This alert expired on 30 August 2026 at 18:00 UTC. It is kept here as a record.
No stronger detection stands among the 20 recorded within 20 km of this point since 16 March 2026 — 10 others scored the same. The last comparable one was on 6 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued August 30 at 12:06PM EDT until August 30 at 2:00PM EDT by NWS Charleston SC
An estimated 213,926 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 11, 2026 · score 43 · 1.0 km
- August 6, 2026 · score 43 · 18.2 km
- July 30, 2026 · score 43 · 22.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 82% |
| Coordinates | 32.4833, -79.6067 |
| Nearest City | Mount Pleasant (42 km) |
| Population Exposed | 213.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-30T16:06:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from South Santee River to Edisto Beach SC out 20 NM; Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM |
| Headline | Special Marine Warning issued August 30 at 12:06PM EDT until August 30 at 2:00PM EDT by NWS Charleston SC |
| Expires | 2026-08-30T14:00:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 43/100, near Mount Pleasant (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.