
The most recent data we hold from NOAA arrived 27 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 23:32 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 8 April 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 5:22PM MDT until June 27 at 5:30PM MDT by NWS Billings MT
Nearby, since 8 April 2026
- June 3, 2026 · score 22 · 18.4 km
How we know
3 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 | 46.0419, -104.6497 |
| Nearest City | Dickinson (170 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-06-27 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e59a4adbeee1f4a9412280ae8d65a970 |
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: 2026-06-27 — time not reported.
First archived: 2026-06-27T23:23:17.044Z. 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; Treasure, MT; Carter, MT; Custer, MT; Fallon, MT; Garfield, MT and 8 more areas |
| Headline | Severe Thunderstorm Warning issued June 27 at 5:22PM MDT until June 27 at 5:30PM MDT by NWS Billings MT |
| Expires | 2026-06-27T17:32:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e59a4adbeee1f4a9412280ae8d65a9706ca51f0b.001.1","noaa_urn:oid:2.49.0.1.840.0.9cdbcc438a5afb2d0425988310be40b7e94aa94c.001.1","noaa_urn:oid:2.49.0.1.840.0.ab47ef2afd3db735a7c8f6b9bd443ed06b552990.001.1","noaa_urn:oid:2.49.0.1.840.0.a855da30f7eef91fe6d452adde8bd5499a19e02f.001.1","noaa_urn:oid:2.49.0.1.840.0.05b8578dc7e9f142e96e91252ec8184fe57d359d.001.1","noaa_urn:oid:2.49.0.1.840.0.9806a73e03fa20ff3b92007356755b394b901a17.001.1","noaa_urn:oid:2.49.0.1.840.0.fef414d7955747d31b2ef0cdc1daa3709e5c94d1.001.1","noaa_urn:oid:2.49.0.1.840.0.d918ddd6f6c7662b696d9aca7efe35ae58fcf9a3.001.1","noaa_urn:oid:2.49.0.1.840.0.f02e3f47a905a1d97f5c4532f232c6dcf8955da8.001.1","noaa_urn:oid:2.49.0.1.840.0.7f06434f1ffdf38bc282024e0b60fde6276ff875.001.1","noaa_urn:oid:2.49.0.1.840.0.1c0b4b22ae0240db75b0a51cf6565dc3a86a65d2.001.1","noaa_urn:oid:2.49.0.1.840.0.37d89dcf5ef537703bfec7999cf80cf4dc4193a3.001.1","noaa_urn:oid:2.49.0.1.840.0.ee80fef3f83428995f33d671b9b912deae08a8bd.001.1","noaa_urn:oid:2.49.0.1.840.0.985d0be6f89ebe458a0107b26e9f2620e430080f.001.1"] |
| Iem TypeSummary | C |
| Iem City | 8 SE Ekalaka |
| Iem County | Carter |
| Iem State | MT |
| Iem Wfo | BYZ |
| Iem Remark | Report from EM. |
| 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_C_45.820_-104.430_1782600300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782600300000,"latitude":45.82,"longitude":-104.43}] |
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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