Right now
The most recent data we hold from NOAA arrived 1 minute 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 6 July 2026 at 00:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 48 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 7:33PM EDT until July 5 at 8:30PM EDT by NWS Mount Holly NJ
Urban PEI: 597,587 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- July 5, 2026 · score 48 · 0.0 km
- May 20, 2026 · score 48 · 7.3 km
- September 2, 2026 · score 37 · 9.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 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) | 48 / 100 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 39.7832, -76.4675 |
| Nearest City | Bel Air North (27 km) |
| Urban exposure index (PEI) | 597.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T23:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1c9bb939754306e07e36e119fec73795 |
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: 2026-07-05T23:33:00.000Z.
First archived: 2026-07-05T23:35:48.756Z. 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 | Bucks, PA; Montgomery, PA; Philadelphia, PA; Anne Arundel, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Adams, PA; Cumberland, PA; Dauphin, PA; Lancaster, PA; Lebanon, PA; Perry, PA; York, PA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 7:33PM EDT until July 5 at 8:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-05T20:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1c9bb939754306e07e36e119fec7379537c64b64.001.1","noaa_urn:oid:2.49.0.1.840.0.cc4468ea4a58b346c4932adfab97ed46cb677e31.001.1","noaa_urn:oid:2.49.0.1.840.0.f6971072d50bd7d2f7e7c25d4b6fb7efa70acf1e.001.1","noaa_urn:oid:2.49.0.1.840.0.9fda2e8ee3b6ca1e99ddd0452a904f2513233462.001.1","noaa_urn:oid:2.49.0.1.840.0.ad99424ad1b21fea81768d99a6ee38d190d7fadb.001.1","noaa_urn:oid:2.49.0.1.840.0.e51ee07e2962d54e751ed0c00184cedbabfdd788.001.1","noaa_urn:oid:2.49.0.1.840.0.2a97c90608a8e39a60544c599acbbe8272d00371.001.1"] |
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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