This alert expired on 10 July 2026 at 00:30 UTC. It is kept here as a record.
No stronger detection stands among the 232 recorded within 20 km of this point since 11 March 2026 — 137 others scored the same. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 9 at 7:42PM EDT until July 9 at 8:30PM EDT by NWS Mount Holly NJ
An estimated 3,361,784 people live within 50 km of this point.
Nearby, since 11 March 2026
- July 10, 2026 · score 52 · 0.0 km
- July 6, 2026 · score 52 · 4.1 km
- August 8, 2026 · score 52 · 6.5 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 | 39.6329, -75.1875 |
| Nearest City | Glassboro (10 km) |
| Population Exposed | 3.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-09T23:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.bdfce29e3a6cd78f18e96463d373f34a |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | New Castle, DE; Chester, PA; Delaware, PA; Atlantic, NJ; Cape May, NJ; Cumberland, NJ; Burlington, NJ; Camden, NJ; Gloucester, NJ |
| Headline | Flash Flood Warning issued July 9 at 7:42PM EDT until July 9 at 8:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-09T20:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bdfce29e3a6cd78f18e96463d373f34a698a732f.001.1","noaa_urn:oid:2.49.0.1.840.0.eb4c62c7065969f63d7276c7c37db68e1f0dc984.001.1","noaa_urn:oid:2.49.0.1.840.0.33d3bd27053bff2717adb4826d64d1752587530e.001.1"] |
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 52/100, near Glassboro (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.