Right now
The most recent data we hold from NOAA arrived 11 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 May 2026 at 20:15 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 11 May 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 11 at 3:15PM EDT until May 11 at 4:15PM EDT by NWS Wilmington NC
An estimated 66,566 people live within 50 km of this point.
Nearby, since 11 May 2026
- August 10, 2026 · score 39 · 14.5 km
- June 13, 2026 · score 32 · 17.7 km
- July 11, 2026 · score 39 · 26.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 86 % 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) | 39 / 100 |
| Our confidence | 86% |
| Coordinates | 33.4714, -78.7071 |
| Nearest City | Myrtle Beach (30 km) |
| Population Exposed | 66.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-11T19:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.db7fe0d9bc492a7ef5efb9e4ae331eec |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 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 |
| Headline | Special Marine Warning issued May 11 at 3:15PM EDT until May 11 at 4:15PM EDT by NWS Wilmington NC |
| Expires | 2026-05-11T16:15:00-04:00 |
| SenderName | NWS Wilmington NC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.db7fe0d9bc492a7ef5efb9e4ae331eecb0eb1cc6.001.1","noaa_urn:oid:2.49.0.1.840.0.08a4e776aac4b41f466520ddb65997db7ddb183a.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.
Want to know when something happens near Myrtle Beach?
Calamity.live data shows a weather event with CalamityScore 39/100, near Myrtle Beach (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.