This alert expired on 4 July 2026 at 01:45 UTC. It is kept here as a record.
It is the 5th strongest of the 34 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 8:56PM EDT until July 3 at 9:45PM EDT by NWS Cleveland OH
An estimated 786,608 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 5, 2026 · score 72 · 11.6 km
- July 4, 2026 · score 48 · 14.4 km
- July 4, 2026 · score 48 · 17.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 48 / 100 |
| Our confidence | 85% |
| Coordinates | 41.0375, -81.0494 |
| Nearest City | Alliance (14 km) |
| Population Exposed | 786.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.eb583abd93e4a652eaf5d87a5f22927e |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ashtabula, OH; Geauga, OH; Lake, OH; Trumbull, OH; Armstrong, PA; Clarion, PA; Indiana, PA; Jefferson, PA; Ashland, OH; Crawford, OH; Holmes, OH; Knox, OH; Marion, OH; Morrow, OH; Richland, OH; Wayne, OH |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:56PM EDT until July 3 at 9:45PM EDT by NWS Cleveland OH |
| Expires | 2026-07-03T21:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.eb583abd93e4a652eaf5d87a5f22927eb0e528c8.001.1","noaa_urn:oid:2.49.0.1.840.0.b4fb03f8c27c9c088f28d6693d81c711e1e7b462.002.1","noaa_urn:oid:2.49.0.1.840.0.7653c1e3dbe2e1707979fa87f0038bd5c06d60e4.001.1"] |
| Iem TypeSummary | D |
| Iem City | 1 E Sharon |
| Iem County | Mercer |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | Wires down on Kimberly Road and Bentley Ave. |
| MergedSources | [{"id":"iem_D_41.240_-80.490_1783120620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783120620000,"latitude":41.24,"longitude":-80.49}] |
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 10 February 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.
Want to know when something happens near Alliance?
Calamity.live data shows a weather event with CalamityScore 48/100, near Alliance (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.