This alert expired on 28 August 2026 at 02:45 UTC. It is kept here as a record.
It is the 331st strongest of the 493 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Flood Warning issued August 27 at 5:44PM EDT until August 27 at 10:45PM EDT by NWS Mount Holly NJ
An estimated 3,651,451 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 6, 2026 · score 52 · 1.6 km
- June 22, 2026 · score 52 · 2.7 km
- August 5, 2026 · score 46 · 2.8 km
How we know
Confirmed by 64 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 | 40.0308, -75.0293 |
| Nearest City | Tacony (1 km) |
| Population Exposed | 3.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-27T21:44:00.000Z |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Camden, NJ; Gloucester, NJ; Middlesex, NJ; Somerset, NJ; New Castle, DE; Gloucester, NJ; Salem, NJ; Delaware, PA |
| Headline | Flood Warning issued August 27 at 5:44PM EDT until August 27 at 10:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-27T22:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ab499937c8f198fd05107159492e7d605643dc97.001.1","noaa_urn:oid:2.49.0.1.840.0.8ce20a78ca2955a56744db7f230eac9cf8966b5e.001.1","noaa_urn:oid:2.49.0.1.840.0.22dfb7a78f012a45e6a3baba2082588e47fd25d3.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 NW Harrisonville |
| Spc County | Gloucester |
| Spc State | NJ |
| Spc Comments | Tree down on Harrisonville Road. Time estimated. (PHI) |
| Iem TypeSummary | R |
| Iem Magnitude | 2.13 |
| Iem Unit | Inch |
| Iem City | 2 S Pine Valley |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 Tacony (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.