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.
2 other detections within 20 km in the last 24 hours, the nearest 17 km from here.
This alert expired on 13 September 2026 at 09:30 UTC. It is kept here as a record.
It is the 23rd strongest of the 33 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 13 at 4:37AM EDT until September 13 at 5:30AM EDT by NWS Mount Holly NJ
Nearby, since 17 March 2026
- June 13, 2026 · score 34 · 22.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 38.3339, -74.9356 |
| Nearest City | Salisbury (58 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-13T08:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.efaa7dfaae144196fb5241233ee7e792f9d84a73.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Cape May NJ to Cape Henlopen DE out 20 NM; Coastal waters from Cape Henlopen to Fenwick Island DE out 20 NM; Waters from Cape May NJ to Fenwick Island DE from 20 to 60 NM; Coastal waters from Fenwick Island DE to Chincoteague VA out 20 NM; Waters from Fenwick Island DE to Chintoteague VA from 20 to 60 NM |
| Headline | Special Marine Warning issued September 13 at 4:37AM EDT until September 13 at 5:30AM EDT by NWS Mount Holly NJ |
| Expires | 2026-09-13T05:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.efaa7dfaae144196fb5241233ee7e792f9d84a73.001.1","noaa_urn:oid:2.49.0.1.840.0.0b8428c2b6e577903189fe0953fb3284f008d932.001.1"] |
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.
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