Right now
The most recent data we hold from NOAA arrived 8 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 4 July 2026 at 20:15 UTC. It is kept here as a record.
It is the 18th strongest of the 73 detections recorded within 20 km of this point since 31 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 July 4 at 3:42PM EDT until July 4 at 4:15PM EDT by NWS Pittsburgh PA
Nearby, since 31 March 2026
- September 3, 2026 · score 46 · 11.3 km
- September 1, 2026 · score 16 · 16.9 km
- September 14, 2026 · score 16 · 17.2 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 | 0.62/1 |
| Coordinates | 41.5778, -78.8468 |
| Nearest City | Jamestown (67 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-04T19:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ebdbfc7928f452e0f274de9af9b5cc27 |
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: 2026-07-04T19:42:00.000Z.
First archived: 2026-07-04T19:44:08.583Z. 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 | Mercer, PA; Venango, PA; McKean, PA; Potter, PA; Columbiana, OH; Beaver, PA; Butler, PA; Lawrence, PA and 8 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 3:42PM EDT until July 4 at 4:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-04T16:15:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ebdbfc7928f452e0f274de9af9b5cc27eda67dae.001.1","noaa_urn:oid:2.49.0.1.840.0.f5d310a00b2f3fec19d1f0f9735d563e1701f90b.001.1","noaa_urn:oid:2.49.0.1.840.0.24bc56a65c34953f4f616058c9993c8de104c61a.001.1","noaa_urn:oid:2.49.0.1.840.0.30b64e1c87b33e812022196f34198ba225469003.001.1","noaa_urn:oid:2.49.0.1.840.0.eb70a39c0b3f42d7d599d03eff69c39cc20c6fee.002.1","noaa_urn:oid:2.49.0.1.840.0.9946b67fd93c23342c1645028ffaa9f4e5013671.001.1","noaa_urn:oid:2.49.0.1.840.0.a8515badc9cc493657225cee98de0cad7782c512.001.1","noaa_urn:oid:2.49.0.1.840.0.65e365a3b1d725c5ebc8f487cff8386cacc1f780.001.1","noaa_urn:oid:2.49.0.1.840.0.9fce5cf0e73af6245d92b373cdf14ad256566eae.001.1","noaa_urn:oid:2.49.0.1.840.0.4a833f1b8687adae2019509640fab34389bff59b.001.1","noaa_urn:oid:2.49.0.1.840.0.dbf688c3f41c1139d75f1a7a498eee067b905e30.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 W Chapman State Park |
| Iem County | Warren |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Trees down on wires along Pleasant Drive. |
| MergedSources | [{"id":"iem_D_41.770_-79.240_1783191000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783191000000,"latitude":41.77,"longitude":-79.24}] |
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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