Reported by SPC today.
It is the 123rd strongest of the 221 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind UNK kt near West Caln Twp, Chester, PA. EM reports trees and wires down in West Caln. Time estimated. (PHI)
An estimated 616,370 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 27, 2026 · score 48 · 8.4 km
- August 31, 2026 · score 48 · 8.5 km
- July 28, 2026 · score 48 · 8.6 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 41 out of 100, at 83 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 41 / 100 |
| Our confidence | 83% |
| Coordinates | 40.0100, -75.8600 |
| Nearest City | West Chester (22 km) |
| Population Exposed | 616.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T04:54:46.896Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | West Caln Twp |
| County | Chester |
| State | PA |
| Comments | EM reports trees and wires down in West Caln. Time estimated. (PHI) |
| Iem TypeSummary | D |
| Iem City | West Caln Twp |
| Iem County | Chester |
| Iem State | PA |
| Iem Wfo | PHI |
| Iem Remark | EM reports trees and wires down in West Caln. Time estimated. |
| MergedSources | [{"id":"iem_D_40.010_-75.860_1788306780000","source":"iem","severity":"low","severityValue":25,"timestamp":1788306780000,"latitude":40.01,"longitude":-75.86}] |
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 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 West Chester?
Calamity.live data shows a weather event with CalamityScore 41/100, near West Chester (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.