This alert expired on 7 August 2026 at 22:00 UTC. It is kept here as a record.
It is the 199th strongest of the 265 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 6 August 2026. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 4:56PM EDT until August 7 at 6:00PM EDT by NWS Mount Holly NJ
An estimated 3,413,213 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 9, 2026 · score 52 · 2.6 km
- May 24, 2026 · score 52 · 6.2 km
- July 9, 2026 · score 52 · 7.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 89 % 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) | 46 / 100 |
| Our confidence | 89% |
| Coordinates | 39.9774, -75.4614 |
| Nearest City | Wayne (9 km) |
| Population Exposed | 3.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T20:56:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | New Castle, DE; Chester, PA; Delaware, PA; Anne Arundel, MD; Prince Georges, MD; Hunterdon, NJ; Mercer, NJ; Middlesex, NJ; Monmouth, NJ; Morris, NJ; Somerset, NJ; Sussex, NJ; Bucks, PA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued August 7 at 4:56PM EDT until August 7 at 6:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-07T18:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e5c5cc44d6f65fbbf88646db0828933cf5763d81.001.1","noaa_urn:oid:2.49.0.1.840.0.118347ab806d0775299b065ed8527fa5be6894a0.001.1","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","noaa_urn:oid:2.49.0.1.840.0.ef017b27292650bdc43f90e32fe11cc09acb70ba.001.1","noaa_urn:oid:2.49.0.1.840.0.fd2d42c556146a15f471d67795e9e8c449056790.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 SSW Akron |
| Iem County | Lancaster |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Wires down in the vicinity of Oregon Pike and Newport Road. |
| MergedSources | [{"id":"iem_F_40.120_-76.210_1786131900000","source":"iem","severity":"low","severityValue":25,"timestamp":1786131900000,"latitude":40.12,"longitude":-76.21},{"id":"iem_D_40.130_-76.220_1786128840000","source":"iem","severity":"low","severityValue":25,"timestamp":1786128840000,"latitude":40.13,"longitude":-76.22}] |
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 46/100, near Wayne (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.