This alert expired on 5 July 2026 at 23:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 32 detections recorded within 20 km of this point since 17 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 July 5 at 7:35PM EDT until July 5 at 7:45PM EDT by NWS Mount Holly NJ
An estimated 597,587 people live within 50 km of this point.
Nearby, since 17 March 2026
- May 20, 2026 · score 48 · 7.3 km
- July 9, 2026 · score 43 · 17.7 km
- August 10, 2026 · score 43 · 21.5 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, at 77 % 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) | 48 / 100 |
| Our confidence | 77% |
| Coordinates | 39.7832, -76.4675 |
| Nearest City | Bel Air North (27 km) |
| Population Exposed | 597.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T23:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.92c1947eb00ac023763decbc5b35d601 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kent, DE; New Castle, DE; Bucks, PA; Montgomery, PA; Philadelphia, PA; Anne Arundel, MD; Howard, MD; Montgomery, MD; Prince Georges, MD and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 7:35PM EDT until July 5 at 7:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-05T19:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.92c1947eb00ac023763decbc5b35d6014de9ac69.001.1","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.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 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 48/100, near Bel Air North (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.