This alert expired on 10 May 2026 at 00:50 UTC. It is kept here as a record.
It is the 4th strongest of the 78 detections recorded within 20 km of this point since 23 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 9 at 8:40PM EDT until May 9 at 8:45PM EDT by NWS Pittsburgh PA
An estimated 214,833 people live within 50 km of this point.
Nearby, since 23 March 2026
- May 9, 2026 · score 43 · 5.7 km
- June 20, 2026 · score 43 · 9.9 km
- July 10, 2026 · score 43 · 10.9 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 79 % 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 | 79% |
| Coordinates | 41.0936, -80.2364 |
| Nearest City | New Castle (14 km) |
| Population Exposed | 214.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-10T00:40:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c96f0cad23330588726399fd0590e7bb25bd442e.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lawrence, PA; Mercer, PA |
| Headline | Severe Thunderstorm Warning issued May 9 at 8:40PM EDT until May 9 at 8:45PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-09T20:50:00-04:00 |
| SenderName | NWS Pittsburgh 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.
Want to know when something happens near New Castle?
Calamity.live data shows a weather event with CalamityScore 43/100, near New Castle (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.