This alert expired on 17 June 2026 at 01:35 UTC. It is kept here as a record.
It is the 44th strongest of the 76 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 16 at 9:26PM EDT until June 16 at 9:30PM EDT by NWS Jacksonville FL
An estimated 1,157,678 people live within 50 km of this point.
Nearby, since 8 March 2026
- July 15, 2026 · score 52 · 2.9 km
- June 15, 2026 · score 52 · 5.4 km
- June 19, 2026 · score 52 · 7.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 80 % 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) | 46 / 100 |
| Our confidence | 80% |
| Coordinates | 30.3686, -81.2314 |
| Nearest City | Jacksonville Beach (18 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-17T01:26:00.000Z |
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 16 at 9:26PM EDT until June 16 at 9:30PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-16T21:35:00-04:00 |
| 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.
Calamity.live data shows a weather event with CalamityScore 46/100, near Jacksonville Beach (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.