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 7 September 2026 at 04:30 UTC. It is kept here as a record.
No stronger detection stands among the 13 recorded within 20 km of this point since 13 May 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 6 at 9:27PM MDT until September 6 at 10:30PM MDT by NWS Great Falls MT
Nearby, since 13 May 2026
- June 26, 2026 · score 22 · 7.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 71% |
| Coordinates | 47.7444, -109.2921 |
| Nearest City | Great Falls (153 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-07T03:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.3e555e0d072ce57fe41dc424f1fbebde0ec854e1.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fergus, MT; Blaine, MT; Chouteau, MT |
| Headline | Severe Thunderstorm Warning issued September 6 at 9:27PM MDT until September 6 at 10:30PM MDT by NWS Great Falls MT |
| Expires | 2026-09-06T22:30:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3e555e0d072ce57fe41dc424f1fbebde0ec854e1.001.1","noaa_urn:oid:2.49.0.1.840.0.093083b58ec7784f0473cd8f12bddff0a29bcbcd.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 8 E Lewistown |
| Spc County | Fergus |
| Spc State | MT |
| Spc Comments | Public reported quarter-sized hail at Lewistown Divide. (TFX) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 8 E Lewistown |
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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