This alert expired on 2 September 2026 at 00:00 UTC. It is kept here as a record.
It is the 20th strongest of the 35 detections recorded within 20 km of this point since 31 March 2026. The last comparable one was on 10 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 1 at 7:06PM EDT until September 1 at 8:00PM EDT by NWS Pittsburgh PA
Nearby, since 31 March 2026
- June 20, 2026 · score 22 · 6.3 km
- June 21, 2026 · score 22 · 9.5 km
- August 8, 2026 · score 22 · 10.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 71 % 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) | 16 / 100 |
| Our confidence | 71% |
| Coordinates | 41.5221, -79.2051 |
| Nearest City | Jamestown (64 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-01T23:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a5f88a674f51cbb113bb9b32f470f43e9c48cab3.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clarion, PA; Forest, PA; Jefferson, PA; Warren, PA |
| Headline | Severe Thunderstorm Warning issued September 1 at 7:06PM EDT until September 1 at 8:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-01T20:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a5f88a674f51cbb113bb9b32f470f43e9c48cab3.002.1","noaa_urn:oid:2.49.0.1.840.0.4233b21bb6690f53c389eb3a2e2a3ec3345ea66b.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 3 SSW Blooming Valley |
| Spc County | Crawford |
| Spc State | PA |
| Spc Comments | County dispatch reporting multiple trees and power lines down on the east side of Meadville. Time was estimated via radar. (CLE) |
| Iem TypeSummary | D |
| Iem City | 3 SSW Blooming Valley |
| Iem County | Crawford |
| Iem State | PA |
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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.