This alert expired on 2 September 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 40 recorded within 20 km of this point since 16 March 2026 — 2 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 6:55PM EDT until September 2 at 7:30PM EDT by NWS Buffalo NY
An estimated 370,832 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 18, 2026 · score 67 · 6.1 km
- July 18, 2026 · score 43 · 16.7 km
- September 3, 2026 · score 37 · 17.5 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 67 out of 100, at 90 % 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) | 67 / 100 |
| Our confidence | 90% |
| Coordinates | 43.0300, -78.0744 |
| Nearest City | Batavia (10 km) |
| Population Exposed | 370.8K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-02T22:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7b0b2b3dfddb58ca20bb2c42d59fff7e7a1c99ef.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Genesee, NY; Monroe, NY; Orleans, NY |
| Headline | Tornado Warning issued September 2 at 6:55PM EDT until September 2 at 7:30PM EDT by NWS Buffalo NY |
| Expires | 2026-09-02T19:30:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Portageville |
| Spc County | Livingston |
| Spc State | NY |
| Spc Comments | Tree down on Portageville Road. (BUF) |
| Iem TypeSummary | D |
| Iem City | 1 WNW Portageville |
| Iem County | Wyoming |
| Iem State | NY |
| Iem Wfo | BUF |
| Iem Remark | Tree and wires down on 19A/ Route 436. |
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 near Batavia?
Calamity.live data shows a weather event with CalamityScore 67/100, near Batavia (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.