This alert expired on 22 June 2026 at 21:33 UTC. It is kept here as a record.
No stronger detection stands among the 213 recorded within 20 km of this point since 12 March 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 24 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 22 at 5:23PM EDT until June 22 at 5:30PM EDT by NWS Mount Holly NJ
An estimated 3,361,972 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 17, 2026 · score 52 · 3.3 km
- July 11, 2026 · score 52 · 5.5 km
- June 22, 2026 · score 76 · 8.3 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 76 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 | critical |
| Calamity Score (ours) | 76 / 100 |
| Our confidence | 87% |
| Coordinates | 40.0460, -75.5480 |
| Nearest City | Phoenixville (10 km) |
| Population Exposed | 3.4M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-06-22T21:23:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chester, PA; Delaware, PA; Montgomery, PA |
| Headline | Tornado Warning issued June 22 at 5:23PM EDT until June 22 at 5:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-06-22T17:33:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 1 NE Burlington Twp |
| Iem County | Burlington |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | 2 minutes of hail up to 1.5 inch diameter. Time estimated from radar. |
| Google News RssFeed | weather |
| Google News SourceName | FOX 29 Philadelphia |
| MergedSources | [{"id":"iem_H_40.080_-74.810_1782154080000","source":"iem","severity":"low","severityValue":25,"timestamp":1782154080000,"latitude":40.08,"longitude":-74.81},{"id":"iem_H_40.080_-74.820_1782154080000","source":"iem","severity":"low","severityValue":25,"timestamp":1782154080000,"latitude":40.08,"longitude":-74.82},{"id":"iem_D_40.040_-75.030_1782152640000","source":"iem","severity":"low","severityValue":25,"timestamp":1782152640000,"latitude":40.04,"longitude":-75.03},{"id":"iem_H_40.090_-74.810_1782154080000","source":"iem","severity":"low","severityValue":25,"timestamp":1782154080000,"latitude":40.09,"longitude":-74.81},{"id":"gnews_weather_495042_151","source":"google_news","severity":"medium","severityValue":40,"timestamp":1782152732000,"latitude":39.95,"longitude":-75.16},{"id":"gnews_weather_495044_183","source":"google_news","severity":"medium","severityValue":40,"timestamp":1782159000000,"latitude":39.95,"longitude":-75.16}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 76/100, near Phoenixville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.