This alert expired on 22 July 2026 at 00:30 UTC. It is kept here as a record.
It is the 4th strongest of the 50 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 21 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued July 21 at 8:04PM EDT until July 21 at 8:30PM EDT by NWS Pittsburgh PA
An estimated 236,998 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 21, 2026 · score 43 · 14.1 km
- June 25, 2026 · score 67 · 15.5 km
- August 2, 2026 · score 37 · 17.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 80% |
| Coordinates | 40.6758, -80.5750 |
| Nearest City | Weirton (28 km) |
| Population Exposed | 237.0K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-07-22T00:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.f010d3fe5bb43e1b9b43c315d3038810 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carroll, OH; Butler, PA |
| Headline | Tornado Warning issued July 21 at 8:04PM EDT until July 21 at 8:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-21T20:30:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f010d3fe5bb43e1b9b43c315d303881015aaf4f3.001.1","noaa_urn:oid:2.49.0.1.840.0.787fda24ae84174b2fa9d513fa2c2e01f2c6b08a.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Weirton?
Calamity.live data shows a weather event with CalamityScore 67/100, near Weirton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.