This alert expired on 3 September 2026 at 05:30 UTC. It is kept here as a record.
No stronger detection stands among the 7 recorded within 20 km of this point since 17 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 12:23AM EDT until September 3 at 1:30AM EDT by NWS State College PA
An estimated 29,201 people live within 50 km of this point.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 82 % 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) | 28 / 100 |
| Our confidence | 82% |
| Coordinates | 41.3992, -77.5225 |
| Nearest City | Williamsport (47 km) |
| Population Exposed | 29.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T04:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.605a2333d608b9643e8895966db811e8ea1de70b.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cameron, PA; Centre, PA; Clearfield, PA; Clinton, PA; Elk, PA; Lycoming, PA; Potter, PA; Sullivan, PA; Tioga, PA |
| Headline | Severe Thunderstorm Warning issued September 3 at 12:23AM EDT until September 3 at 1:30AM EDT by NWS State College PA |
| Expires | 2026-09-03T01:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
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 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.