This alert expired on 29 August 2026 at 07:45 UTC. It is kept here as a record.
It is the 8th strongest of the 40 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Special Marine Warning issued August 29 at 3:10AM EDT until August 29 at 3:45AM EDT by NWS Charleston SC
An estimated 94,339 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 29, 2026 · score 63 · 6.5 km
- August 28, 2026 · score 39 · 6.7 km
- June 21, 2026 · score 39 · 6.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 82% |
| Coordinates | 32.3637, -80.4213 |
| Nearest City | Hilton Head (35 km) |
| Population Exposed | 94.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-29T07:10:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Edisto Beach SC to Savannah GA out 20 NM |
| Headline | Special Marine Warning issued August 29 at 3:10AM EDT until August 29 at 3:45AM EDT by NWS Charleston SC |
| Expires | 2026-08-29T03:45:00-04:00 |
| 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 39/100, near Hilton Head (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.