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 22 June 2026 at 23:45 UTC. It is kept here as a record.
It is the 46th strongest of the 123 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 7:29PM EDT until June 22 at 7:45PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 446,217 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- June 22, 2026 · score 43 · 6.2 km
- July 7, 2026 · score 43 · 6.7 km
- June 13, 2026 · score 43 · 13.1 km
How we know
5 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.87/1 |
| Coordinates | 37.8738, -77.3310 |
| Nearest City | Mechanicsville (30 km) |
| Urban exposure index (PEI) | 446.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-22T23:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.142a6039db012f43ffc26ff7d07cc37a |
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: 2026-06-22T23:29:00.000Z.
First archived: 2026-06-22T23:32:29.138Z. 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 | St. Marys, MD; Caroline, MD; Queen Anne's, MD; Talbot, MD; Essex, VA; King and Queen, VA; King William, VA; Lancaster, VA; Middlesex, VA; Northumberland, VA; Richmond, VA; Westmoreland, VA and 10 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 7:29PM EDT until June 22 at 7:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-22T19:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.142a6039db012f43ffc26ff7d07cc37abf3039cb.001.1","noaa_urn:oid:2.49.0.1.840.0.aa8579c731c580015057953ac42db85cebe20b19.001.1","noaa_urn:oid:2.49.0.1.840.0.97ab7c065eba73b761cecdcfe81382e2b9dce1e9.002.1","noaa_urn:oid:2.49.0.1.840.0.04d5db6b50e0f3885602be3fdf95fbf348357c10.001.1","noaa_urn:oid:2.49.0.1.840.0.fc69cfb8044f65bf6bd9db9de10404fc8f61929e.001.1","noaa_urn:oid:2.49.0.1.840.0.8d32fa01f9b3da1da166e92fc6e33b5831413e6e.001.1","noaa_urn:oid:2.49.0.1.840.0.bfbf89b526a2d14416241992b2ad3f4131f01571.001.1","noaa_urn:oid:2.49.0.1.840.0.f500b9ff1ffa98ad9b5427d01ee33b4904dd9d56.002.1","noaa_urn:oid:2.49.0.1.840.0.740417b04c54b71483c568db60f041646ae42d34.001.1","noaa_urn:oid:2.49.0.1.840.0.22feb2d8ba0a1191ffdd63c4b23360d0224ef67c.001.1","noaa_urn:oid:2.49.0.1.840.0.f61fe898a2a11ea1212836a6c6d504fe67c2bfd2.002.1","noaa_urn:oid:2.49.0.1.840.0.c183245dbc90b6a5ed4c0f5ade4ce815b2993bed.002.1","noaa_urn:oid:2.49.0.1.840.0.83f3611818966fd6f97369d36b09d9d3884271b5.001.1","noaa_urn:oid:2.49.0.1.840.0.7d45a29fa94f77303ca3098e0bb075fb6145d9a3.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 NNW Mineral |
| Iem County | Louisa |
| Iem State | VA |
| Iem Wfo | AKQ |
| Iem Remark | Tree down along Chopping Rd. Time Estimated by Radar. |
| MergedSources | [{"id":"iem_D_37.820_-77.910_1782166020000","source":"iem","severity":"low","severityValue":25,"timestamp":1782166020000,"latitude":37.82,"longitude":-77.91},{"id":"iem_D_37.900_-78.070_1782164280000","source":"iem","severity":"low","severityValue":25,"timestamp":1782164280000,"latitude":37.9,"longitude":-78.07},{"id":"iem_D_37.880_-78.130_1782164100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782164100000,"latitude":37.88,"longitude":-78.13},{"id":"iem_D_38.030_-77.930_1782164100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782164100000,"latitude":38.03,"longitude":-77.93}] |
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.
Review the area, threshold and delivery channel in your account.
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