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 13 August 2026 at 19:30 UTC. It is kept here as a record.
It is the 5th strongest of the 15 detections recorded within 20 km of this point since 30 April 2026. The last comparable one was on 10 August 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 13 at 2:54PM EDT until August 13 at 3:30PM EDT by NWS Wilmington NC
Nearby, since 30 April 2026
- August 10, 2026 · score 22 · 8.3 km
- July 11, 2026 · score 22 · 11.7 km
- August 3, 2026 · score 28 · 12.1 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 68 % 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 | 68% |
| Coordinates | 33.2144, -79.1422 |
| Nearest City | Socastee (53 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-13T18:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f688b8f1526832fc0d5a3cfe12a16744d0bffdc4.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Murrells Inlet to South Santee River SC out 20 NM |
| Headline | Special Marine Warning issued August 13 at 2:54PM EDT until August 13 at 3:30PM EDT by NWS Wilmington NC |
| Expires | 2026-08-13T15:30:00-04:00 |
| SenderName | NWS Wilmington NC |
| HasExactCoords | true |
| Iem TypeSummary | I |
| Iem Magnitude | 113 |
| Iem Unit | F |
| Iem City | 2 NNW Garris Landing |
| Iem County | Charleston |
| Iem State | SC |
| Iem Wfo | CHS |
| Iem Remark | Wambaw RAWS site reported a max heat index of 113. |
| MergedSources | [{"id":"iem_I_32.980_-79.800_1786643520000","source":"iem","severity":"low","severityValue":25,"timestamp":1786643520000,"latitude":32.98,"longitude":-79.8},{"id":"iem_I_33.160_-79.830_1786633980000","source":"iem","severity":"low","severityValue":25,"timestamp":1786633980000,"latitude":33.16,"longitude":-79.83},{"id":"iem_I_32.970_-79.670_1786636020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786636020000,"latitude":32.97,"longitude":-79.67}] |
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.