This alert expired on 3 August 2026 at 00:31 UTC. It is kept here as a record.
It is the 13th strongest of the 54 detections recorded within 20 km of this point since 22 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 2 at 8:21PM EDT until August 2 at 8:30PM EDT by NWS Pittsburgh PA
Nearby, since 22 March 2026
- July 19, 2026 · score 34 · 15.6 km
- August 9, 2026 · score 22 · 16.6 km
- June 14, 2026 · score 46 · 21.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 67 % 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) | 22 / 100 |
| Our confidence | 67% |
| Coordinates | 40.8750, -79.2125 |
| Nearest City | Plum (62 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-03T00:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4afeead95dc6bf928ab64ba7fdf903ad15b236f6.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Armstrong, PA; Indiana, PA |
| Headline | Severe Thunderstorm Warning issued August 2 at 8:21PM EDT until August 2 at 8:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-08-02T20:31:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | Butler |
| Iem County | Butler |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | Multiple reports of flooding on roadways across Butler City. |
| MergedSources | [{"id":"iem_F_40.860_-79.900_1785699000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785699000000,"latitude":40.86,"longitude":-79.9}] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.