This alert expired on 3 September 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 41 recorded within 20 km of this point since 17 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 2 at 7:47PM EDT until September 2 at 8:15PM EDT by NWS Buffalo NY
Nearby, since 17 March 2026
- September 3, 2026 · score 16 · 10.9 km
- September 2, 2026 · score 46 · 15.8 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 70% |
| Coordinates | 42.4891, -77.5756 |
| Nearest City | Henrietta (64 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T23:47:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.952537f21ac23e42a02bda1a38ec29d96e468efc.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Livingston, NY; Monroe, NY; Wyoming, NY; Steuben, NY |
| Headline | Tornado Warning issued September 2 at 7:47PM EDT until September 2 at 8:15PM EDT by NWS Buffalo NY |
| Expires | 2026-09-02T20:15:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.952537f21ac23e42a02bda1a38ec29d96e468efc.002.1","noaa_urn:oid:2.49.0.1.840.0.e404dba669ea12ce5bcef00595c2cdd7491c84f2.001.1"] |
| 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
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.