Right now
The most recent data we hold from NOAA arrived 12 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 4 July 2026 at 21:30 UTC. It is kept here as a record.
It is the 4th strongest of the 42 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 5:10PM EDT until July 4 at 5:30PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 20,130 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- August 10, 2026 · score 58 · 16.8 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 39.6319, -78.7362 |
| Nearest City | Cumberland (3 km) |
| Urban exposure index (PEI) | 20.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T21:10:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ba3d956a4d0fa64658c2de710ab71bde |
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: 2026-07-04T21:10:00.000Z.
First archived: 2026-07-04T21:11:54.688Z. 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 | Fauquier, VA; Rappahannock, VA; Warren, VA; Louisa, VA; Fluvanna, VA; Louisa, VA and 22 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 5:10PM EDT until July 4 at 5:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-04T17:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 25 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ba3d956a4d0fa64658c2de710ab71bdee1648da9.001.1","noaa_urn:oid:2.49.0.1.840.0.9a8e961ae95a7494fb2ed5ae14d17813f4874553.001.1","noaa_urn:oid:2.49.0.1.840.0.7b71fbf386e8c028897c4d71ed8ad819e397043a.001.1","noaa_urn:oid:2.49.0.1.840.0.0817a259cde392857000b48487781a570fbe8716.001.1","noaa_urn:oid:2.49.0.1.840.0.fc2340fa96cb8c01c566176f8f022bacb4e669e1.001.1","noaa_urn:oid:2.49.0.1.840.0.1dad7d91b072a3b7c3ab9ddca11149eca5c797c0.001.1","noaa_urn:oid:2.49.0.1.840.0.09286318d4960747764216d27de0fc2ba40b44b7.001.1","noaa_urn:oid:2.49.0.1.840.0.473f2b861aa8148349b7075cfe67882c7af3fc15.001.1","noaa_urn:oid:2.49.0.1.840.0.48c6d7fe9dfa5a4268bd7e09c70204d495bc3f1f.001.1","noaa_urn:oid:2.49.0.1.840.0.622442f15ab77d67bb47b47305efd1c60dab7b3c.001.1","noaa_urn:oid:2.49.0.1.840.0.52992595b8b353cdd8186042d5a6c047213e8766.001.1","noaa_urn:oid:2.49.0.1.840.0.5c746cea45f7f9617231218c39787ca17fe0e646.001.1","noaa_urn:oid:2.49.0.1.840.0.36339053bef2b81b3005864276c0667df9415221.001.1","noaa_urn:oid:2.49.0.1.840.0.443b935e6995ad2610b36f876c75a19e81301b0d.001.1","noaa_urn:oid:2.49.0.1.840.0.e26be90368e3c6826486f66278865c0ac8ebc11d.001.1","noaa_urn:oid:2.49.0.1.840.0.6f40d9da7ab7acf702ae71928056d03659922662.001.1","noaa_urn:oid:2.49.0.1.840.0.ea96b25a74f135242f4b72fa4f791ad2312dc303.001.1","noaa_urn:oid:2.49.0.1.840.0.702a7a13bf2df18aaa28b57db00c0693a799106b.002.1","noaa_urn:oid:2.49.0.1.840.0.1498712bd04b56939e0c09c3a8a8e419887a688e.001.1","noaa_urn:oid:2.49.0.1.840.0.940463fcea8404c07d50d4b6c2114c301e771d4b.001.1","noaa_urn:oid:2.49.0.1.840.0.bc80d05e20d9d1c08f105ff479c94a133ad566a2.001.1","noaa_urn:oid:2.49.0.1.840.0.6486039f68dfce277b54d6414ba548fa9cca8e72.001.1","noaa_urn:oid:2.49.0.1.840.0.48c52888dcd9910bfb826522d2671348565ab6fd.002.1","noaa_urn:oid:2.49.0.1.840.0.bf0a88d43050662384202d709021a40413600fcd.002.1","noaa_urn:oid:2.49.0.1.840.0.8c7baea6118f7450a83ba918a0fa2d5cd99bcf25.001.1"] |
| Iem TypeSummary | D |
| Iem City | 6 ENE Brandonville |
| Iem County | Preston |
| Iem State | WV |
| Iem Wfo | PBZ |
| Iem Remark | trees down. |
| MergedSources | [{"id":"iem_D_39.820_-78.430_1783197000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783197000000,"latitude":39.82,"longitude":-78.43},{"id":"iem_D_39.710_-79.520_1783190220000","source":"iem","severity":"low","severityValue":25,"timestamp":1783190220000,"latitude":39.71,"longitude":-79.52}] |
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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