This alert expired on 7 June 2026 at 02:45 UTC. It is kept here as a record.
It is the 16th strongest of the 75 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 19 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 6 at 9:49PM EDT until June 6 at 10:45PM EDT by NWS Boston/Norton MA
An estimated 906,294 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 29, 2026 · score 52 · 4.9 km
- June 7, 2026 · score 48 · 6.3 km
- May 19, 2026 · score 48 · 7.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 80% |
| Coordinates | 42.2560, -71.8660 |
| Nearest City | Worcester (5 km) |
| Population Exposed | 906.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-07T01:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5aec5955335974152e8315ccf5a7515ad1f6321c.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hampden, MA; Middlesex, MA; Norfolk, MA; Worcester, MA |
| Headline | Severe Thunderstorm Warning issued June 6 at 9:49PM EDT until June 6 at 10:45PM EDT by NWS Boston/Norton MA |
| Expires | 2026-06-06T22:45:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
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 Worcester?
Calamity.live data shows a weather event with CalamityScore 48/100, near Worcester (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.