Right now
The most recent data we hold from NOAA arrived 54 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 11 June 2026 at 22:15 UTC. It is kept here as a record.
It is the 9th strongest of the 83 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 5:43PM EDT until June 11 at 6:15PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 65,310 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- June 11, 2026 · score 32 · 15.4 km
- June 15, 2026 · score 39 · 16.2 km
- June 6, 2026 · score 39 · 22.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 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) | 32 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 40.1239, -78.6600 |
| Nearest City | Johnstown (32 km) |
| Urban exposure index (PEI) | 65.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T21:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.462a0170b5f9ebc4c9bdd3a3ca68f7b8 |
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: 2026-06-11T21:43:00.000Z.
First archived: 2026-06-11T21:47:55.264Z. 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 | Rockingham, VA; Grant, WV; Hardy, WV; Pendleton, WV; Nicholas, WV; Barbour, WV; Randolph, WV; Upshur, WV and 8 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 5:43PM EDT until June 11 at 6:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-11T18:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.462a0170b5f9ebc4c9bdd3a3ca68f7b8bdc97230.001.1","noaa_urn:oid:2.49.0.1.840.0.39618571467e87df96157ebb473e338b601c65b8.001.1","noaa_urn:oid:2.49.0.1.840.0.edee0d23c5c2616b01b1fd19aee866115f58dfd3.001.1","noaa_urn:oid:2.49.0.1.840.0.6f7f1e177a22f3641d345dd3a98c62122f2c40c1.001.1","noaa_urn:oid:2.49.0.1.840.0.b91ae5c90293e37b5d12d003725075f6799a636e.001.1","noaa_urn:oid:2.49.0.1.840.0.2b4e8c23923461200fecf65b6ceddcf72e6f3f8e.001.1","noaa_urn:oid:2.49.0.1.840.0.9de963617dfcaf225b1a0581f24978facc06cf04.001.1","noaa_urn:oid:2.49.0.1.840.0.ec6aec84e3e00f5cde19ef5e9dc7dc2846dd2a82.001.1","noaa_urn:oid:2.49.0.1.840.0.dff7d5877d95fde2e1aaf5cfc048b5362454baed.001.1","noaa_urn:oid:2.49.0.1.840.0.01646c1fb2a35c3aff5bdd04811cd3a5f8a96f38.001.1","noaa_urn:oid:2.49.0.1.840.0.36794172b2b6aa747df355e76c4189199e5835c8.001.1"] |
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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