This alert expired on 18 July 2026 at 22:00 UTC. It is kept here as a record.
No stronger detection stands among the 34 recorded within 20 km of this point since 17 March 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued July 18 at 5:48PM EDT until July 18 at 6:00PM EDT by NWS State College PA
An estimated 19,966 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 7, 2026 · score 34 · 10.8 km
- June 6, 2026 · score 39 · 11.8 km
- August 10, 2026 · score 34 · 14.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100, at 79 % 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) | 58 / 100 |
| Our confidence | 79% |
| Coordinates | 40.2200, -78.9800 |
| Nearest City | Johnstown (13 km) |
| Population Exposed | 20.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T21:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f6d9062aa7c8b2a7921b6228b1dfa43e6b845f76.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Somerset, PA |
| Headline | Tornado Warning issued July 18 at 5:48PM EDT until July 18 at 6:00PM EDT by NWS State College PA |
| Expires | 2026-07-18T18:00:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
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.
Calamity.live data shows a weather event with CalamityScore 58/100, near Johnstown (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.