This alert expired on 19 May 2026 at 22:00 UTC. It is kept here as a record.
It is the 17th strongest of the 83 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 May 19 at 5:29PM EDT until May 19 at 6:00PM EDT by NWS Boston/Norton MA
An estimated 884,476 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 7, 2026 · score 48 · 4.0 km
- June 18, 2026 · score 52 · 6.5 km
- June 7, 2026 · score 48 · 7.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 85% |
| Coordinates | 42.1947, -71.8893 |
| Nearest City | Auburn (4 km) |
| Population Exposed | 884.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T21:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6281f34df2248d07a4bb606452de3af4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Middlesex, MA; Norfolk, MA; Worcester, MA; Hartford, CT; Tolland, CT; Windham, CT; Franklin, MA; Hampden, MA; Hampshire, MA; Worcester, MA |
| Headline | Severe Thunderstorm Warning issued May 19 at 5:29PM EDT until May 19 at 6:00PM EDT by NWS Boston/Norton MA |
| Expires | 2026-05-19T18:00:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6281f34df2248d07a4bb606452de3af456af8622.001.1","noaa_urn:oid:2.49.0.1.840.0.be97cd853dbfe7d9bf7e67a8868988472dc5f164.001.1","noaa_urn:oid:2.49.0.1.840.0.0fdeaee4c6f1d52b7cbffc08f2a8cbf65058b777.001.1"] |
| Google News RssFeed | weather |
| Google News SourceName | WCVB |
| MergedSources | [{"id":"gnews_weather_494224_118","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779207960000,"latitude":42.36,"longitude":-71.06}] |
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 Auburn?
Calamity.live data shows a weather event with CalamityScore 48/100, near Auburn (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.