This alert expired on 3 July 2026 at 04:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 46 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 11:24PM EDT until July 3 at 12:00AM EDT by NWS Boston/Norton MA
An estimated 1,032,731 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 30, 2026 · score 52 · 13.5 km
- May 19, 2026 · score 52 · 14.5 km
- July 28, 2026 · score 52 · 17.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 85 % 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) | 52 / 100 |
| Our confidence | 85% |
| Coordinates | 42.1620, -72.1760 |
| Nearest City | Palmer (13 km) |
| Population Exposed | 1.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T03:24:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ea960d3d6ee5b5c2404907980a13ff2809d53bb6.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hampden, MA; Hampshire, MA; Worcester, MA |
| Headline | Severe Thunderstorm Warning issued July 2 at 11:24PM EDT until July 3 at 12:00AM EDT by NWS Boston/Norton MA |
| Expires | 2026-07-03T00:00:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Southampton |
| Iem County | Hampshire |
| Iem State | MA |
| Iem Wfo | BOX |
| Iem Remark | Tree down on wires. |
| MergedSources | [{"id":"iem_D_42.230_-72.730_1783046700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783046700000,"latitude":42.23,"longitude":-72.73}] |
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 Palmer?
Calamity.live data shows a weather event with CalamityScore 52/100, near Palmer (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.