This alert expired on 3 September 2026 at 03:30 UTC. It is kept here as a record.
No stronger detection stands among the 59 recorded within 20 km of this point since 31 March 2026 — one other scored the same. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Tornado Warning issued September 2 at 11:15PM EDT until September 2 at 11:30PM EDT by NWS State College PA
Nearby, since 31 March 2026
- September 3, 2026 · score 46 · 2.0 km
- August 8, 2026 · score 22 · 15.9 km
- July 3, 2026 · score 34 · 15.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 67 % 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) | 46 / 100 |
| Our confidence | 67% |
| Coordinates | 41.6500, -78.9750 |
| Nearest City | Jamestown (55 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T03:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.5c719ad947a9ef1a2f5e7d593bd5fb84cd1e14b7.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Elk, PA; McKean, PA; Warren, PA |
| Headline | Tornado Warning issued September 2 at 11:15PM EDT until September 2 at 11:30PM EDT by NWS State College PA |
| Expires | 2026-09-02T23:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 SE Ellicottville |
| Spc County | Cattaraugus |
| Spc State | NY |
| Spc Comments | Tree and wires down blocking Rte. 219. (BUF) |
| MergedSources | [{"id":"spc_wind_41.87_-79.15_1","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.87,"longitude":-79.15},{"id":"spc_wind_41.87_-79.19_2","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.87,"longitude":-79.19},{"id":"spc_wind_41.61_-79.42_6","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.61,"longitude":-79.42},{"id":"spc_wind_41.69_-79.56_9","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.69,"longitude":-79.56},{"id":"spc_wind_41.87_-79.19_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.87,"longitude":-79.19},{"id":"spc_wind_41.29_-78.90_14","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.29,"longitude":-78.9},{"id":"spc_wind_41.19_-78.92_15","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.19,"longitude":-78.92},{"id":"spc_wind_41.33_-78.60_17","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.33,"longitude":-78.6},{"id":"spc_wind_41.11_-78.64_18","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.11,"longitude":-78.64},{"id":"spc_wind_41.11_-78.64_19","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.11,"longitude":-78.64},{"id":"spc_wind_41.17_-78.82_20","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377645,"latitude":41.17,"longitude":-78.82},{"id":"spc_wind_41.50_-79.69_145","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377646,"latitude":41.5,"longitude":-79.69},{"id":"spc_wind_41.43_-79.55_152","source":"spc","severity":"medium","severityValue":45,"timestamp":1788405377646,"latitude":41.43,"longitude":-79.55},{"id":"spc_wind_42.26_-78.66_199","source":"spc","severity":"medium","severityValue":45,"timestamp":1788394020000,"latitude":42.26,"longitude":-78.66}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 46/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.