Severe Weather near Upper Saint Clair
This alert expired on 28 August 2026 at 00:30 UTC. It is kept here as a record.
It is the 18th strongest of the 90 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 27 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 27 at 8:04PM EDT until August 27 at 8:30PM EDT by NWS Pittsburgh PA
An estimated 690,465 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 27, 2026 · score 41 · 4.9 km
- April 1, 2026 · score 48 · 9.2 km
- August 7, 2026 · score 41 · 10.2 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 41 out of 100, at 90 % 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) | 41 / 100 |
| Our confidence | 90% |
| Coordinates | 40.3729, -80.1486 |
| Nearest City | Upper Saint Clair (7 km) |
| Population Exposed | 690.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-28T00:04:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6303c679909d6948c659a92027a53d396c426a77.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allegheny, PA |
| Headline | Severe Thunderstorm Warning issued August 27 at 8:04PM EDT until August 27 at 8:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-08-27T20:30:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 S Jeannette |
| Spc County | Westmoreland |
| Spc State | PA |
| Spc Comments | Tree down blocking both lanes of the road. Time estimated via radar. (PBZ) |
| MergedSources | [{"id":"spc_wind_40.31_-79.71_39","source":"spc","severity":"medium","severityValue":45,"timestamp":1787875557622,"latitude":40.31,"longitude":-79.71},{"id":"spc_wind_40.29_-79.67_43","source":"spc","severity":"medium","severityValue":45,"timestamp":1787875557622,"latitude":40.29,"longitude":-79.67},{"id":"spc_wind_40.31_-79.71_44","source":"spc","severity":"medium","severityValue":45,"timestamp":1787875557622,"latitude":40.31,"longitude":-79.71},{"id":"spc_wind_40.30_-79.61_46","source":"spc","severity":"medium","severityValue":45,"timestamp":1787875557622,"latitude":40.3,"longitude":-79.61}] |
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 Upper Saint Clair?
Calamity.live data shows a weather event with CalamityScore 41/100, near Upper Saint Clair (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.