This alert expired on 16 March 2026 at 20:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 15 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 15 March 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 3:34PM EDT until March 16 at 4:30PM EDT by NWS Jacksonville FL
Nearby, since 15 March 2026
- March 15, 2026 · score 22 · 5.2 km
- June 18, 2026 · score 39 · 17.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 63 % 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 | 63% |
| Coordinates | 30.3515, -80.7146 |
| Nearest City | Jacksonville Beach (65 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-16T19:34:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3f257dbb27f63ce2477e1f8ff8b035e678b01e4c.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; Coastal waters from St. Augustine to Flagler Beach FL out 20 NM; Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 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 16 at 3:34PM EDT until March 16 at 4:30PM EDT by NWS Jacksonville FL |
| Expires | 2026-03-16T16:30:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | 68 |
| Spc Location | 1 ENE Fort Caroline |
| Spc County | Duval |
| Spc State | FL |
| Spc Comments | Mesonet WXFlow station XJAK Jacksonville measured a gust of 68 mph. (JAX) |
| MergedSources | [{"id":"spc_wind_30.39_-81.48_128","source":"spc","severity":"medium","severityValue":45,"timestamp":1773687960000,"latitude":30.39,"longitude":-81.48}] |
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.