Right now
The most recent data we hold from NOAA arrived 1 minute 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 22:00 UTC. It is kept here as a record.
It is the 47th strongest of the 170 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 12 at 5:20PM EDT until June 12 at 6:00PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 64,154 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 5, 2026 · score 45 · 5.1 km
- September 4, 2026 · score 45 · 5.1 km
- July 6, 2026 · score 39 · 7.1 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 38.1791, -78.2330 |
| Nearest City | Charlottesville (27 km) |
| Urban exposure index (PEI) | 64.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T21:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b401617ecd8831b3bd542d18d0c39878 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-12T21:20:00.000Z.
First archived: 2026-06-12T21:23:34.751Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greene, VA; Madison, VA; King George, VA; Spotsylvania, VA; Stafford, VA; City of Fredericksburg, VA; Spotsylvania, VA and 7 more areas |
| Headline | Severe Thunderstorm Warning issued June 12 at 5:20PM EDT until June 12 at 6:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-12T18:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b401617ecd8831b3bd542d18d0c39878a4717306.002.1","noaa_urn:oid:2.49.0.1.840.0.078c1f5e562026c8bbde7cf1c342258215ba9c1b.002.1","noaa_urn:oid:2.49.0.1.840.0.adbdb1c3070c5e3b34926c420477710552893850.001.1","noaa_urn:oid:2.49.0.1.840.0.2e2ecc48889cd539bf2da61ee5d8c880d2836187.001.1","noaa_urn:oid:2.49.0.1.840.0.791d8a957d007fa614899843b0d5a69336fa01ea.002.1","noaa_urn:oid:2.49.0.1.840.0.dd99842c1014df9e110b45afeaaa084a5a28eec4.001.1","noaa_urn:oid:2.49.0.1.840.0.c882ea496375f4117a0ac2574818199b731f540c.001.1","noaa_urn:oid:2.49.0.1.840.0.3ae98f8d384ab0da78e488c610536a43d6c481af.001.1","noaa_urn:oid:2.49.0.1.840.0.46773b15f83683fa583e53c7bdede33aa1be7566.001.1","noaa_urn:oid:2.49.0.1.840.0.3c2ea123c4de54c6bff08297b77fec23104315fd.001.1","noaa_urn:oid:2.49.0.1.840.0.a19d607aac5a81052abba92d731c782bbec74e69.001.1"] |
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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