This alert expired on 12 March 2026 at 01:47 UTC. It is kept here as a record.
It is the 22nd strongest of the 55 detections recorded within 20 km of this point since 12 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 11 at 9:37PM EDT until March 11 at 9:45PM EDT by NWS Mount Holly NJ
An estimated 566,983 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 4, 2026 · score 48 · 3.2 km
- July 5, 2026 · score 48 · 6.7 km
- July 6, 2026 · score 52 · 11.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 84 % 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) | 48 / 100 |
| Our confidence | 84% |
| Coordinates | 39.6031, -74.6383 |
| Nearest City | Pleasantville (26 km) |
| Population Exposed | 567.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-12T01:37:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Atlantic, NJ; Burlington, NJ; Camden, NJ; Gloucester, NJ; Ocean, NJ; Atlantic, NJ; Cumberland, NJ |
| Headline | Severe Thunderstorm Warning issued March 11 at 9:37PM EDT until March 11 at 9:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-11T21:47:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b4b67a38bfd4b8d8617b4260866e59a0267144eb.001.1","noaa_urn:oid:2.49.0.1.840.0.7c136d5a580544165794fbc951fd6e77eee6e421.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 54 |
| Iem Unit | MPH |
| Iem City | 2 SSE Washington Twp |
| Iem County | Gloucester |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | CWOP station DW9082 Washington Township. |
| MergedSources | [{"id":"iem_G_39.720_-75.060_1773277200000","source":"iem","severity":"low","severityValue":25,"timestamp":1773277200000,"latitude":39.72,"longitude":-75.06}] |
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 48/100, near Pleasantville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.