Right now
The most recent data we hold from NOAA arrived 3 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 00:30 UTC. It is kept here as a record.
It is the 796th strongest of the 949 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 30 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 7:54PM EDT until June 11 at 8:30PM EDT by NWS Baltimore MD/Washington DC
An estimated 4,480,602 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 5, 2026 · score 52 · 4.0 km
- March 17, 2026 · score 52 · 4.6 km
- September 4, 2026 · score 46 · 6.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Our confidence | 79% |
| Coordinates | 38.8953, -77.1320 |
| Nearest City | Arlington (3 km) |
| Population Exposed | 4.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T23:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5d610d63514f7f980bf1116ab0e22019e79fa01e.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | District of Columbia, DC; Anne Arundel, MD; Baltimore, MD; Carroll, MD; Charles, MD; Frederick, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Arlington, VA; Culpeper, VA; Fairfax, VA; Fauquier, VA; King George, VA; Loudoun, VA; Madison, VA; Orange, VA; Prince William, VA; Spotsylvania, VA; Stafford, VA; City of Alexandria, VA; City of Fairfax, VA; City of Falls Church, VA; City of Fredericksburg, VA; City of Manassas, VA; City of Manassas Park, VA |
| Headline | Severe Thunderstorm Warning issued June 11 at 7:54PM EDT until June 11 at 8:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-11T20:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
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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