This alert expired on 4 September 2026 at 06:00 UTC. It is kept here as a record.
It is the 107th strongest of the 134 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 4 at 1:35AM EDT until September 4 at 2:00AM EDT by NWS Mount Holly NJ
An estimated 49,516 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 28, 2026 · score 28 · 6.1 km
- September 2, 2026 · score 28 · 8.9 km
- June 22, 2026 · score 58 · 10.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 82% |
| Coordinates | 38.5477, -75.8479 |
| Nearest City | Salisbury (30 km) |
| Population Exposed | 49.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T05:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.e653d3a3f3b4501b572921fa802ab74018e49691.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Sussex, DE; Essex, VA; Northumberland, VA; Richmond, VA; Westmoreland, VA |
| Headline | Severe Thunderstorm Warning issued September 4 at 1:35AM EDT until September 4 at 2:00AM EDT by NWS Mount Holly NJ |
| Expires | 2026-09-04T02:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e653d3a3f3b4501b572921fa802ab74018e49691.001.1","noaa_urn:oid:2.49.0.1.840.0.a9f42de51f81a5a88806762340041ad1f63b8b0f.002.1","noaa_urn:oid:2.49.0.1.840.0.fcb457a468d654f6f797e8e6feabd21fb412a46d.001.1"] |
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 8 March 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 Salisbury?
Calamity.live data shows a weather event with CalamityScore 28/100, near Salisbury (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.