This alert expired on 6 June 2026 at 20:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 23 detections recorded within 20 km of this point since 11 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 6 at 4:02PM EDT until June 6 at 4:30PM EDT by NWS State College PA
An estimated 65,310 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 12, 2026 · score 39 · 13.3 km
- March 11, 2026 · score 45 · 15.1 km
- June 15, 2026 · score 39 · 20.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 40.3625, -78.3604 |
| Nearest City | Altoona (18 km) |
| Population Exposed | 65.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T20:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.608211467c4989024222838517635ba6 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lycoming, PA; Sullivan, PA; Tioga, PA; Centre, PA; Clinton, PA; Lycoming, PA; Mifflin, PA; Northumberland, PA; Snyder, PA; Union, PA; Centre, PA; Clearfield, PA; Clinton, PA and 6 more areas |
| Headline | Severe Thunderstorm Warning issued June 6 at 4:02PM EDT until June 6 at 4:30PM EDT by NWS State College PA |
| Expires | 2026-06-06T16:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.608211467c4989024222838517635ba691802e40.001.1","noaa_urn:oid:2.49.0.1.840.0.f8e1b39cfc2ef03ff71957a6fd51a7011efb3e51.001.1","noaa_urn:oid:2.49.0.1.840.0.a0d568190669735c0a7074a1f5f9a3c58750d9f7.001.1","noaa_urn:oid:2.49.0.1.840.0.519ae4218cc601a936dc307f0cf48c8bf5aad1cf.001.1","noaa_urn:oid:2.49.0.1.840.0.56735fa84bfe444b2232418f5ec057f36866ffe1.001.1","noaa_urn:oid:2.49.0.1.840.0.8cb6f88dc961f98d78875db5d8fd4db2e54ad694.001.1","noaa_urn:oid:2.49.0.1.840.0.1b898de203102be455aa8bd0ac5264eae1226315.001.1","noaa_urn:oid:2.49.0.1.840.0.3b8e19dff3980ce64c4bbe8683eecc332d248917.002.1","noaa_urn:oid:2.49.0.1.840.0.0681155c01f0b6b5827a7197900c7417a087da62.001.1"] |
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 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 39/100, near Altoona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.