This alert expired on 10 July 2026 at 02:00 UTC. It is kept here as a record.
It is the 105th strongest of the 266 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 9 July 2026. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 9 at 8:30PM EDT until July 9 at 10:00PM EDT by NWS Mount Holly NJ
An estimated 56,020 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 16, 2026 · score 51 · 0.0 km
- June 23, 2026 · score 43 · 6.3 km
- July 9, 2026 · score 39 · 6.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 39.0000, -75.8667 |
| Nearest City | Easton (32 km) |
| Population Exposed | 56.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-10T00:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.233663bfe56841eadc42636422c4754b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Kent, DE; Sussex, DE; Atlantic, NJ; Cape May, NJ; Cumberland, NJ; Delaware Bay waters north of East Point NJ to Slaughter Beach DE; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; Dorchester, MD; Somerset, MD; Wicomico, MD; Worcester, MD; Accomack, VA; Lancaster, VA; Middlesex, VA; Northumberland, VA |
| Headline | Severe Thunderstorm Watch issued July 9 at 8:30PM EDT until July 9 at 10:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-09T22:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.233663bfe56841eadc42636422c4754be788e546.002.1","noaa_urn:oid:2.49.0.1.840.0.233663bfe56841eadc42636422c4754be788e546.003.1","noaa_urn:oid:2.49.0.1.840.0.6cfa19c4d729ae12831b7df4f045bd650db0a1c4.002.1"] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.