This alert expired on 13 August 2026 at 19:30 UTC. It is kept here as a record.
No stronger detection stands among the 8 recorded within 20 km of this point since 17 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 13 at 2:55PM EDT until August 13 at 3:30PM EDT by NWS Boston/Norton MA
An estimated 603,704 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 13, 2026 · score 43 · 13.2 km
- July 21, 2026 · score 41 · 21.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 83 % 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) | 48 / 100 |
| Our confidence | 83% |
| Coordinates | 41.7622, -70.6644 |
| Nearest City | Fairhaven (24 km) |
| Population Exposed | 603.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T18:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.359890e28a7c51e40f5530231e50954074478e36.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Barnstable, MA; Plymouth, MA |
| Headline | Severe Thunderstorm Warning issued August 13 at 2:55PM EDT until August 13 at 3:30PM EDT by NWS Boston/Norton MA |
| Expires | 2026-08-13T15:30:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| Google News RssFeed | weather |
| Google News SourceName | Boston 25 News |
| MergedSources | [{"id":"gnews_weather_496290_217","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786646483000,"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 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 Fairhaven?
Calamity.live data shows a weather event with CalamityScore 48/100, near Fairhaven (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.