This alert expired on 5 July 2026 at 02:35 UTC. It is kept here as a record.
It is the 23rd strongest of the 58 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 10:25PM EDT until July 4 at 10:30PM EDT by NWS Mount Holly NJ
An estimated 592,014 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 12, 2026 · score 48 · 6.7 km
- July 6, 2026 · score 52 · 9.5 km
- July 4, 2026 · score 48 · 9.7 km
How we know
Confirmed by 15 independent sources, including NOAA.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 90% |
| Coordinates | 39.5677, -74.7017 |
| Nearest City | Pleasantville (25 km) |
| Population Exposed | 592.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T02:25:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Sussex, DE; Caroline, MD; Atlantic, NJ; Cape May, NJ; Cumberland, NJ; Ocean, NJ; Burlington, NJ; Hunterdon, NJ; Mercer, NJ; Middlesex, NJ; Monmouth, NJ; Somerset, NJ; Bucks, PA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 10:25PM EDT until July 4 at 10:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-04T22:35:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fdc72b3e907abc8d3ced3d1a756c71c03304a36a.001.1","noaa_urn:oid:2.49.0.1.840.0.2b3529328f64f3017fa442112de4727bc58e2757.001.1","noaa_urn:oid:2.49.0.1.840.0.7553479ea7191b531249a9b5181d3390c6ad8eb0.001.1","noaa_urn:oid:2.49.0.1.840.0.a443053d76bbbacff636ebb9babb384a4599f3ba.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 42 |
| Iem Unit | MPH |
| Iem City | 2 NE Sea Isle City |
| Iem County | ANZ453 |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Ludlam Bay mesonet. |
| MergedSources | [{"id":"iem_D_39.920_-74.570_1783216140000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216140000,"latitude":39.92,"longitude":-74.57},{"id":"iem_D_39.780_-74.980_1783215720000","source":"iem","severity":"low","severityValue":25,"timestamp":1783215720000,"latitude":39.78,"longitude":-74.98},{"id":"iem_D_39.870_-74.730_1783215900000","source":"iem","severity":"low","severityValue":25,"timestamp":1783215900000,"latitude":39.87,"longitude":-74.73},{"id":"iem_G_39.150_-74.700_1783217100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783217100000,"latitude":39.15,"longitude":-74.7},{"id":"iem_M_39.500_-74.300_1783217400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783217400000,"latitude":39.5,"longitude":-74.3},{"id":"iem_M_39.230_-74.610_1783216440000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216440000,"latitude":39.23,"longitude":-74.61},{"id":"iem_G_39.590_-74.880_1783214760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783214760000,"latitude":39.59,"longitude":-74.88},{"id":"iem_M_39.150_-74.680_1783216800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216800000,"latitude":39.15,"longitude":-74.68},{"id":"iem_D_39.890_-74.910_1783214940000","source":"iem","severity":"low","severityValue":25,"timestamp":1783214940000,"latitude":39.89,"longitude":-74.91},{"id":"iem_D_39.790_-74.730_1783216020000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216020000,"latitude":39.79,"longitude":-74.73},{"id":"iem_M_39.350_-74.430_1783216740000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216740000,"latitude":39.35,"longitude":-74.43},{"id":"iem_D_39.860_-74.820_1783216020000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216020000,"latitude":39.86,"longitude":-74.82},{"id":"iem_G_39.370_-75.070_1783216140000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216140000,"latitude":39.37,"longitude":-75.07},{"id":"iem_M_39.170_-74.670_1783216320000","source":"iem","severity":"low","severityValue":25,"timestamp":1783216320000,"latitude":39.17,"longitude":-74.67}] |
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 48/100, near Pleasantville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.