This alert expired on 3 September 2026 at 00:30 UTC. It is kept here as a record.
No stronger detection stands among the 35 recorded within 20 km of this point since 17 March 2026 — 4 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 7:56PM EDT until September 2 at 8:30PM EDT by NWS State College PA
Nearby, since 17 March 2026
- September 2, 2026 · score 46 · 15.8 km
- July 28, 2026 · score 22 · 19.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 65 % 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 | 65% |
| Coordinates | 42.3476, -77.5912 |
| Nearest City | Elmira (70 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T23:56:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.5eadc1b7f7c62f02a19dc1c1c8ed1899f648468b.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Tioga, PA; Allegany, NY; Livingston, NY; Wyoming, NY; Livingston, NY; Monroe, NY; Wyoming, NY and 1 more areas |
| Headline | Tornado Warning issued September 2 at 7:56PM EDT until September 2 at 8:30PM EDT by NWS State College PA |
| Expires | 2026-09-02T20:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5eadc1b7f7c62f02a19dc1c1c8ed1899f648468b.001.1","noaa_urn:oid:2.49.0.1.840.0.68a4ed8e45a6ce0a3442fb91ff85e70cc628269f.001.1","noaa_urn:oid:2.49.0.1.840.0.952537f21ac23e42a02bda1a38ec29d96e468efc.002.1","noaa_urn:oid:2.49.0.1.840.0.e404dba669ea12ce5bcef00595c2cdd7491c84f2.001.1"] |
| 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. |
| MergedSources | [{"id":"iem_D_42.600_-78.070_1788387600000","source":"iem","severity":"low","severityValue":25,"timestamp":1788387600000,"latitude":42.6,"longitude":-78.07},{"id":"iem_D_42.610_-78.070_1788387540000","source":"iem","severity":"low","severityValue":25,"timestamp":1788387540000,"latitude":42.61,"longitude":-78.07},{"id":"iem_D_42.580_-78.040_1788387900000","source":"iem","severity":"low","severityValue":25,"timestamp":1788387900000,"latitude":42.58,"longitude":-78.04},{"id":"iem_D_42.580_-78.060_1788387660000","source":"iem","severity":"low","severityValue":25,"timestamp":1788387660000,"latitude":42.58,"longitude":-78.06}] |
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.