This alert expired on 15 June 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 21 recorded within 20 km of this point since 31 May 2026 — 11 others scored the same. The last comparable one was on 14 June 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 14 at 8:04PM EDT until June 14 at 8:45PM EDT by NWS Charleston SC
An estimated 162,918 people live within 50 km of this point.
Nearby, since 31 May 2026
- June 18, 2026 · score 43 · 3.9 km
- June 21, 2026 · score 43 · 7.4 km
- June 29, 2026 · score 43 · 14.2 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 81 % 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 | 81% |
| Coordinates | 31.6360, -81.0927 |
| Nearest City | Wilmington Island (42 km) |
| Population Exposed | 162.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-15T00:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.3a9815df17d02241d3bf05454453d5d5 |
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; Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM; Coastal waters from Edisto Beach SC to Savannah GA out 20 NM; Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary; Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM; Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM |
| Headline | Special Marine Warning issued June 14 at 8:04PM EDT until June 14 at 8:45PM EDT by NWS Charleston SC |
| Expires | 2026-06-14T20:45:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3a9815df17d02241d3bf05454453d5d57bdd6f7c.001.1","noaa_urn:oid:2.49.0.1.840.0.b14627a6e252bec7206bf1a2e4393e19327d5e02.001.1","noaa_urn:oid:2.49.0.1.840.0.bae5c612e8afe35857e24eceea3d5b1ceadfbd40.001.1"] |
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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.