This alert expired on 22 July 2026 at 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 85 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 20 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued July 21 at 7:46PM EDT until July 21 at 8:00PM EDT by NWS Pittsburgh PA
An estimated 188,057 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 4, 2026 · score 43 · 4.0 km
- July 18, 2026 · score 43 · 4.6 km
- July 21, 2026 · score 67 · 6.2 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 | 40.9060, -80.1550 |
| Nearest City | New Castle (19 km) |
| Population Exposed | 188.1K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-07-21T23:46:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.a8026cab544a7dea629e522a73fdd2e8 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Butler, PA; Lawrence, PA; Carroll, OH; Forest, PA; Jefferson, PA |
| Headline | Tornado Warning issued July 21 at 7:46PM EDT until July 21 at 8:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-21T20:00:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a8026cab544a7dea629e522a73fdd2e8fd197e13.001.1","noaa_urn:oid:2.49.0.1.840.0.276f8fa611e3eac6a4b34c2437bf7333d5a482f0.001.1","noaa_urn:oid:2.49.0.1.840.0.b6182288dbae3ab82cd20c257aad340a1464a556.002.1"] |
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 New Castle?
Calamity.live data shows a weather event with CalamityScore 67/100, near New Castle (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.