This alert expired on 2 September 2026 at 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 216 recorded within 20 km of this point since 12 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 1 at 9:21PM EDT until September 1 at 10:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 2,693,565 people live within 50 km of this point.
Nearby, since 12 March 2026
- September 2, 2026 · score 46 · 1.7 km
- March 17, 2026 · score 52 · 3.8 km
- July 6, 2026 · score 52 · 4.2 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 91% |
| Coordinates | 39.5260, -75.1568 |
| Nearest City | Vineland (12 km) |
| Population Exposed | 2.7M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-02T01:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a188bc54e7d8991357ece00429d4b92174f59e53.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cecil, MD; Camden, NJ; Gloucester, NJ; Salem, NJ; Kent, DE; New Castle, DE; Cumberland, NJ; Salem, NJ and 1 more areas |
| Headline | Severe Thunderstorm Warning issued September 1 at 9:21PM EDT until September 1 at 10:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-09-01T22:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a188bc54e7d8991357ece00429d4b92174f59e53.001.1","noaa_urn:oid:2.49.0.1.840.0.a99845a58931b5407ae7eadb8775d18c8c220162.001.1","noaa_urn:oid:2.49.0.1.840.0.37fcf337f3d40eeb3fbf5882105030da307a33d2.001.1","noaa_urn:oid:2.49.0.1.840.0.b0d60b4b07e976f8217bec920d7845de24a163b3.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | Williamstown |
| Spc County | Gloucester |
| Spc State | NJ |
| Spc Comments | Quarter size hail reported in Williamstown. (PHI) |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | Hyde Park |
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.
Want to know when something happens near Vineland?
Calamity.live data shows a weather event with CalamityScore 58/100, near Vineland (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.