This alert expired on 3 July 2026 at 04:00 UTC. It is kept here as a record.
It is the 5th strongest of the 97 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 10:56PM EDT until July 3 at 12:00AM EDT by NWS Boston/Norton MA
An estimated 838,808 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 8, 2026 · score 52 · 10.7 km
- August 8, 2026 · score 52 · 23.4 km
- August 8, 2026 · score 52 · 24.4 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 78 % 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 | 78% |
| Coordinates | 42.2147, -72.6670 |
| Nearest City | Holyoke (4 km) |
| Population Exposed | 838.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T02:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ccb2406fa2e65e61132630e107b8bcb0 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Franklin, MA; Hampden, MA; Hampshire, MA; Worcester, MA; Hampden, MA; Hampshire, MA |
| Headline | Severe Thunderstorm Warning issued July 2 at 10:56PM 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 |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ccb2406fa2e65e61132630e107b8bcb04563ee1c.001.1","noaa_urn:oid:2.49.0.1.840.0.5ee65522c49fe81f54d55788c3d25a8cd79865aa.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 48/100, near Holyoke (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.