Right now
The most recent data we hold from NOAA arrived 9 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.
This alert expired on 6 June 2026 at 21:30 UTC. It is kept here as a record.
It is the 19th strongest of the 40 detections recorded within 20 km of this point since 6 June 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 6 at 4:30PM EDT until June 6 at 5:30PM EDT by NWS State College PA
An estimated 20,691 people live within 50 km of this point.
Nearby, since 6 June 2026
- August 28, 2026 · score 39 · 10.1 km
- August 27, 2026 · score 39 · 10.1 km
- September 3, 2026 · score 28 · 11.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 80 % 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) | 34 / 100 |
| Our confidence | 80% |
| Coordinates | 40.1474, -77.8093 |
| Nearest City | Chambersburg (26 km) |
| Population Exposed | 20.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T20:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.78537b097dabf6e3fb42cdfb1578dc30 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cumberland, PA; Franklin, PA; Frederick, MD; Washington, MD; Frederick, VA; Berkeley, WV; Hampshire, WV; Jefferson, WV; Morgan, WV; Columbia, PA; Montour, PA; Northumberland, PA; Schuylkill, PA; Snyder, PA; Union, PA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 6 at 4:30PM EDT until June 6 at 5:30PM EDT by NWS State College PA |
| Expires | 2026-06-06T17:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.78537b097dabf6e3fb42cdfb1578dc30e040a861.001.1","noaa_urn:oid:2.49.0.1.840.0.3e928b1e8f8bf080908fdd3ccb50268c3d27b77c.001.1","noaa_urn:oid:2.49.0.1.840.0.8ce50d6c8b6f5ea0c562d9e9219ac2eca07fa0b6.001.1","noaa_urn:oid:2.49.0.1.840.0.60e6b610bb371fda5cc61b7fabdd53ad23666835.001.1","noaa_urn:oid:2.49.0.1.840.0.8cb6f88dc961f98d78875db5d8fd4db2e54ad694.001.1","noaa_urn:oid:2.49.0.1.840.0.a0d568190669735c0a7074a1f5f9a3c58750d9f7.001.1"] |
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 Chambersburg?