This alert expired on 2 September 2026 at 17:46 UTC. It is kept here as a record.
It is the 83rd strongest of the 184 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 1:36PM EDT until September 2 at 1:45PM EDT by NWS Mount Holly NJ
An estimated 2,234,799 people live within 50 km of this point.
Nearby, since 12 March 2026
- August 6, 2026 · score 52 · 2.4 km
- August 10, 2026 · score 52 · 5.5 km
- August 2, 2026 · score 58 · 6.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 92 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 92% |
| Coordinates | 39.3368, -76.3729 |
| Nearest City | Middle River (6 km) |
| Population Exposed | 2.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T17:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ed2c3254f318208138a9ad532801fa240f5d6aae.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chester, PA; Kent, DE; New Castle, DE; Cecil, MD and 3 more areas |
| Headline | Severe Thunderstorm Warning issued September 2 at 1:36PM EDT until September 2 at 1:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-09-02T13:46:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ed2c3254f318208138a9ad532801fa240f5d6aae.001.1","noaa_urn:oid:2.49.0.1.840.0.9c023d9398745874c06ca40a79c08efc64196fe2.001.1","noaa_urn:oid:2.49.0.1.840.0.1355039c87864c9703372822ee431eb8eab889bb.002.1","noaa_urn:oid:2.49.0.1.840.0.8673dbc8c031dd2c2f1986f8d6598f89e6a87f8e.001.1","noaa_urn:oid:2.49.0.1.840.0.1be4a5037a7fd9b7d02f49f971b7c00757645d6b.001.1","noaa_urn:oid:2.49.0.1.840.0.8cc933472435a63677c7a8b11157b5996943e880.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 N Bentley Springs |
| Spc County | Baltimore |
| Spc State | MD |
| Spc Comments | Numerous wires down in northern Baltimore County... in and around Hereford. (LWX) |
| Iem TypeSummary | M |
| Iem Magnitude | 45 |
| Iem Unit | mph |
| Iem City | 1 N Baltimore Martin St |
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.
Want to know when something happens near Middle River?
Calamity.live data shows a weather event with CalamityScore 46/100, near Middle River (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.