This alert expired on 23 June 2026 at 01:45 UTC. It is kept here as a record.
No stronger detection stands among the 479 recorded within 20 km of this point since 12 March 2026 — 327 others scored the same. Another comparable one was recorded here earlier the same day. 32 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 22 at 6:48PM EDT until June 22 at 9:45PM EDT by NWS Mount Holly NJ
An estimated 3,651,451 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 15, 2026 · score 52 · 2.0 km
- August 5, 2026 · score 52 · 3.1 km
- March 17, 2026 · score 52 · 3.6 km
How we know
Confirmed by 12 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 87 % 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 | 87% |
| Coordinates | 40.1099, -74.9924 |
| Nearest City | Somerton (2 km) |
| Population Exposed | 3.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-22T22:48:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Burlington, NJ; Mercer, NJ; Middlesex, NJ; Monmouth, NJ; Bucks, PA; Burlington, NJ; Philadelphia, PA; Burlington, NJ; Bucks, PA; Montgomery, PA; Philadelphia, PA and 1 more areas |
| Headline | Flash Flood Warning issued June 22 at 6:48PM EDT until June 22 at 9:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-06-22T21:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0019889627bcac0b65cbe970839788492c8cb9a9.001.1","noaa_urn:oid:2.49.0.1.840.0.2d2ef1dfbc896369b9ee5e900e23e985ef2db720.001.1","noaa_urn:oid:2.49.0.1.840.0.a1fdd5e3778a6c7043c2fee42fddfc1d0b6e3ba0.001.1","noaa_urn:oid:2.49.0.1.840.0.82cd29371d1ec5bbd5d040775d4b4c550982097d.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.25 |
| Iem Unit | Inch |
| Iem City | East Greenwich Twp |
| Iem County | Gloucester |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Report of pea sized hail. Time estimated from radar. |
| Google News RssFeed | weather |
| Google News SourceName | FOX 29 Philadelphia |
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 Somerton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.