This alert expired on 10 August 2026 at 13:00 UTC. It is kept here as a record.
It is the 4th strongest of the 113 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 8 August 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 10 at 8:08AM EDT until August 10 at 9:00AM EDT by NWS State College PA
An estimated 154,348 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 19, 2026 · score 43 · 3.8 km
- May 14, 2026 · score 43 · 3.8 km
- May 13, 2026 · score 43 · 3.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 40.1631, -76.8931 |
| Nearest City | Harrisburg (12 km) |
| Population Exposed | 154.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T12:08:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, PA; Cumberland, PA; Dauphin, PA; Perry, PA; York, PA |
| Headline | Severe Thunderstorm Warning issued August 10 at 8:08AM EDT until August 10 at 9:00AM EDT by NWS State College PA |
| Expires | 2026-08-10T09:00:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
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 43/100, near Harrisburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.