Right now
The most recent data we hold from NOAA arrived 13 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 19 May 2026 at 22:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 65 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 5:24PM EDT until May 19 at 6:15PM EDT by NWS Boston/Norton MA
An estimated 1,082,242 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 19, 2026 · score 52 · 8.4 km
- May 19, 2026 · score 52 · 10.5 km
- July 3, 2026 · score 52 · 10.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 42.0732, -72.1302 |
| Nearest City | Southbridge (8 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T21:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.be97cd853dbfe7d9bf7e67a886898847 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hartford, CT; Tolland, CT; Windham, CT; Franklin, MA; Hampden, MA; Hampshire, MA; Worcester, MA; Hartford, CT and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 5:24PM EDT until May 19 at 6:15PM EDT by NWS Boston/Norton MA |
| Expires | 2026-05-19T18:15:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.be97cd853dbfe7d9bf7e67a8868988472dc5f164.001.1","noaa_urn:oid:2.49.0.1.840.0.0fdeaee4c6f1d52b7cbffc08f2a8cbf65058b777.001.1","noaa_urn:oid:2.49.0.1.840.0.28b5d1822306385a511fc0bb13dc7671333cd66f.001.1","noaa_urn:oid:2.49.0.1.840.0.b744fb453237a86f22148d92d860cb21bd19fb6d.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 8 March 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 Southbridge?
Calamity.live data shows a weather event with CalamityScore 52/100, near Southbridge (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.