Reported by SPC today.
It is the 31st strongest of the 121 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind UNK kt near 1 SSW Castle Shannon, Allegheny, PA. Report of tree down on T line between Washington Junction and Casswell in Bethel Park. Time estimated based on radar. (PBZ)
An estimated 672,246 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 18, 2026 · score 48 · 6.5 km
- August 7, 2026 · score 41 · 7.2 km
- June 26, 2026 · score 48 · 7.4 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 41 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 | Medium |
| Calamity Score (ours) | 41 / 100 |
| Our confidence | 71% |
| Coordinates | 40.3500, -80.0300 |
| Nearest City | Mount Lebanon (2 km) |
| Population Exposed | 672.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T06:16:44.618Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | 1 SSW Castle Shannon |
| County | Allegheny |
| State | PA |
| Comments | Report of tree down on T line between Washington Junction and Casswell in Bethel Park. Time estimated based on radar. (PBZ) |
| Iem TypeSummary | R |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | Dormont |
| Iem County | Allegheny |
| Iem State | PA |
| Iem Wfo | PBZ |
| MergedSources | [{"id":"iem_F_40.250_-80.000_1788484440000","source":"iem","severity":"low","severityValue":25,"timestamp":1788484440000,"latitude":40.25,"longitude":-80},{"id":"iem_R_40.390_-80.030_1788485280000","source":"iem","severity":"low","severityValue":25,"timestamp":1788485280000,"latitude":40.39,"longitude":-80.03}] |
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 near Mount Lebanon?
Calamity.live data shows a weather event with CalamityScore 41/100, near Mount Lebanon (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.