This alert expired on 4 September 2026 at 00:30 UTC. It is kept here as a record.
It is the 13th strongest of the 174 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 3 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 8:01PM EDT until September 3 at 8:30PM EDT by NWS State College PA
An estimated 605,523 people live within 50 km of this point.
Nearby, since 11 March 2026
- September 3, 2026 · score 54 · 1.8 km
- July 4, 2026 · score 48 · 4.1 km
- September 4, 2026 · score 54 · 5.6 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 54 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 | High |
| Calamity Score (ours) | 54 / 100 |
| Our confidence | 91% |
| Coordinates | 40.2091, -79.7210 |
| Nearest City | McKeesport (20 km) |
| Population Exposed | 605.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-04T00:01:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d15a3524a0c1c942fa5e4ff2e17e62f18d677320.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bedford, PA; Blair, PA; Cambria, PA; Fulton, PA; Huntingdon, PA; Somerset, PA; Belmont, OH; Carroll, OH; Harrison, OH; Jefferson, OH; Tuscarawas, OH; Washington, PA; Brooke, WV; Hancock, WV; Marshall, WV; Ohio, WV |
| Headline | Severe Thunderstorm Warning issued September 3 at 8:01PM EDT until September 3 at 8:30PM EDT by NWS State College PA |
| Expires | 2026-09-03T20:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d15a3524a0c1c942fa5e4ff2e17e62f18d677320.001.1","noaa_urn:oid:2.49.0.1.840.0.261e94339d8072d901b158fed77c98681630a00f.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 150 |
| Spc Location | 1 SW Braddock |
| Spc County | Allegheny |
| Spc State | PA |
| Spc Comments | (PBZ) |
| Iem TypeSummary | D |
| Iem City | 2 SSW Jennerstown |
| Iem County | Somerset |
| Iem State | PA |
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 McKeesport?
Calamity.live data shows a weather event with CalamityScore 54/100, near McKeesport (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.