This alert expired on 11 June 2026 at 22:21 UTC. It is kept here as a record.
It is the 11th strongest of the 30 detections recorded within 20 km of this point since 17 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 6:11PM EDT until June 11 at 6:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 87,505 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 2, 2026 · score 39 · 16.1 km
- July 19, 2026 · score 63 · 17.8 km
- July 28, 2026 · score 39 · 23.5 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, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 32 / 100 |
| Our confidence | 80% |
| Coordinates | 40.5500, -78.1723 |
| Nearest City | Altoona (19 km) |
| Population Exposed | 87.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T22:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.17260c6d00a0d33393cae645e2add85d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allegany, MD; Rockingham, VA; Shenandoah, VA; Grant, WV; Hampshire, WV; Hardy, WV; Mineral, WV; Pendleton, WV; Barbour, WV; Randolph, WV; Rockingham, VA; Grant, WV; Hardy, WV; Pendleton, WV and 9 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 6:11PM EDT until June 11 at 6:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-11T18:21:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.17260c6d00a0d33393cae645e2add85daa2ad205.001.1","noaa_urn:oid:2.49.0.1.840.0.84cd8abd7ab3b59a125acf963177dcda75bdd2f2.001.1","noaa_urn:oid:2.49.0.1.840.0.9222fe27d3f8d528d0f2db66c336f84e34b89e52.001.1","noaa_urn:oid:2.49.0.1.840.0.8e1b6ecb318911453aaca0f896a92fb90be6de0a.002.1","noaa_urn:oid:2.49.0.1.840.0.58313346a9409d1032001aef116d9f520d009a86.002.1","noaa_urn:oid:2.49.0.1.840.0.2e53f94c7a3ecac5f534b68f721c6fb8a7aeebf5.001.1","noaa_urn:oid:2.49.0.1.840.0.5d28523e13f2be654dc0f2c9561d0441b8faf29e.001.1","noaa_urn:oid:2.49.0.1.840.0.5e290d43393ed0cae36663527c3313c337642635.002.1","noaa_urn:oid:2.49.0.1.840.0.dff7d5877d95fde2e1aaf5cfc048b5362454baed.001.1","noaa_urn:oid:2.49.0.1.840.0.247083138c0fdb3c5731ffdf01d23e3db76a8ff8.001.1","noaa_urn:oid:2.49.0.1.840.0.0fafe4c5dec921fdadbc7729d417fd162156f78f.001.1","noaa_urn:oid:2.49.0.1.840.0.65ecb519b7b5df884a3c3ef2037b299017197407.002.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 32/100, near Altoona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.