This alert expired on 9 July 2026 at 22:00 UTC. It is kept here as a record.
It is the 5th strongest of the 123 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 9 at 3:11PM EDT until July 9 at 6:00PM EDT by NWS Mount Holly NJ
An estimated 395,244 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 19, 2026 · score 43 · 4.2 km
- August 31, 2026 · score 43 · 12.7 km
- August 28, 2026 · score 67 · 16.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 39.9572, -76.2006 |
| Nearest City | Lancaster (13 km) |
| Population Exposed | 395.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-09T19:11:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Camden, NJ; Gloucester, NJ; Delaware, PA; Philadelphia, PA; Burlington, NJ; Bucks, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA; Lancaster, PA and 8 more areas |
| Headline | Flash Flood Warning issued July 9 at 3:11PM EDT until July 9 at 6:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-09T18:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0fe1dcee18ea3f0a2f78a72a07f8a9db7b51b0e4.001.1","noaa_urn:oid:2.49.0.1.840.0.f9a525b229b666a10d7b13e5bb4a8b2450c70fca.001.1","noaa_urn:oid:2.49.0.1.840.0.f38e79b7d5d71371c4f3daddc043a1d082d14763.001.1","noaa_urn:oid:2.49.0.1.840.0.547bfaa41e0ff5512789da715f3ae950f1622f64.001.1","noaa_urn:oid:2.49.0.1.840.0.8cf1e5c4a97e3f532eaac47cdd96bc21a0b9ee65.001.1","noaa_urn:oid:2.49.0.1.840.0.569cab232fcdeba90917c8bc7ed2d890b2794781.001.1","noaa_urn:oid:2.49.0.1.840.0.2dc7483075e1f847fbd98dcd35fa9e0167a9be74.001.1","noaa_urn:oid:2.49.0.1.840.0.529c42cfa47685ae827fb221073d89967c3880b4.001.1","noaa_urn:oid:2.49.0.1.840.0.6ca45032e585cc4faea6c40b32e288ab31711fc0.001.1","noaa_urn:oid:2.49.0.1.840.0.6ed9bef4e9d60f18d2ec4d7dc8e176d37ac52ab6.001.1","noaa_urn:oid:2.49.0.1.840.0.c542b071c386172fc75aab4f230fc6fd8e267696.001.1"] |
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 43/100, near Lancaster (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.