This alert expired on 8 August 2026 at 23:30 UTC. It is kept here as a record.
It is the 4th strongest of the 82 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 53 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 8 at 7:02PM EDT until August 8 at 7:30PM EDT by NWS Boston/Norton MA
An estimated 4,993,143 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 30, 2026 · score 52 · 2.7 km
- June 18, 2026 · score 64 · 2.7 km
- May 30, 2026 · score 52 · 2.7 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % 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 | 91% |
| Coordinates | 42.2174, -71.5236 |
| Nearest City | Ashland (7 km) |
| Population Exposed | 5.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-08T23:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.f0cc13e7bbd75d98810ef121d9b7bb5a |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hartford, CT; Tolland, CT; Windham, CT; Essex, MA; Middlesex, MA |
| Headline | Severe Thunderstorm Warning issued August 8 at 7:02PM EDT until August 8 at 7:30PM EDT by NWS Boston/Norton MA |
| Expires | 2026-08-08T19:30:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f0cc13e7bbd75d98810ef121d9b7bb5af3fea606.001.1","noaa_urn:oid:2.49.0.1.840.0.4a6d69c7cf5a92631d7b7bb1edb357a13e634e95.001.1"] |
| Google News RssFeed | weather |
| Google News SourceName | Boston 25 News |
| MergedSources | [{"id":"gnews_weather_496173_196","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786222825000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_496170_197","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786213351000,"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 Ashland?
Calamity.live data shows a weather event with CalamityScore 52/100, near Ashland (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.