This alert expired on 18 June 2026 at 13:00 UTC. It is kept here as a record.
It is the strongest of the 21 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 11 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 18 at 8:44AM EDT until June 18 at 9:00AM EDT by NWS State College PA
An estimated 30,075 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 10, 2026 · score 34 · 4.5 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 78 % 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 | 78% |
| Coordinates | 42.0718, -78.9115 |
| Nearest City | Jamestown (27 km) |
| Population Exposed | 30.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T12:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.b1ae4368ce88d9801d713363b4b0e9a2 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Warren, PA; Cattaraugus, NY |
| Headline | Tornado Warning issued June 18 at 8:44AM EDT until June 18 at 9:00AM EDT by NWS State College PA |
| Expires | 2026-06-18T09:00:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b1ae4368ce88d9801d713363b4b0e9a2dfa21608.001.1","noaa_urn:oid:2.49.0.1.840.0.e4f4fbd82161d3d97052cf9dfedab3ddd7656898.001.1"] |
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 Jamestown?
Calamity.live data shows a weather event with CalamityScore 58/100, near Jamestown (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.