This alert expired on 8 August 2026 at 18:31 UTC. It is kept here as a record.
No stronger detection stands among the 235 recorded within 20 km of this point since 11 March 2026 — 93 others scored the same. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 8 at 2:23PM EDT until August 8 at 2:30PM EDT by NWS Mount Holly NJ
An estimated 2,739,806 people live within 50 km of this point.
Nearby, since 11 March 2026
- June 18, 2026 · score 48 · 4.5 km
- June 15, 2026 · score 48 · 6.3 km
- June 6, 2026 · score 48 · 8.1 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % 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) | 52 / 100 |
| Our confidence | 90% |
| Coordinates | 39.5720, -75.3895 |
| Nearest City | Bridgeton (21 km) |
| Population Exposed | 2.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-08T18:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2a5949931fd20d7219b23511faca3b64 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kent, DE; New Castle, DE; Kent, MD; Queen Anne's, MD; Gloucester, NJ; Salem, NJ; Camden, NJ; Cumberland, NJ; Gloucester, NJ; Salem, NJ |
| Headline | Severe Thunderstorm Warning issued August 8 at 2:23PM EDT until August 8 at 2:30PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-08T14:31:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2a5949931fd20d7219b23511faca3b645393d940.001.1","noaa_urn:oid:2.49.0.1.840.0.a12b1d6e84bfeaa2538ab89ffce303db1b0d9c2d.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 WNW Port Deposit |
| Iem County | Harford |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Power lines down on Stafford Road. |
| MergedSources | [{"id":"iem_D_39.900_-76.020_1786208820000","source":"iem","severity":"low","severityValue":25,"timestamp":1786208820000,"latitude":39.9,"longitude":-76.02},{"id":"iem_D_39.910_-76.050_1786208820000","source":"iem","severity":"low","severityValue":25,"timestamp":1786208820000,"latitude":39.91,"longitude":-76.05},{"id":"iem_D_39.680_-76.160_1786209300000","source":"iem","severity":"low","severityValue":25,"timestamp":1786209300000,"latitude":39.68,"longitude":-76.16},{"id":"iem_D_39.620_-76.160_1786209000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786209000000,"latitude":39.62,"longitude":-76.16}] |
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 52/100, near Bridgeton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.