Right now
The most recent data we hold from NOAA arrived 1 minute 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 May 2026 at 21:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 16 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 11 at 3:56PM EDT until May 11 at 5:15PM EDT by NWS Wilmington NC
Nearby, since 16 March 2026
- March 16, 2026 · score 34 · 20.5 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % 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 | 66% |
| Coordinates | 33.5014, -78.2255 |
| Nearest City | North Myrtle Beach (55 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-11T19:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.74f85a38eab6fba07b60df50881a4504 |
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; Waters from Surf City NC to Little River Inlet SC from 20 to 60 NM; Waters from Little River Inlet SC to South Santee River SC from 20 to 60 NM; 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 Surf City NC to Little River Inlet SC from 20 to 60 NM; Waters from Little River Inlet SC to South Santee River SC from 20 to 60 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; Coastal waters from Little River Inlet to Murrells Inlet SC out 20 NM and 1 more areas |
| Headline | Special Marine Warning issued May 11 at 3:56PM EDT until May 11 at 5:15PM EDT by NWS Wilmington NC |
| Expires | 2026-05-11T17:15:00-04:00 |
| SenderName | NWS Wilmington NC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.74f85a38eab6fba07b60df50881a45049c3289d2.001.1","noaa_urn:oid:2.49.0.1.840.0.8a91bfa5e19e484c27c5b4741698cc5328ca5753.001.1","noaa_urn:oid:2.49.0.1.840.0.046239adc18ad87b19f717af71604eca7b5951eb.001.1","noaa_urn:oid:2.49.0.1.840.0.db7fe0d9bc492a7ef5efb9e4ae331eecb0eb1cc6.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 ESE Forestbrook |
| Iem County | Horry |
| Iem State | SC |
| Iem Wfo | ILM |
| Iem Remark | Semi-trailer blown over |
| MergedSources | [{"id":"iem_D_33.710_-78.930_1778523300000","source":"iem","severity":"low","severityValue":25,"timestamp":1778523300000,"latitude":33.71,"longitude":-78.93}] |
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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