Right now
The most recent data we hold from NOAA arrived 29 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 22 June 2026 at 22:15 UTC. It is kept here as a record.
It is the 4th strongest of the 166 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 5:22PM EDT until June 22 at 6:15PM EDT by NWS Mount Holly NJ
Urban PEI: 2,140,810 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- August 10, 2026 · score 52 · 5.0 km
- August 6, 2026 · score 52 · 6.4 km
- July 7, 2026 · score 52 · 7.6 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Legacy data-support index | 0.77/1 |
| Coordinates | 39.3659, -76.3419 |
| Nearest City | Edgewood (7 km) |
| Urban exposure index (PEI) | 2.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-22T21:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.12aa119b5e946376d79cd4b4a965e59a |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-22T21:22:00.000Z.
First archived: 2026-06-22T21:26:35.478Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Burlington, NJ; Bucks, PA; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA; Hunterdon, NJ; Mercer, NJ; Bucks, PA; Montgomery, PA; Anne Arundel, MD; Baltimore, MD; Baltimore City, MD and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 5:22PM EDT until June 22 at 6:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-06-22T18:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.12aa119b5e946376d79cd4b4a965e59a76880bad.001.1","noaa_urn:oid:2.49.0.1.840.0.9a66390eed11f5590903cdce4e57a389c22322c3.001.1","noaa_urn:oid:2.49.0.1.840.0.0d77a96a7d834f8fe87cca13564b925d27174d07.001.1","noaa_urn:oid:2.49.0.1.840.0.0b10993a99f41926bf0ff1e1b776ae3d8b0aeb28.001.1","noaa_urn:oid:2.49.0.1.840.0.d3d163505734bc82265a1c6966c32ac7428242bb.001.1"] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 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.
Review the area, threshold and delivery channel in your account.
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