This alert expired on 11 July 2026 at 19:30 UTC. It is kept here as a record.
No stronger detection stands among the 292 recorded within 20 km of this point since 12 March 2026 — 178 others scored the same. The last comparable one was on 9 July 2026. 45 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 11 at 2:44PM EDT until July 11 at 3:30PM EDT by NWS Mount Holly NJ
An estimated 3,582,654 people live within 50 km of this point.
Nearby, since 12 March 2026
- May 20, 2026 · score 52 · 2.4 km
- July 11, 2026 · score 52 · 3.5 km
- March 17, 2026 · score 52 · 3.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 80 % 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 39.9820, -75.2560 |
| Nearest City | Overbrook (2 km) |
| Population Exposed | 3.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-11T18:44:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Camden, NJ; Gloucester, NJ; Delaware, PA; Montgomery, PA; Philadelphia, PA |
| Headline | Severe Thunderstorm Warning issued July 11 at 2:44PM EDT until July 11 at 3:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-11T15:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| 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 52/100, near Overbrook (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.