This alert expired on 11 June 2026 at 23:45 UTC. It is kept here as a record.
It is the 177th strongest of the 230 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 6:57PM EDT until June 11 at 7:45PM EDT by NWS State College PA
An estimated 295,711 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 10, 2026 · score 43 · 4.7 km
- July 18, 2026 · score 43 · 6.9 km
- July 21, 2026 · score 41 · 12.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 80 % 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) | 37 / 100 |
| Our confidence | 80% |
| Coordinates | 39.3107, -77.8398 |
| Nearest City | Martinsburg (20 km) |
| Population Exposed | 295.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T22:57:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4e09187da0cd2227be4e4a2c82025233 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Columbia, PA; Lycoming, PA; Sullivan, PA; Juniata, PA; Perry, PA; Snyder, PA; Union, PA; Adams, PA; Cumberland, PA; Franklin, PA; Perry, PA and 11 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 6:57PM EDT until June 11 at 7:45PM EDT by NWS State College PA |
| Expires | 2026-06-11T19:45:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4e09187da0cd2227be4e4a2c820252334ce5d3e7.001.1","noaa_urn:oid:2.49.0.1.840.0.af6789256413abc663a7248d370156f20cea1acb.002.1","noaa_urn:oid:2.49.0.1.840.0.eee87f63ec6b10ba72b02b803f1d968acb962e85.002.1","noaa_urn:oid:2.49.0.1.840.0.396a0483b7de1f9f6a4db5b54a0c118d2746033c.001.1","noaa_urn:oid:2.49.0.1.840.0.6f635206248ff6d1436c27396514282ad837e374.001.1","noaa_urn:oid:2.49.0.1.840.0.437b3221e14c417af1d8eda4178d8b2ac2f9cfff.001.1","noaa_urn:oid:2.49.0.1.840.0.895fcc29f21fc3726cf436c8ff668994a2063544.002.1","noaa_urn:oid:2.49.0.1.840.0.05f4946e63f672141b6b929fe3cae724751f702a.001.1","noaa_urn:oid:2.49.0.1.840.0.87ad2861077165afd3aeb9b86a89576a090ff0f9.001.1","noaa_urn:oid:2.49.0.1.840.0.9f5dc6e017d2ebda198cde69931a5b5205164bda.001.1","noaa_urn:oid:2.49.0.1.840.0.c67226efbb9e0558e3f83222998ff8c97b177dd4.001.1","noaa_urn:oid:2.49.0.1.840.0.703d889323dbaa6edc7894d3178831c116612052.001.1","noaa_urn:oid:2.49.0.1.840.0.fd11ce78ea1865669d07462361c95f4f648fb026.001.1","noaa_urn:oid:2.49.0.1.840.0.8d5d8678fe8c190c77f68f996a940296c26f9ba6.002.1"] |
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 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.
Calamity.live data shows a weather event with CalamityScore 37/100, near Martinsburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.