Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 12 June 2026 at 01:01 UTC. It is kept here as a record.
It is the 119th strongest of the 283 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 20 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 8:52PM EDT until June 11 at 9:00PM EDT by NWS Mount Holly NJ
An estimated 364,324 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 12, 2026 · score 37 · 0.4 km
- August 27, 2026 · score 48 · 8.6 km
- August 8, 2026 · score 37 · 12.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 79 % 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) | 37 / 100 |
| Our confidence | 79% |
| Coordinates | 39.9583, -75.9854 |
| Nearest City | Lancaster (29 km) |
| Population Exposed | 364.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T00:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.35b22184183adbcb56c1a9176d180050 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Berks, PA; Carbon, PA; Lehigh, PA; Caroline, MD; Kent, MD; Queen Anne's, MD; Talbot, MD; Anne Arundel, MD; Baltimore, MD; Calvert, MD; Cecil, MD; Charles, MD; Harford, MD; Howard, MD; Prince Georges, MD; St. Marys, MD; Baltimore City, MD; King George, VA; Spotsylvania, VA; Stafford, VA; City of Fredericksburg, VA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 8:52PM EDT until June 11 at 9:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-06-11T21:01:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.35b22184183adbcb56c1a9176d180050497b1070.001.1","noaa_urn:oid:2.49.0.1.840.0.fb449c37b46999b61a6c5d728e81438221452636.001.1","noaa_urn:oid:2.49.0.1.840.0.3465cbaa0f04431aea1bc947f8838d495fa9fad9.002.1","noaa_urn:oid:2.49.0.1.840.0.731f5b6f4a1a2170bc74187bc50c5b8ebbbe134e.001.1","noaa_urn:oid:2.49.0.1.840.0.20cd902eac595a5692a575cbf83e3ca8ce96821c.001.1","noaa_urn:oid:2.49.0.1.840.0.45140a80b2c989c1c4c0f49786e683da5b3d882c.001.1","noaa_urn:oid:2.49.0.1.840.0.ec268c4d1d14dad7c4856b041c11a995e73e1d8e.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 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.
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