Right now
The most recent data we hold from NOAA arrived 7 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 4 km from here.
This alert expired on 10 September 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 49 recorded within 20 km of this point since 15 April 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 40 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued September 9 at 8:26PM EDT until September 9 at 8:45PM EDT by NWS State College PA
Nearby, since 15 April 2026
- July 11, 2026 · score 22 · 17.0 km
- June 14, 2026 · score 46 · 18.1 km
- July 11, 2026 · score 22 · 24.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 59 % 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 | 59% |
| Coordinates | 41.8420, -77.9500 |
| Nearest City | Elmira (98 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-10T00:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.6641b82ba958589a1023e43263c2b0920d862581.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Potter, PA |
| Headline | Tornado Warning issued September 9 at 8:26PM EDT until September 9 at 8:45PM EDT by NWS State College PA |
| Expires | 2026-09-09T20:45:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
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.
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