Right now
The most recent data we hold from NOAA arrived 14 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 13 May 2026 at 23:45 UTC. It is kept here as a record.
It is the 27th strongest of the 52 detections recorded within 20 km of this point since 14 March 2026. The last comparable one was on 20 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 4:08PM MDT until May 13 at 5:45PM MDT by NWS Great Falls MT
Nearby, since 14 March 2026
- July 8, 2026 · score 22 · 12.6 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, at 60 % 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) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 47.2691, -109.7981 |
| Nearest City | Great Falls (116 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-13T22:08:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.16df71dda2cd4bb249e7ac75d599fad8 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Blaine, MT; Chouteau, MT; Fergus, MT; Hill, MT; Liberty, MT; Blaine, MT; Chouteau, MT; Fergus, MT; Hill, MT; Judith Basin, MT; Liberty, MT; Park, MT; Stillwater, MT; Sweet Grass, MT |
| Headline | Severe Thunderstorm Warning issued May 13 at 4:08PM MDT until May 13 at 5:45PM MDT by NWS Great Falls MT |
| Expires | 2026-05-13T17:45:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.16df71dda2cd4bb249e7ac75d599fad8b4cddcaa.001.1","noaa_urn:oid:2.49.0.1.840.0.496beb509a0c678e9618fd787755afb5075f4cc8.002.1","noaa_urn:oid:2.49.0.1.840.0.eb4bdb63259df0e8f5b334fbc9b84d74fd938db5.001.1"] |
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.
Want to know when something happens in this area?