This alert expired on 10 August 2026 at 22:45 UTC. It is kept here as a record.
No stronger detection stands among the 113 recorded within 20 km of this point since 17 March 2026 — 17 others scored the same. The last comparable one was on 5 August 2026. 37 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 10 at 6:22PM EDT until August 10 at 6:45PM EDT by NWS Mount Holly NJ
An estimated 511,761 people live within 50 km of this point.
Nearby, since 17 March 2026
- March 17, 2026 · score 48 · 8.7 km
- July 22, 2026 · score 48 · 14.2 km
- July 22, 2026 · score 48 · 14.4 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 79 % 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 | 79% |
| Coordinates | 37.4254, -77.2460 |
| Nearest City | Hopewell (14 km) |
| Population Exposed | 511.8K within 50 km |
| Impact Tier | significant |
| Date | 2026-08-10 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6212c4176758235aa00b5c12a29673ee |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Sussex, DE; Calvert, MD; St. Marys, MD; Charles City, VA; Chesterfield, VA; Goochland, VA; Hanover, VA; Henrico, VA; King William, VA; New Kent, VA; Powhatan, VA; Prince George, VA; City of Hopewell, VA; City of Richmond, VA and 8 more areas |
| Headline | Severe Thunderstorm Warning issued August 10 at 6:22PM EDT until August 10 at 6:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-10T18:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6212c4176758235aa00b5c12a29673ee0aba09bf.001.1","noaa_urn:oid:2.49.0.1.840.0.f51227b98e4e259ef125f320c0b6b34a52c7b236.001.1","noaa_urn:oid:2.49.0.1.840.0.4b6def6ab9cddf9eca462181039a7b0d6bd974b8.001.1","noaa_urn:oid:2.49.0.1.840.0.fbe6f2410869fb1ab0bda8c61c9f9bf0e79f7f53.001.1","noaa_urn:oid:2.49.0.1.840.0.2e9bfa66f6434e3d0a53819adfcdd544c650f3b4.001.1","noaa_urn:oid:2.49.0.1.840.0.1d4c9569cc4c1b619b1350f6ef7531d587276f69.001.1","noaa_urn:oid:2.49.0.1.840.0.5bce5eb63568efb16e2ed0a7d82f739d91c8818a.001.1","noaa_urn:oid:2.49.0.1.840.0.e9c88535be6a0b25fe47840551ba903e0297870b.001.1","noaa_urn:oid:2.49.0.1.840.0.395f6f91e440e9c42f2df04446a99ee45c2f38ed.001.1","noaa_urn:oid:2.49.0.1.840.0.5e69d9e9698d04480e94961ba7e5418052b82e9a.002.1","noaa_urn:oid:2.49.0.1.840.0.203d87ba29828d33232d627c92f938ab53d26d23.001.1"] |
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 Hopewell (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.