Severe Weather near Murrysville
This alert expired on 3 September 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 119 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 3 at 6:42PM EDT until September 3 at 7:00PM EDT by NWS Pittsburgh PA
An estimated 606,260 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 18, 2026 · score 48 · 3.3 km
- June 14, 2026 · score 72 · 13.4 km
- June 6, 2026 · score 43 · 15.1 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 72 out of 100, at 91 % 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 | Critical |
| Calamity Score (ours) | 72 / 100 |
| Our confidence | 91% |
| Coordinates | 40.3680, -79.4660 |
| Nearest City | Murrysville (21 km) |
| Population Exposed | 606.3K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-09-03T22:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c16ce9b304a68a58915f55d3264f39a996079007.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Westmoreland, PA |
| Headline | Tornado Warning issued September 3 at 6:42PM EDT until September 3 at 7:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-03T19:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 4 W North Washington |
| Spc County | Westmoreland |
| Spc State | PA |
| Spc Comments | There were trees reported down over Whitten Hollow road. (PBZ) |
| Iem TypeSummary | D |
| Iem City | 4 W North Washington |
| Iem County | Westmoreland |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | There were trees reported down over Whitten Hollow road. |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Murrysville?
Calamity.live data shows a weather event with CalamityScore 72/100, near Murrysville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.