Right now
The most recent data we hold from NOAA arrived 9 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 11 July 2026 at 20:45 UTC. It is kept here as a record.
It is the 4th strongest of the 12 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 11 at 4:03PM EDT until July 11 at 4:45PM EDT by NWS Wilmington NC
Urban PEI: 46,614 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 6, 2026 · score 32 · 12.2 km
- May 28, 2026 · score 34 · 12.9 km
- August 12, 2026 · score 39 · 14.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 33.7416, -78.3747 |
| Nearest City | North Myrtle Beach (30 km) |
| Urban exposure index (PEI) | 46.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-11T20:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.ea1f087316230581f81585cc39267807 |
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: 2026-07-11T20:03:00.000Z.
First archived: 2026-07-11T20:15:11.148Z. 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 | 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; Coastal waters from Murrells Inlet to South Santee River SC out 20 NM; Coastal waters from Surf City to Cape Fear NC out 20 nm; Coastal waters from Cape Fear NC to Little River Inlet SC out 20 NM; Waters from Surf City NC to Little River Inlet SC from 20 to 60 NM |
| Headline | Special Marine Warning issued July 11 at 4:03PM EDT until July 11 at 4:45PM EDT by NWS Wilmington NC |
| Expires | 2026-07-11T16:45:00-04:00 |
| SenderName | NWS Wilmington NC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ea1f087316230581f81585cc3926780759683af2.001.1","noaa_urn:oid:2.49.0.1.840.0.c9b18f2d21d9e669134e4c4d2080bf8030b9507f.001.1","noaa_urn:oid:2.49.0.1.840.0.eb9675dd63851ecb4c72d759438bb5ae979e69f7.001.1"] |
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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