This alert expired on 21 June 2026 at 00:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 25 detections recorded within 20 km of this point since 20 April 2026. The last comparable one was on 20 June 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 20 at 8:04PM EDT until June 20 at 8:15PM EDT by NWS Pittsburgh PA
Nearby, since 20 April 2026
- June 20, 2026 · score 22 · 5.3 km
- August 8, 2026 · score 22 · 8.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 64 % 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 | 64% |
| Coordinates | 41.4613, -79.1247 |
| Nearest City | Jamestown (72 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-21T00:04:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b5af6706e73eeae6383c6efb3eb4f3345653410a.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Forest, PA |
| Headline | Severe Thunderstorm Warning issued June 20 at 8:04PM EDT until June 20 at 8:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-06-20T20:15:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | Hasson Heights |
| Iem County | Venango |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | Report from mPING: Dime (0.75 in.). |
| MergedSources | [{"id":"iem_H_41.450_-79.680_1781997360000","source":"iem","severity":"low","severityValue":25,"timestamp":1781997360000,"latitude":41.45,"longitude":-79.68}] |
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.
Want to know when something happens in this area?
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 185 scientific monitoring sources.