This alert expired on 18 July 2026 at 10:21 UTC. It is kept here as a record.
It is the 3rd strongest of the 124 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 6:11AM EDT until July 18 at 6:15AM EDT by NWS Pittsburgh PA
An estimated 633,621 people live within 50 km of this point.
Nearby, since 17 March 2026
- March 27, 2026 · score 48 · 2.6 km
- August 10, 2026 · score 48 · 7.2 km
- August 7, 2026 · score 48 · 7.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 81 % 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) | 48 / 100 |
| Our confidence | 81% |
| Coordinates | 40.4008, -79.8533 |
| Nearest City | West Mifflin (5 km) |
| Population Exposed | 633.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T10:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8aee7c86032cea83c8fe3c6ac040343dd67d811d.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allegheny, PA |
| Headline | Severe Thunderstorm Warning issued July 18 at 6:11AM EDT until July 18 at 6:15AM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-18T06:21:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
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 48/100, near West Mifflin (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.