This alert expired on 11 June 2026 at 20:21 UTC. It is kept here as a record.
It is the 35th strongest of the 113 detections recorded within 20 km of this point since 11 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 June 11 at 4:11PM EDT until June 11 at 4:15PM EDT by NWS Pittsburgh PA
An estimated 605,523 people live within 50 km of this point.
Nearby, since 11 March 2026
- July 4, 2026 · score 48 · 8.7 km
- August 10, 2026 · score 48 · 12.1 km
- August 5, 2026 · score 41 · 13.5 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 | 40.1760, -79.8509 |
| Nearest City | McKeesport (19 km) |
| Population Exposed | 605.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T20:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c4cff6eeef30174d1876e2a76ef7236e |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Belmont, OH; Harrison, OH; Jefferson, OH; Monroe, OH; Washington, PA; Brooke, WV; Marshall, WV; Ohio, WV; Fayette, PA; Westmoreland, PA; Marion, WV; Monongalia, WV; Preston, WV; Armstrong, PA; Clarion, PA; Indiana, PA; Jefferson, PA; Westmoreland, PA and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 4:11PM EDT until June 11 at 4:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-06-11T16:21:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c4cff6eeef30174d1876e2a76ef7236e08ea6a4a.001.1","noaa_urn:oid:2.49.0.1.840.0.bebf31aed5b01d06366512bf371dfee86a620c04.002.1","noaa_urn:oid:2.49.0.1.840.0.0493a38dcc708e9af7661cdace97b04dd7e71d16.002.1","noaa_urn:oid:2.49.0.1.840.0.4b688077bbdce3b2ba3633f46db56d252faabc36.001.1","noaa_urn:oid:2.49.0.1.840.0.9b34b61fd228b623fbffd9a839aed2a629d6b170.001.1"] |
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 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, near McKeesport (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.