Right now
The most recent data we hold from NOAA arrived 53 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 20 June 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 156 recorded within 20 km of this point since 8 March 2026 — 81 others scored the same. The last comparable one was on 19 June 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 6:14PM EDT until June 20 at 7:00PM EDT by NWS Jacksonville FL
Urban PEI: 1,254,030 within a heuristic 50 km radius; not unique people.
Nearby, since 8 March 2026
- July 30, 2026 · score 52 · 0.7 km
- June 23, 2026 · score 52 · 2.8 km
- March 12, 2026 · score 52 · 4.1 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 52 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 30.3787, -81.4175 |
| Nearest City | Jacksonville Beach (10 km) |
| Urban exposure index (PEI) | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T22:14:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.1bd4609bcb3182720efb63d7a5d5007458483079.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-20T22:14:00.000Z.
First archived: 2026-06-20T22:50:53.665Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
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 20 at 6:14PM EDT until June 20 at 7:00PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-20T19:00:00-04:00 |
| 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 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.
Review the area, threshold and delivery channel in your account.
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