Right now
The most recent data we hold from NOAA arrived 5 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 02:15 UTC. It is kept here as a record.
It is the 4th strongest of the 157 detections recorded within 20 km of this point since 23 March 2026. The last comparable one was on 3 July 2026. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 9:24PM EDT until July 3 at 10:15PM EDT by NWS Cleveland OH
Urban PEI: 186,735 within a heuristic 50 km radius; not unique people.
Nearby, since 23 March 2026
- May 9, 2026 · score 43 · 4.6 km
- May 10, 2026 · score 43 · 4.7 km
- June 20, 2026 · score 43 · 6.0 km
How we know
10 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 41.1291, -80.2065 |
| Nearest City | New Castle (19 km) |
| Urban exposure index (PEI) | 186.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.33cf4df3e11208f2e6aa975204597e2f |
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: 2026-07-04T01:24:00.000Z.
First archived: 2026-07-04T01:26:04.300Z. 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 | Ashtabula, OH; Trumbull, OH; Crawford, PA; Beaver, PA; Lawrence, PA; Clearfield, PA; Elk, PA and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 9:24PM EDT until July 3 at 10:15PM EDT by NWS Cleveland OH |
| Expires | 2026-07-03T22:15:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.33cf4df3e11208f2e6aa975204597e2f13f7fa3b.001.1","noaa_urn:oid:2.49.0.1.840.0.d16146a21804dfe686a6e2086ae17e9cdb80d5e6.002.1","noaa_urn:oid:2.49.0.1.840.0.a7f0583d0aa0b98e0a388cbb06bc7b54bdf12921.001.1","noaa_urn:oid:2.49.0.1.840.0.d9f082317db539f8706fe56b9ba7d3cc5bc04ecb.001.1","noaa_urn:oid:2.49.0.1.840.0.dcd8cbcf0281bc7b9545046f2c09516c74cf174e.001.1","noaa_urn:oid:2.49.0.1.840.0.62593c9a9e36cca85c63aaa4a26d04b3133697ba.002.1","noaa_urn:oid:2.49.0.1.840.0.a22728ecb4e168fb3f8b983a7d4eba862fd501fb.002.1","noaa_urn:oid:2.49.0.1.840.0.b25394f35d7d7faefe627f044eb313633aa63a5c.001.1"] |
| Iem TypeSummary | D |
| Iem City | 5 W Knox |
| Iem County | Clarion |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | Trees down on wire. Near 2028 Community Rd. Time based on radar estimate. |
| MergedSources | [{"id":"iem_D_40.980_-79.660_1783125480000","source":"iem","severity":"low","severityValue":25,"timestamp":1783125480000,"latitude":40.98,"longitude":-79.66},{"id":"iem_L_41.170_-80.170_1783121220000","source":"iem","severity":"low","severityValue":25,"timestamp":1783121220000,"latitude":41.17,"longitude":-80.17},{"id":"iem_D_41.240_-80.490_1783120620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783120620000,"latitude":41.24,"longitude":-80.49},{"id":"iem_D_41.120_-79.720_1783124460000","source":"iem","severity":"low","severityValue":25,"timestamp":1783124460000,"latitude":41.12,"longitude":-79.72},{"id":"iem_D_40.950_-79.670_1783125600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783125600000,"latitude":40.95,"longitude":-79.67},{"id":"iem_D_41.190_-80.100_1783121820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783121820000,"latitude":41.19,"longitude":-80.1},{"id":"iem_D_41.280_-79.460_1783124160000","source":"iem","severity":"low","severityValue":25,"timestamp":1783124160000,"latitude":41.28,"longitude":-79.46},{"id":"iem_D_41.190_-80.110_1783121820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783121820000,"latitude":41.19,"longitude":-80.11},{"id":"iem_D_41.250_-79.640_1783124820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783124820000,"latitude":41.25,"longitude":-79.64}] |
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.
Review the area, threshold and delivery channel in your account.
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