Right now
The most recent data we hold from SPC arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
28 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by SPC today.
No stronger detection stands among the 41 recorded within 20 km of this point since 7 April 2026 — 25 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Hail 175 in near Avon, Powell, MT. (MSO)
An estimated 32,091 people live within 50 km of this point.
Nearby, since 7 April 2026
- September 7, 2026 · score 40 · 0.0 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 40 out of 100, at 76 % 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) | 40 / 100 |
| Our confidence | 76% |
| Coordinates | 46.6000, -112.5900 |
| Nearest City | Helena (42 km) |
| Population Exposed | 32.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-07T02:23:09.375Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 175 |
| Location | Avon |
| County | Powell |
| State | MT |
| Comments | (MSO) |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | Deer Lodge |
| Iem County | Powell |
| Iem State | MT |
| Iem Wfo | MSO |
| MergedSources | [{"id":"iem_H_46.600_-112.590_1788736800000","source":"iem","severity":"low","severityValue":25,"timestamp":1788736800000,"latitude":46.6,"longitude":-112.59},{"id":"iem_H_46.750_-112.300_1788738420000","source":"iem","severity":"low","severityValue":25,"timestamp":1788738420000,"latitude":46.75,"longitude":-112.3},{"id":"iem_H_46.400_-112.730_1788737400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788737400000,"latitude":46.4,"longitude":-112.73}] |
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?
Calamity.live data shows a weather event with CalamityScore 40/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.