Right now
The most recent data we hold from NOAA arrived 3 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 May 2026 at 01:15 UTC. It is kept here as a record.
No stronger detection stands among the 26 recorded within 20 km of this point since 24 April 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 26 at 6:14PM MDT until May 26 at 7:15PM MDT by NWS Great Falls MT
An estimated 66,281 people live within 50 km of this point.
Nearby, since 24 April 2026
- May 13, 2026 · score 39 · 5.7 km
- May 27, 2026 · score 39 · 15.6 km
- May 13, 2026 · score 34 · 19.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 46.2889, -112.0500 |
| Nearest City | Helena (33 km) |
| Population Exposed | 66.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T00:14:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3184d8e61bfa9cfda095759d133402e18894119f.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Broadwater, MT; Jefferson, MT |
| Headline | Severe Thunderstorm Warning issued May 26 at 6:14PM MDT until May 26 at 7:15PM MDT by NWS Great Falls MT |
| Expires | 2026-05-26T19:15:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
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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