This alert expired on 3 September 2026 at 02:30 UTC. It is kept here as a record.
It is the 6th strongest of the 26 detections recorded within 20 km of this point since 16 April 2026. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 9:50PM EDT until September 2 at 10:30PM EDT by NWS State College PA
An estimated 29,201 people live within 50 km of this point.
Nearby, since 16 April 2026
- September 1, 2026 · score 46 · 17.5 km
- September 1, 2026 · score 58 · 21.9 km
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 80 % 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 | 80% |
| Coordinates | 41.5779, -76.7901 |
| Nearest City | Williamsport (41 km) |
| Population Exposed | 29.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T01:50:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.3b8d9812ea89bcdd1de07b318fd7a9e6ed64771f.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lycoming, PA; Sullivan, PA; Tioga, PA; Centre, PA; Clinton, PA; Lycoming, PA; Union, PA; Broome, NY; Chenango, NY; Cortland, NY; Madison, NY; Tioga, NY and 2 more areas |
| Headline | Severe Thunderstorm Warning issued September 2 at 9:50PM EDT until September 2 at 10:30PM EDT by NWS State College PA |
| Expires | 2026-09-02T22:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3b8d9812ea89bcdd1de07b318fd7a9e6ed64771f.001.1","noaa_urn:oid:2.49.0.1.840.0.f9d1c3e64b85c6eb3d298aacb7dfe9e939e1fc91.001.1","noaa_urn:oid:2.49.0.1.840.0.fbcff3974be3019eb356dd3b55f95c68ed336c08.002.1","noaa_urn:oid:2.49.0.1.840.0.6f4d95fbb02945b68f8d1528090701790db4c814.002.1","noaa_urn:oid:2.49.0.1.840.0.18220f9186a28502bc4b1df010f229ab3255bedc.001.1"] |
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.