This alert expired on 7 August 2026 at 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 237 recorded within 20 km of this point since 12 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 29 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 4:50PM EDT until August 7 at 5:45PM EDT by NWS Mount Holly NJ
An estimated 24,161,737 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 27, 2026 · score 52 · 6.6 km
- July 3, 2026 · score 52 · 7.2 km
- August 7, 2026 · score 66 · 8.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 66 out of 100, at 84 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 66 / 100 |
| Our confidence | 84% |
| Coordinates | 40.6247, -74.4036 |
| Nearest City | Plainfield (1 km) |
| Population Exposed | 24.2M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-08-07T20:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e2814608af18064301d159e677f3977e |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hunterdon, NJ; Mercer, NJ; Middlesex, NJ; Monmouth, NJ; Morris, NJ; Somerset, NJ; Sussex, NJ; Bucks, PA; Hunterdon, NJ; Morris, NJ; Sussex, NJ; Warren, NJ; Bucks, PA; Northampton, PA; Monmouth, NJ |
| Headline | Severe Thunderstorm Warning issued August 7 at 4:50PM EDT until August 7 at 5:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-07T17:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e2814608af18064301d159e677f3977ee8655c1a.001.1","noaa_urn:oid:2.49.0.1.840.0.2496acca7163bae20330bb4eccdd928bbcf72b6c.002.1","noaa_urn:oid:2.49.0.1.840.0.30db9315da1f54374c0610734ac17a3ba19d37bc.001.1"] |
| Ogimet StationId | 72530 |
| Ogimet WindSpeed | 84 |
| Ogimet WindUnit | knots |
| Ogimet Temperature | 27.8 |
| Ogimet TemperatureUnit | C |
| Ogimet RawSynop | 08,07,17,51,AAXX 07184 72530 32566 4//06 10278 20200 39934 40168 58004 91751 333 10283 20211 555 90718= |
| MergedSources | [{"id":"ogimet_72530_1786134336585","source":"ogimet","severity":"critical","severityValue":90,"timestamp":1786134336585,"latitude":40.8,"longitude":-74}] |
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 66/100, near Plainfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.