This alert expired on 6 June 2026 at 23:15 UTC. It is kept here as a record.
It is the 4th strongest of the 101 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 6 at 6:55PM EDT until June 6 at 7:15PM EDT by NWS Mount Holly NJ
An estimated 3,696,515 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 12, 2026 · score 46 · 1.6 km
- August 6, 2026 · score 58 · 4.1 km
- June 12, 2026 · score 46 · 4.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 79 % 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 | 79% |
| Coordinates | 40.6983, -74.6585 |
| Nearest City | Basking Ridge (9 km) |
| Population Exposed | 3.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T22:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d8d983d19d47b58a96bde540ba34c9bd |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | New Castle, DE; Hunterdon, NJ; Mercer, NJ; Somerset, NJ; Berks, PA; Bucks, PA; Chester, PA; Delaware, PA; Lehigh, PA; Montgomery, PA; Philadelphia, PA; Bergen, NJ; Essex, NJ; Hudson, NJ; Passaic, NJ; Union, NJ; Orange, NY; Richmond, NY; Rockland, NY; Anne Arundel, MD; Baltimore, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Baltimore City, MD and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 6 at 6:55PM EDT until June 6 at 7:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-06-06T19:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d8d983d19d47b58a96bde540ba34c9bd44ba8f79.001.1","noaa_urn:oid:2.49.0.1.840.0.c816cea5b908322d5368ce11b650581411fc03ed.001.1","noaa_urn:oid:2.49.0.1.840.0.cf5c9d8f4c4940ab0d7d35c1cefe7b3574911b04.001.1","noaa_urn:oid:2.49.0.1.840.0.8dc83894cb8a9a7ba646bbe945028d3bf69159d2.001.1","noaa_urn:oid:2.49.0.1.840.0.1b673f0a420e3a80107a2ab68075d4945b0c42c5.002.1","noaa_urn:oid:2.49.0.1.840.0.56eed5a91cc6d93da13c61323a620d4376a739de.002.1"] |
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 Basking Ridge (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.