This alert expired on 1 September 2026 at 21:30 UTC. It is kept here as a record.
It is the 6th strongest of the 23 detections recorded within 20 km of this point since 16 April 2026. The last comparable one was on 28 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 1 at 4:51PM EDT until September 1 at 5:30PM EDT by NWS State College PA
An estimated 29,201 people live within 50 km of this point.
Nearby, since 16 April 2026
- August 2, 2026 · score 34 · 15.2 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 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 81% |
| Coordinates | 41.4672, -76.7931 |
| Nearest City | Williamsport (31 km) |
| Population Exposed | 29.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-01T20:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.552ce41e54c96ee04273329e4543ea4e0d9a0ca6.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lycoming, PA; Tioga, PA; Lycoming, PA; Sullivan, PA |
| Headline | Severe Thunderstorm Warning issued September 1 at 4:51PM EDT until September 1 at 5:30PM EDT by NWS State College PA |
| Expires | 2026-09-01T17:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.552ce41e54c96ee04273329e4543ea4e0d9a0ca6.001.1","noaa_urn:oid:2.49.0.1.840.0.5d88c046bb547a8ba8cf3977fb38817d6c7d95b4.001.1"] |
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 10 February 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.