Right now
The most recent data we hold from SPC arrived 21 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by SPC 172 days ago.
It is the 60th strongest of the 328 detections recorded within 20 km of this point since 17 March 2026. 39 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Wind UNK kt near Glenmoore, Chester, PA. Tree down. Time estimated from radar. (PHI)
An estimated 738,528 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 22, 2026 · score 72 · 3.0 km
- June 22, 2026 · score 43 · 10.9 km
- September 2, 2026 · score 46 · 11.2 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 48 out of 100, at 78 % 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) | 48 / 100 |
| Our confidence | 78% |
| Coordinates | 40.0900, -75.7700 |
| Nearest City | West Chester (20 km) |
| Population Exposed | 738.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T02:10:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | Glenmoore |
| County | Chester |
| State | PA |
| Comments | Tree down. Time estimated from radar. (PHI) |
| Iem TypeSummary | D |
| Iem City | Glenmoore |
| Iem County | Chester |
| Iem State | PA |
| Iem Wfo | PHI |
| Iem Remark | Tree down. Time estimated from radar. |
| MergedSources | [{"id":"iem_D_40.090_-75.770_1773713400000","source":"iem","severity":"low","severityValue":25,"timestamp":1773713400000,"latitude":40.09,"longitude":-75.77}] |
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 West Chester?
Calamity.live data shows a weather event with CalamityScore 48/100, near West Chester (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.