This alert expired on 5 July 2026 at 02:15 UTC. It is kept here as a record.
It is the 33rd strongest of the 61 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 10:06PM EDT until July 4 at 10:15PM EDT by NWS Mount Holly NJ
An estimated 419,792 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 17, 2026 · score 43 · 3.1 km
- July 10, 2026 · score 43 · 7.4 km
- July 9, 2026 · score 43 · 7.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 39.4200, -74.9462 |
| Nearest City | South Vineland (8 km) |
| Population Exposed | 419.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T02:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d269eeb28e013ca0ace79c329960d9f5 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Atlantic, NJ; Burlington, NJ; Camden, NJ; Cumberland, NJ; Gloucester, NJ; Salem, NJ; Atlantic, NJ; Burlington, NJ; Monmouth, NJ; Ocean, NJ; Sussex, DE; Caroline, MD and 3 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 10:06PM EDT until July 4 at 10:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-04T22:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d269eeb28e013ca0ace79c329960d9f56892072b.001.1","noaa_urn:oid:2.49.0.1.840.0.a443053d76bbbacff636ebb9babb384a4599f3ba.001.1","noaa_urn:oid:2.49.0.1.840.0.9b5f3ef1947654b747f2ebe7e4e4540608408e24.001.1","noaa_urn:oid:2.49.0.1.840.0.6cfa2d498dbe0cbb1e151b0e67cae551a021e578.001.1","noaa_urn:oid:2.49.0.1.840.0.916e4d8fc823b4b72dd27d1a13a837748a9a08c9.002.1","noaa_urn:oid:2.49.0.1.840.0.eaba08f6af603ffd72866b53d0a1f50de3dded45.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | Fortescue |
| Iem County | Cumberland |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | NJNET Fortescue station measured a 50 kt wind gust. |
| MergedSources | [{"id":"iem_G_39.590_-74.880_1783214760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783214760000,"latitude":39.59,"longitude":-74.88},{"id":"iem_G_39.240_-75.180_1783215000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783215000000,"latitude":39.24,"longitude":-75.18}] |
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 43/100, near South Vineland (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.