Right now
The most recent data we hold from NOAA arrived 29 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 4 July 2026 at 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 9 recorded within 20 km of this point since 8 April 2026 — 5 others 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 4:58PM MDT until July 3 at 6:00PM MDT by NWS Billings MT
Nearby, since 8 April 2026
- September 3, 2026 · score 16 · 20.5 km
- May 14, 2026 · score 22 · 22.8 km
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 | 47.2016, -106.5696 |
| Nearest City | Billings (216 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-03T22:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1a7bfcc0dad1da2ff90934dc7411eaf1 |
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: 2026-07-03T22:58:00.000Z.
First archived: 2026-07-03T23:08:11.767Z. 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; Custer, MT; Valley, MT and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 4:58PM MDT until July 3 at 6:00PM MDT by NWS Billings MT |
| Expires | 2026-07-03T18:00:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1a7bfcc0dad1da2ff90934dc7411eaf193d91b28.001.1","noaa_urn:oid:2.49.0.1.840.0.89126cfd8aac9f664e95952bab1b082173bf1def.001.1","noaa_urn:oid:2.49.0.1.840.0.c0ff7515b44064866b5439db5d18d87184819ca3.001.1","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.
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