This alert expired on 16 July 2026 at 21:30 UTC. It is kept here as a record.
No stronger detection stands among the 106 recorded within 20 km of this point since 16 March 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 16 at 5:14PM EDT until July 16 at 5:30PM EDT by NWS Gray ME
An estimated 1,764,575 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 26, 2026 · score 52 · 5.8 km
- July 16, 2026 · score 52 · 6.4 km
- June 26, 2026 · score 52 · 11.6 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 81 % 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 | 81% |
| Coordinates | 42.8074, -71.3779 |
| Nearest City | Nashua (9 km) |
| Population Exposed | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-16T21:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.bfbf991a8aa97dc7c793b4c28adf7277 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cheshire, NH; Hillsborough, NH; Rockingham, NH; Essex, MA |
| Headline | Severe Thunderstorm Warning issued July 16 at 5:14PM EDT until July 16 at 5:30PM EDT by NWS Gray ME |
| Expires | 2026-07-16T17:30:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bfbf991a8aa97dc7c793b4c28adf72772628e607.001.1","noaa_urn:oid:2.49.0.1.840.0.bf1d57bae5c2b4e79ef3097b9abae4ae9d23b3fd.001.1","noaa_urn:oid:2.49.0.1.840.0.0ca53203be445f5c967de837245e1ef6c6a7aa29.001.1"] |
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 Nashua?
Calamity.live data shows a weather event with CalamityScore 52/100, near Nashua (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.