This alert expired on 12 June 2026 at 04:30 UTC. It is kept here as a record.
It is the 37th strongest of the 65 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 12 at 12:03AM EDT until June 12 at 12:30AM EDT by NWS Upton NY
An estimated 26,899,649 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 21, 2026 · score 46 · 3.2 km
- August 3, 2026 · score 66 · 4.5 km
- August 7, 2026 · score 66 · 7.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 80 % 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) | 46 / 100 |
| Our confidence | 80% |
| Coordinates | 40.8257, -73.6021 |
| Nearest City | Glen Cove (4 km) |
| Population Exposed | 26.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T04:03:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.115ca53735fd80ebe6865bf2531551f7526c2e23.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Nassau, NY |
| Headline | Severe Thunderstorm Warning issued June 12 at 12:03AM EDT until June 12 at 12:30AM EDT by NWS Upton NY |
| Expires | 2026-06-12T00:30:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
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 Glen Cove?
Calamity.live data shows a weather event with CalamityScore 46/100, near Glen Cove (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.