This alert expired on 14 May 2026 at 03:15 UTC. It is kept here as a record.
It is the 5th strongest of the 88 detections recorded within 20 km of this point since 17 March 2026. 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: Special Marine Warning issued May 13 at 11:01PM EDT until May 13 at 11:15PM EDT by NWS Mount Holly NJ
An estimated 231,976 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 27, 2026 · score 43 · 12.6 km
- August 3, 2026 · score 43 · 14.4 km
- June 12, 2026 · score 37 · 16.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 86 % 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) | 43 / 100 |
| Our confidence | 86% |
| Coordinates | 39.2470, -75.2050 |
| Nearest City | Bridgeton (20 km) |
| Population Exposed | 232.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-14T03:01:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8008b2b85723cef9f81ee91d50b1fbc682a0dda9.001.1 |
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; Delaware Bay waters south of East Point NJ to Slaughter Beach DE |
| Headline | Special Marine Warning issued May 13 at 11:01PM EDT until May 13 at 11:15PM EDT by NWS Mount Holly NJ |
| Expires | 2026-05-13T23:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 38 |
| Iem Unit | MPH |
| Iem City | New Castle County Airpo |
| Iem County | New Castle |
| Iem State | DE |
| Iem Wfo | PHI |
| MergedSources | [{"id":"iem_M_39.680_-75.610_1778724960000","source":"iem","severity":"low","severityValue":25,"timestamp":1778724960000,"latitude":39.68,"longitude":-75.61}] |
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 Bridgeton?
Calamity.live data shows a weather event with CalamityScore 43/100, near Bridgeton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.