This alert expired on 26 June 2026 at 21:45 UTC. It is kept here as a record.
It is the 6th strongest of the 34 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 26 at 5:04PM EDT until June 26 at 5:45PM EDT by NWS Gray ME
An estimated 317,505 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 15, 2026 · score 43 · 8.7 km
- June 18, 2026 · score 43 · 17.1 km
- July 16, 2026 · score 43 · 26.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Our confidence | 78% |
| Coordinates | 43.2004, -71.7071 |
| Nearest City | Concord (14 km) |
| Population Exposed | 317.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-26T21:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.47a2699ae41227401718442843377c81 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Merrimack, NH; Rockingham, NH; Strafford, NH; Merrimack, NH; Sullivan, NH |
| Headline | Severe Thunderstorm Warning issued June 26 at 5:04PM EDT until June 26 at 5:45PM EDT by NWS Gray ME |
| Expires | 2026-06-26T17:45:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.47a2699ae41227401718442843377c815803d408.001.1","noaa_urn:oid:2.49.0.1.840.0.4ab4f68d60ed5af37303788d89b67e94d7f447d6.001.1"] |
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.
Want to know when something happens near Concord?
Calamity.live data shows a weather event with CalamityScore 37/100, near Concord (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.