This alert expired on 17 March 2026 at 03:38 UTC. It is kept here as a record.
No stronger detection stands among the 160 recorded within 20 km of this point since 12 March 2026 — 95 others scored the same. Another comparable one was recorded here earlier the same day. 82 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 11:28PM EDT until March 16 at 11:30PM EDT by NWS Mount Holly NJ
An estimated 2,724,571 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 27, 2026 · score 52 · 6.1 km
- July 27, 2026 · score 52 · 9.5 km
- March 12, 2026 · score 52 · 9.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 83 % 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 | 83% |
| Coordinates | 39.5798, -74.9178 |
| Nearest City | Vineland (14 km) |
| Population Exposed | 2.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T03:28:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.41c9465e90bb2ca7ce324a3f29290fab |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Burlington, NJ; Camden, NJ; Cumberland, NJ; Gloucester, NJ; Salem, NJ; Atlantic, NJ; Cape May, NJ; Cumberland, NJ; Bucks, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued March 16 at 11:28PM EDT until March 16 at 11:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-16T23:38:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.41c9465e90bb2ca7ce324a3f29290fab887da4a3.001.1","noaa_urn:oid:2.49.0.1.840.0.315518aa50f29d48f5358babe05d8e37c7304ac3.002.1","noaa_urn:oid:2.49.0.1.840.0.ab4584a2ea1dca72bf9429fc711025115b027a39.001.1","noaa_urn:oid:2.49.0.1.840.0.0405167c612580a03fb49a25159e2eba31736708.001.1","noaa_urn:oid:2.49.0.1.840.0.6341bc5191445128938f1f6c6f3d2c1de8107dc8.001.1","noaa_urn:oid:2.49.0.1.840.0.eca2c2cbaa1b9afb4d5d6d1da59444a7e1373d36.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Holiday Hills |
| Spc County | New Castle |
| Spc State | DE |
| Spc Comments | Tree down into a house. Time estimated from radar. (PHI) |
| MergedSources | [{"id":"spc_wind_39.82_-75.51_266","source":"spc","severity":"medium","severityValue":45,"timestamp":1773715200000,"latitude":39.82,"longitude":-75.51}] |
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 Vineland (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.