This alert expired on 16 March 2026 at 01:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 13 detections recorded within 20 km of this point since 16 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 15 at 8:19PM EDT until March 15 at 9:15PM EDT by NWS Jacksonville FL
Nearby, since 16 March 2026
- June 18, 2026 · score 22 · 11.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 58 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 58% |
| Coordinates | 30.6631, -80.8563 |
| Nearest City | Jacksonville Beach (66 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-16T00:19:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.f0284b1af981e080d076fc7cd20d841a |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM; Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM; Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM; Coastal waters from St. Augustine to Flagler Beach FL out 20 NM; Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM; Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM |
| Headline | Special Marine Warning issued March 15 at 8:19PM EDT until March 15 at 9:15PM EDT by NWS Jacksonville FL |
| Expires | 2026-03-15T21:15:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f0284b1af981e080d076fc7cd20d841ae1eb180e.001.1","noaa_urn:oid:2.49.0.1.840.0.1b15d4c91b8e14573fb8ae41c630d4bd1626b7c9.001.1"] |
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 8 March 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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.