Right now
The most recent data we hold from NOAA arrived 5 hours 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 3 July 2026 at 23:45 UTC. It is kept here as a record.
No stronger detection stands among the 10 recorded within 20 km of this point since 8 April 2026 — one other scored the same. The last comparable one was on 14 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 5:10PM MDT until July 3 at 5:45PM 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 | 0.58/1 |
| Coordinates | 46.8512, -106.5789 |
| Nearest City | Billings (190 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-03T23:10:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d93cc85b966597feab8abdd21f38af03 |
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: 2026-07-03T23:10:00.000Z.
First archived: 2026-07-03T23:23:48.478Z. 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 | Custer, MT; Big Horn, MT; Garfield, MT; McCone, MT; Roosevelt, MT; Valley, MT |
| Headline | Severe Thunderstorm Warning issued July 3 at 5:10PM MDT until July 3 at 5:45PM MDT by NWS Billings MT |
| Expires | 2026-07-03T17:45:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d93cc85b966597feab8abdd21f38af031736b78d.001.1","noaa_urn:oid:2.49.0.1.840.0.1a7bfcc0dad1da2ff90934dc7411eaf193d91b28.001.1","noaa_urn:oid:2.49.0.1.840.0.d98cdc671d6519fafbeac9110812a966fa1f2606.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?