This alert expired on 12 March 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 11 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 11 at 7:59PM EDT until March 11 at 8:15PM EDT by NWS State College PA
An estimated 65,310 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 11, 2026 · score 45 · 6.2 km
- March 12, 2026 · score 39 · 7.1 km
- June 11, 2026 · score 32 · 8.5 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 45 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 45 / 100 |
| Our confidence | 88% |
| Coordinates | 40.3100, -78.5245 |
| Nearest City | Altoona (26 km) |
| Population Exposed | 65.3K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-11T23:59:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bedford, PA; Blair, PA; Huntingdon, PA |
| Headline | Severe Thunderstorm Warning issued March 11 at 7:59PM EDT until March 11 at 8:15PM EDT by NWS State College PA |
| Expires | 2026-03-11T20:15:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 5 ESE Clymer |
| Spc County | Indiana |
| Spc State | PA |
| Spc Comments | Image shared with us on facebook with an estimated measurement. (PBZ) |
| MergedSources | [{"id":"spc_wind_40.20_-78.87_73","source":"spc","severity":"medium","severityValue":45,"timestamp":1773274301875,"latitude":40.2,"longitude":-78.87},{"id":"spc_wind_40.27_-78.46_78","source":"spc","severity":"medium","severityValue":45,"timestamp":1773274301875,"latitude":40.27,"longitude":-78.46},{"id":"spc_wind_40.30_-78.32_80","source":"spc","severity":"medium","severityValue":45,"timestamp":1773274301875,"latitude":40.3,"longitude":-78.32},{"id":"spc_wind_40.32_-78.83_111","source":"spc","severity":"medium","severityValue":45,"timestamp":1773274301876,"latitude":40.32,"longitude":-78.83},{"id":"spc_wind_40.32_-78.83_112","source":"spc","severity":"medium","severityValue":45,"timestamp":1773274301876,"latitude":40.32,"longitude":-78.83},{"id":"spc_hail_40.64_-78.94_117","source":"spc","severity":"high","severityValue":65,"timestamp":1773274301876,"latitude":40.64,"longitude":-78.94}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 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.
Calamity.live data shows a weather event with CalamityScore 45/100, near Altoona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.