Right now
The most recent data we hold from NOAA arrived 12 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 18 July 2026 at 21:30 UTC. It is kept here as a record.
It is the 28th strongest of the 111 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 3 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 4:52PM EDT until July 18 at 5:30PM EDT by NWS Pittsburgh PA
Nearby, since 17 March 2026
- August 2, 2026 · score 58 · 11.6 km
- June 6, 2026 · score 22 · 11.8 km
- August 9, 2026 · score 34 · 11.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.59/1 |
| Coordinates | 41.6568, -79.5468 |
| Nearest City | Jamestown (55 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-18T20:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.48d3b6a807ab44bd5985a122f4df74e4 |
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: 2026-07-18T20:52:00.000Z.
First archived: 2026-07-18T20:54:15.037Z. 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; McKean, PA; Warren, PA; Erie, PA and 8 more areas |
| Headline | Severe Thunderstorm Warning issued July 18 at 4:52PM EDT until July 18 at 5:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-18T17:30:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.48d3b6a807ab44bd5985a122f4df74e455b95dff.002.1","noaa_urn:oid:2.49.0.1.840.0.4d74b174a8a25b6ec39f9fc382dce8d3c6eca2f7.001.1","noaa_urn:oid:2.49.0.1.840.0.0ba34488091f72fe4ac7ad57b102730f52cc5c8c.001.1","noaa_urn:oid:2.49.0.1.840.0.0387c6742173e9e557d90d73a8d355e5c7acf4b8.002.1","noaa_urn:oid:2.49.0.1.840.0.9fb649df8b7ef718544850f7bfcb65804d96e1ed.001.1","noaa_urn:oid:2.49.0.1.840.0.d07f054b10f1dd99419f5754e9f21fbef2db3f70.001.1","noaa_urn:oid:2.49.0.1.840.0.edaa375bc1c24c9d35b8589a1835aac07e796b26.001.1","noaa_urn:oid:2.49.0.1.840.0.a8f6b6ce86239cf6a03c46b1dadf460dc6d2e6b6.001.1","noaa_urn:oid:2.49.0.1.840.0.54faa61c5c3775d5555b5037bd4d4e2e2d35f5c6.001.1","noaa_urn:oid:2.49.0.1.840.0.c0d9bb7ff68b5ed477af93b3ba1b4587a337fee6.001.1","noaa_urn:oid:2.49.0.1.840.0.646f493f6814a5f25eef76b993a6a4fbf23aa6da.002.1"] |
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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