Right now
The most recent data we hold from NOAA arrived 31 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 13 May 2026 at 19:00 UTC. It is kept here as a record.
It is the 4th strongest of the 40 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 2:34PM EDT until May 13 at 3:00PM EDT by NWS Pittsburgh PA
Nearby, since 17 March 2026
- June 21, 2026 · score 22 · 4.6 km
- June 20, 2026 · score 22 · 7.8 km
- August 8, 2026 · score 22 · 12.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.66/1 |
| Coordinates | 41.4203, -79.1173 |
| Nearest City | Jamestown (76 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-13T18:34:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c47e2a0522c4997f3b768d878eed6432 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-13T18:34:00.000Z.
First archived: 2026-05-13T18:40:59.347Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clarion, PA; Jefferson, PA; Allegany, NY; Livingston, NY; Wyoming, NY; Belmont, OH; Jefferson, OH; Washington, PA; Brooke, WV; Ohio, WV and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 13 at 2:34PM EDT until May 13 at 3:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-13T15:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c47e2a0522c4997f3b768d878eed6432ac75df39.002.1","noaa_urn:oid:2.49.0.1.840.0.f66cc2863affd843e8c3c3e2c020c59ecfbf2e5e.002.1","noaa_urn:oid:2.49.0.1.840.0.069c117d2b26e08e27502c8fdac13436be4e51f1.001.1","noaa_urn:oid:2.49.0.1.840.0.9daf29cf3f15e97600a579e70747d34df5c5ab2f.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 1 NE Franklin |
| Iem County | Venango |
| Iem State | PA |
| Iem Wfo | PBZ |
| MergedSources | [{"id":"iem_H_41.400_-79.830_1778694600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778694600000,"latitude":41.4,"longitude":-79.83}] |
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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