This alert expired on 13 June 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 136 recorded within 20 km of this point since 8 March 2026 — 77 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 13 at 5:54PM EDT until June 13 at 7:00PM EDT by NWS Jacksonville FL
An estimated 1,122,771 people live within 50 km of this point.
Nearby, since 8 March 2026
- June 23, 2026 · score 52 · 1.0 km
- August 8, 2026 · score 52 · 4.8 km
- July 13, 2026 · score 52 · 5.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 30.5400, -81.4650 |
| Nearest City | St. Marys (23 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-13T21:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.90db047e3eff4ed1f598954b691c21b18233663c.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM |
| Headline | Special Marine Warning issued June 13 at 5:54PM EDT until June 13 at 7:00PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-13T19:00:00-04:00 |
| SenderName | NWS Jacksonville FL |
| 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.
Want to know when something happens near St. Marys?
Calamity.live data shows a weather event with CalamityScore 52/100, near St. Marys (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.