This alert expired on 14 May 2026 at 00:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 75 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 17 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 8:20PM EDT until May 13 at 8:45PM EDT by NWS Mount Holly NJ
An estimated 113,413 people live within 50 km of this point.
Nearby, since 12 March 2026
- May 20, 2026 · score 43 · 12.3 km
- August 27, 2026 · score 37 · 12.8 km
- August 27, 2026 · score 43 · 17.9 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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 | 91% |
| Coordinates | 40.4957, -76.1671 |
| Nearest City | Reading (27 km) |
| Population Exposed | 113.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-14T00:20:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Berks, PA |
| Headline | Severe Thunderstorm Warning issued May 13 at 8:20PM EDT until May 13 at 8:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-05-13T20:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 1 ENE Lickdale |
| Iem County | Lebanon |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Tree Down. |
| MergedSources | [{"id":"iem_D_40.250_-76.860_1778715600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778715600000,"latitude":40.25,"longitude":-76.86},{"id":"iem_D_40.470_-76.460_1778717400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778717400000,"latitude":40.47,"longitude":-76.46}] |
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 Reading (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.