Right now
The most recent data we hold from NOAA arrived 12 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 March 2026 at 03:00 UTC. It is kept here as a record.
It is the 8th strongest of the 83 detections recorded within 20 km of this point since 17 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 10:07PM EDT until March 16 at 11:00PM EDT by NWS Mount Holly NJ
An estimated 49,516 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 22, 2026 · score 58 · 7.2 km
- July 21, 2026 · score 28 · 11.5 km
- June 22, 2026 · score 58 · 17.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 80% |
| Coordinates | 38.4318, -75.9818 |
| Nearest City | Salisbury (34 km) |
| Population Exposed | 49.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T02:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.27cde2316d7713ca964493d28eb8b8bc |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | New Castle, DE; Kent, MD; Lancaster, PA; Berks, PA; Chester, PA; Montgomery, PA and 5 more areas |
| Headline | Severe Thunderstorm Warning issued March 16 at 10:07PM EDT until March 16 at 11:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-16T23:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.27cde2316d7713ca964493d28eb8b8bc4f6d9f97.001.1","noaa_urn:oid:2.49.0.1.840.0.0cf851d3fc8e90d858c09db5990a3453e28009f6.001.1","noaa_urn:oid:2.49.0.1.840.0.140f9e1a5ed1b6954232c428264921ebed8a9a0f.001.1","noaa_urn:oid:2.49.0.1.840.0.94cdb5d93f54a5678c55acc4cfb55a66f2ed8304.001.1","noaa_urn:oid:2.49.0.1.840.0.8acf42f3c561725a6ed1b1e7ceabd8fdd4484fd8.001.1","noaa_urn:oid:2.49.0.1.840.0.55cff1ac41adeb580e872a536bd4f53dcd92c3b5.002.1","noaa_urn:oid:2.49.0.1.840.0.89644798b2d8c92e6487fb46968e1b00ba27e203.001.1","noaa_urn:oid:2.49.0.1.840.0.abca594f2c442f596fdd5fa2f9bb1f050565623d.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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.