This alert expired on 4 September 2026 at 00:30 UTC. It is kept here as a record.
No stronger detection stands among the 42 recorded within 20 km of this point since 11 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 3 at 7:54PM EDT until September 3 at 8:30PM EDT by NWS State College PA
An estimated 65,310 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 12, 2026 · score 39 · 1.9 km
- June 15, 2026 · score 39 · 8.6 km
- March 11, 2026 · score 45 · 8.7 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 63 out of 100, at 91 % 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) | 63 / 100 |
| Our confidence | 91% |
| Coordinates | 40.2676, -78.4377 |
| Nearest City | Altoona (28 km) |
| Population Exposed | 65.3K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T23:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.63a9719e69daad18ceae1dbdb0b2d4302cc536bc.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bedford, PA; Blair, PA; Cambria, PA; Bedford, PA; Cambria, PA; Somerset, PA |
| Headline | Tornado Warning issued September 3 at 7:54PM EDT until September 3 at 8:30PM EDT by NWS State College PA |
| Expires | 2026-09-03T20:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.63a9719e69daad18ceae1dbdb0b2d4302cc536bc.001.1","noaa_urn:oid:2.49.0.1.840.0.99e39298a6cb01ba1d68c20018f71d67c5b62a9d.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 ESE Windber |
| Spc County | Somerset |
| Spc State | PA |
| Spc Comments | Tree down blocking Jay street. (CTP) |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 3 NE Geistown |
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 Altoona?
Calamity.live data shows a weather event with CalamityScore 63/100, near Altoona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.