Reported by SPC 172 days ago.
It is the 10th strongest of the 67 detections recorded within 20 km of this point since 16 March 2026. 3 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Wind UNK kt near 1 NW Seven Valleys, York, PA. Barn roof collapse in North Codorus Township. (CTP)
An estimated 335,343 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 17, 2026 · score 43 · 0.0 km
- September 3, 2026 · score 37 · 8.4 km
- August 7, 2026 · score 37 · 11.2 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 43 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 39.8600, -76.7800 |
| Nearest City | York (12 km) |
| Population Exposed | 335.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T16:25:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | 1 NW Seven Valleys |
| County | York |
| State | PA |
| Comments | Barn roof collapse in North Codorus Township. (CTP) |
| Iem TypeSummary | D |
| Iem City | 1 NW Seven Valleys |
| Iem County | York |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Barn roof collapse in North Codorus Township. |
| MergedSources | [{"id":"iem_D_39.860_-76.780_1773678300000","source":"iem","severity":"low","severityValue":25,"timestamp":1773678300000,"latitude":39.86,"longitude":-76.78}] |
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 8 March 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 York?
Calamity.live data shows a weather event with CalamityScore 43/100, near York (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.