This alert expired on 7 August 2026 at 23:49 UTC. It is kept here as a record.
It is the 6th strongest of the 31 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 7:39PM EDT until August 7 at 7:45PM EDT by NWS Pittsburgh PA
An estimated 140,391 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 5, 2026 · score 43 · 9.6 km
- July 10, 2026 · score 43 · 23.0 km
- August 6, 2026 · score 48 · 23.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 78 % 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) | 43 / 100 |
| Our confidence | 78% |
| Coordinates | 40.5189, -79.2656 |
| Nearest City | Johnstown (36 km) |
| Population Exposed | 140.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T23:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3616a443e640b03f3b257c3ea0468127 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allegheny, PA; Centre, PA; Huntingdon, PA; Mifflin, PA |
| Headline | Severe Thunderstorm Warning issued August 7 at 7:39PM EDT until August 7 at 7:45PM EDT by NWS Pittsburgh PA |
| Expires | 2026-08-07T19:49:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3616a443e640b03f3b257c3ea0468127da64393f.001.1","noaa_urn:oid:2.49.0.1.840.0.10bbb72ee7a0c12ed0db6d2f8775abaf6d0e29f1.001.1","noaa_urn:oid:2.49.0.1.840.0.4e79317a357e1720d180ba54a16cd7a13ccdc2a9.001.1"] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.