Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 18 July 2026 at 22:45 UTC. It is kept here as a record.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 6:19PM EDT until July 18 at 6:45PM EDT by NWS Mount Holly NJ
Urban PEI: 56,020 within a heuristic 50 km radius; not unique people.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 39 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 38.8460, -75.7517 |
| Nearest City | Easton (30 km) |
| Urban exposure index (PEI) | 56.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T22:19:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.60c9992bd3e9e5dc10d088be0ce218f6 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-18T22:19:00.000Z.
First archived: 2026-07-18T22:21:39.181Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
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; Tidal Potomac from Indian Head to Cobb Island MD; Tidal Potomac from Cobb Island MD to Smith Point VA; Chesapeake Bay from Drum Point MD to Smith Point VA; Tidal Potomac from Cobb Island MD to Smith Point VA; Tangier Sound and the inland waters surrounding Bloodsworth Island and 3 more areas |
| Headline | Special Marine Warning issued July 18 at 6:19PM EDT until July 18 at 6:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-18T18:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.60c9992bd3e9e5dc10d088be0ce218f6af6a5ac3.001.1","noaa_urn:oid:2.49.0.1.840.0.c6f1b74c7cb2521b2941ffcd212f69029ec39332.001.1","noaa_urn:oid:2.49.0.1.840.0.24d7b5618f1033116e33fa0dda577d409453f86a.001.1","noaa_urn:oid:2.49.0.1.840.0.fb8cad316fc5ed5047c54c76b45e8fdcf56f3229.001.1","noaa_urn:oid:2.49.0.1.840.0.740605d30fc3cbb1a54cb70e9428769ab1d0640b.001.1","noaa_urn:oid:2.49.0.1.840.0.8e1f44830c14613d19c4f48435bce76e1971071d.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 8 March 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.
Review the area, threshold and delivery channel in your account.
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