This alert expired on 3 September 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 37 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 2 at 8:17PM EDT until September 2 at 8:45PM EDT by NWS Buffalo NY
Nearby, since 17 March 2026
- July 6, 2026 · score 22 · 14.5 km
- September 3, 2026 · score 16 · 21.2 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 70 % 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 | High |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 70% |
| Coordinates | 42.3102, -77.8571 |
| Nearest City | Batavia (81 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T00:17:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.3df09e7a94b1c7f0d51e0b6e8bac7e524ef36c2f.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cayuga, NY; Livingston, NY; Ontario, NY; Oswego, NY; Wayne, NY; Wyoming, NY; Cayuga, NY; Seneca, NY; Steuben, NY; Yates, NY; Allegany, NY; Cattaraugus, NY; Chautauqua, NY; Livingston, NY; Wyoming, NY and 2 more areas |
| Headline | Severe Thunderstorm Warning issued September 2 at 8:17PM EDT until September 2 at 8:45PM EDT by NWS Buffalo NY |
| Expires | 2026-09-02T20:45:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3df09e7a94b1c7f0d51e0b6e8bac7e524ef36c2f.002.1","noaa_urn:oid:2.49.0.1.840.0.c7d0fd27c9b2224ddae2dc92237b43050661491c.001.1","noaa_urn:oid:2.49.0.1.840.0.d9e4cbbe46f0b362c6863a10aff3d334f5853748.001.1","noaa_urn:oid:2.49.0.1.840.0.d7f76867756cd759a731e2a241a65ee6fdcc13b0.001.1","noaa_urn:oid:2.49.0.1.840.0.1477117819b995692e9650b71d782ab99c014e04.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 125 |
| Spc Location | Silver Springs |
| Spc County | Wyoming |
| Spc State | NY |
| Spc Comments | Picture of half dollar sized hail from social media. (BUF) |
| Iem TypeSummary | D |
| Iem City | 1 WNW Portageville |
| Iem County | Wyoming |
| Iem State | NY |
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.