Right now
The most recent data we hold from NOAA arrived 83 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
11 other detections within 20 km in the last 24 hours, the nearest 9 km from here.
This alert expired on 13 September 2026 at 22:00 UTC. It is kept here as a record.
It is the 54th strongest of the 205 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 4 September 2026. 84 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 13 at 5:18PM EDT until September 13 at 6:00PM EDT by NWS Pittsburgh PA
An estimated 255,078 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 9, 2026 · score 43 · 4.7 km
- June 25, 2026 · score 43 · 12.1 km
- July 21, 2026 · score 67 · 12.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 81% |
| Coordinates | 41.0203, -80.4387 |
| Nearest City | New Castle (8 km) |
| Population Exposed | 255.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T21:18:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.2c1370333a5a1f796d83ac8158beeadeaafc5ae4.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carroll, OH; Columbiana, OH; Jefferson, OH; Mercer, PA; Venango, PA |
| Headline | Severe Thunderstorm Warning issued September 13 at 5:18PM EDT until September 13 at 6:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-13T18:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2c1370333a5a1f796d83ac8158beeadeaafc5ae4.001.1","noaa_urn:oid:2.49.0.1.840.0.ad78ba0439be9a1aafca0ae397983ea0e970464a.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 8 March 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.
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