This alert expired on 2 September 2026 at 13:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 9 detections recorded within 20 km of this point since 3 July 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 9:36AM EDT until September 2 at 9:45AM EDT by NWS Buffalo NY
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 61 % 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) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 41.8943, -78.0807 |
| Nearest City | Jamestown (98 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T13:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7e0a87516fbeb9b55f9f25d1862e7eccac752704.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Livingston, NY; Ontario, NY; Cameron, PA; Centre, PA; Clearfield, PA; Clinton, PA; Elk, PA; Cayuga, NY; Oswego, NY; Wayne, NY and 4 more areas |
| Headline | Severe Thunderstorm Warning issued September 2 at 9:36AM EDT until September 2 at 9:45AM EDT by NWS Buffalo NY |
| Expires | 2026-09-02T09:45:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7e0a87516fbeb9b55f9f25d1862e7eccac752704.002.1","noaa_urn:oid:2.49.0.1.840.0.01ba22300bfe40f0285f874b6854227dcc51830c.001.1","noaa_urn:oid:2.49.0.1.840.0.dbfeb746caa1d52c6ae08bdfd429f9f5d705d304.001.1","noaa_urn:oid:2.49.0.1.840.0.70b59402e9ff0eeb19d1d43bee6d50e4ab2a3964.001.1","noaa_urn:oid:2.49.0.1.840.0.a3762d98573583a0a962831513b916ad9659cf05.001.1","noaa_urn:oid:2.49.0.1.840.0.5a14532c051cec5089931bc35a283d4fbfcf7748.001.1","noaa_urn:oid:2.49.0.1.840.0.2b3e0a06c10ff10a4d214219d5bcf637c35a7803.001.1"] |
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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.