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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 March 2026 at 05:00 UTC. It is kept here as a record.
No stronger detection stands among the 30 recorded within 20 km of this point since 17 March 2026 — 8 others scored the same.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 10:58PM EDT until March 17 at 1:00AM EDT by NWS Mount Holly NJ
An estimated 32,899 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 13, 2026 · score 34 · 19.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 83 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 34 / 100 |
| Our confidence | 83% |
| Coordinates | 38.3326, -75.0335 |
| Nearest City | Salisbury (49 km) |
| Population Exposed | 32.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T02:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.451caf8078dde7955d220ea2e675b785 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm; Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm; Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40 nm; Waters from Little Egg Inlet NJ to Great Egg Inlet NJ out 20 to 40 nm from 20 to 40 NM; Waters from Great Egg Inlet NJ to Cape May NJ out 20 to 40 nm; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm; 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 Great Egg Inlet NJ to Cape May NJ out 20 to 40 nm; Waters from Cape May NJ to Fenwick Island DE out 20 to 40 nm; Delaware Bay waters north of East Point NJ to Slaughter Beach DE; Delaware Bay waters south of East Point NJ to Slaughter Beach DE and 2 more areas |
| Headline | Special Marine Warning issued March 16 at 10:58PM EDT until March 17 at 1:00AM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-17T01:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.451caf8078dde7955d220ea2e675b785bd058744.001.1","noaa_urn:oid:2.49.0.1.840.0.521b61deaada1238738ff446dcad23d6912124e7.001.1","noaa_urn:oid:2.49.0.1.840.0.910705de11a5081a426f445d1445ca2b3525abcc.001.1","noaa_urn:oid:2.49.0.1.840.0.f320ccb9c36f8ad8cda3cd1c34ff645487876356.001.1","noaa_urn:oid:2.49.0.1.840.0.0165425da867df3da90518602d964f1532d26364.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 1 SE Indian Beach |
| Iem County | ANZ455 |
| Iem State | DE |
| Iem Wfo | PHI |
| Iem Remark | Dewey Beach mesonet. |
| MergedSources | [{"id":"iem_M_38.680_-75.060_1773697500000","source":"iem","severity":"low","severityValue":25,"timestamp":1773697500000,"latitude":38.68,"longitude":-75.06}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.