This alert expired on 16 March 2026 at 17:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 12 detections recorded within 20 km of this point since 16 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 12:00PM EDT until March 16 at 1:00PM EDT by NWS Wilmington NC
Nearby, since 16 March 2026
- August 4, 2026 · score 34 · 11.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 58 % 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) | 22 / 100 |
| Our confidence | 58% |
| Coordinates | 33.4088, -78.3381 |
| Nearest City | North Myrtle Beach (56 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-16T16:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.a1fdcbc5404ed13c8b6c05526864d04f |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Cape Fear NC to Little River Inlet SC out 20 nm; Coastal waters from Little River Inlet to Murrells Inlet SC out 20 nm; Waters from Murrells Inlet NC to South Santee River SC from 20 to 40 nm; Waters from Cape Fear NC to Little River Inlet SC from 20 to 40 nm; Waters from Little River Inlet to Murrells Inlet SC from 20 to 40 nm; Waters from Murrells Inlet NC to South Santee River SC from 20 to 40 nm |
| Headline | Special Marine Warning issued March 16 at 12:00PM EDT until March 16 at 1:00PM EDT by NWS Wilmington NC |
| Expires | 2026-03-16T13:00:00-04:00 |
| SenderName | NWS Wilmington NC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a1fdcbc5404ed13c8b6c05526864d04f9c5be221.001.1","noaa_urn:oid:2.49.0.1.840.0.c8eb208473977bbb843018f88823c09cf369d539.001.1"] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.