This alert expired on 18 June 2026 at 15:30 UTC. It is kept here as a record.
It is the 47th strongest of the 201 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 15 June 2026. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 18 at 10:44AM EDT until June 18 at 11:30AM EDT by NWS Mount Holly NJ
An estimated 948,518 people live within 50 km of this point.
Nearby, since 11 March 2026
- June 15, 2026 · score 48 · 2.0 km
- August 8, 2026 · score 52 · 4.5 km
- July 5, 2026 · score 48 · 4.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 79 % 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) | 48 / 100 |
| Our confidence | 79% |
| Coordinates | 39.5493, -75.4327 |
| Nearest City | Bear (21 km) |
| Population Exposed | 948.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T14:44:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.88e1c8c908cb03a300a2a330108f1d03c6129385.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Delaware Bay waters north of East Point NJ to Slaughter Beach DE |
| Headline | Special Marine Warning issued June 18 at 10:44AM EDT until June 18 at 11:30AM EDT by NWS Mount Holly NJ |
| Expires | 2026-06-18T11:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| 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.
Calamity.live data shows a weather event with CalamityScore 48/100, near Bear (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.