This alert expired on 29 June 2026 at 20:30 UTC. It is kept here as a record.
No stronger detection stands among the 23 recorded within 20 km of this point since 31 May 2026 — 17 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 29 at 4:03PM EDT until June 29 at 4:30PM EDT by NWS Charleston SC
An estimated 186,051 people live within 50 km of this point.
Nearby, since 31 May 2026
- May 31, 2026 · score 43 · 3.5 km
- June 14, 2026 · score 43 · 5.4 km
- June 21, 2026 · score 43 · 7.2 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 79 % 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 | 79% |
| Coordinates | 31.7532, -81.0326 |
| Nearest City | Wilmington Island (28 km) |
| Population Exposed | 186.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-29T20:03:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.fee06e860616b5ab5aa5fe157a3d6ef3a42aff46.002.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary |
| Headline | Special Marine Warning issued June 29 at 4:03PM EDT until June 29 at 4:30PM EDT by NWS Charleston SC |
| Expires | 2026-06-29T16:30:00-04:00 |
| 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 Wilmington Island (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.