This alert expired on 11 June 2026 at 20:45 UTC. It is kept here as a record.
It is the 20th strongest of the 46 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 3:41PM EDT until June 11 at 4:45PM EDT by NWS Pittsburgh PA
An estimated 513,132 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 6, 2026 · score 43 · 5.8 km
- May 27, 2026 · score 43 · 7.0 km
- July 5, 2026 · score 43 · 7.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 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) | 41 / 100 |
| Our confidence | 80% |
| Coordinates | 40.0457, -80.2550 |
| Nearest City | Upper Saint Clair (36 km) |
| Population Exposed | 513.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T19:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7e049e3cbf4347307d7514b673a888f2 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fayette, PA; Greene, PA; Washington, PA; Westmoreland, PA; Marion, WV; Monongalia, WV; Preston, WV; Wetzel, WV; Belmont, OH; Guernsey, OH; Harrison, OH; Jefferson, OH; Monroe, OH; Muskingum, OH; Noble, OH; Allegheny, PA; Washington, PA; Brooke, WV; Hancock, WV; Marshall, WV; Ohio, WV; Allegheny, PA; Armstrong, PA; Butler, PA; Clarion, PA; Washington, PA; Westmoreland, PA; Ohio, WV |
| Headline | Severe Thunderstorm Warning issued June 11 at 3:41PM EDT until June 11 at 4:45PM EDT by NWS Pittsburgh PA |
| Expires | 2026-06-11T16:45:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7e049e3cbf4347307d7514b673a888f2a0eeafcf.001.1","noaa_urn:oid:2.49.0.1.840.0.554088f22cc3ab15658070ea5f804fdfcee4ecd5.001.1","noaa_urn:oid:2.49.0.1.840.0.e715e1660769fb76c6305a56de2b3def583f6189.002.1"] |
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 41/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.