This alert expired on 1 September 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 17 March 2026 — 5 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 5:50PM EDT until September 1 at 6:30PM EDT by NWS Mount Holly NJ
An estimated 96,954 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 12, 2026 · score 32 · 6.1 km
- September 1, 2026 · score 32 · 21.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 80 % 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) | 32 / 100 |
| Our confidence | 80% |
| Coordinates | 41.2861, -76.4441 |
| Nearest City | Back Mountain (38 km) |
| Population Exposed | 97.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-01T21:50:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.11103b3611c0fd55e4eae5b14f322d876bb03a0c.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carbon, PA; Lehigh, PA; Northampton, PA; Luzerne, PA; Warren, NJ; Monroe, PA; Northampton, PA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued September 1 at 5:50PM EDT until September 1 at 6:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-09-01T18:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.11103b3611c0fd55e4eae5b14f322d876bb03a0c.001.1","noaa_urn:oid:2.49.0.1.840.0.2a92d75a3dde47acf37e728d8404035e46658ff2.001.1","noaa_urn:oid:2.49.0.1.840.0.b50800ab5055e839c8bf56340479547835a4074a.001.1","noaa_urn:oid:2.49.0.1.840.0.aaa744400c8594adfa22b71729a15244ab036eeb.001.1","noaa_urn:oid:2.49.0.1.840.0.dd21d5f14878d45b39a9ea932e085a04435f1994.001.1","noaa_urn:oid:2.49.0.1.840.0.986dfb4cd1fe3f8fecae576207527a497ce0be13.001.1","noaa_urn:oid:2.49.0.1.840.0.37914dc0bb5716564fbae89a6bc8fa81192935d7.001.1"] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 32/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.