Right now
The most recent data we hold from NOAA arrived 11 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 21 June 2026 at 01:15 UTC. It is kept here as a record.
It is the 6th strongest of the 18 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 20 June 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 8:09PM EDT until June 20 at 9:15PM EDT by NWS Jacksonville FL
Nearby, since 16 March 2026
- July 26, 2026 · score 39 · 16.3 km
- June 18, 2026 · score 22 · 24.5 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 30.5562, -80.9299 |
| Nearest City | Jacksonville Beach (53 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-21T00:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.f772f795934c91e6ab7de167544884db |
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: 2026-06-21T00:09:00.000Z.
First archived: 2026-06-21T00:50:44.471Z. 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 | 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; Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM |
| Headline | Special Marine Warning issued June 20 at 8:09PM EDT until June 20 at 9:15PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-20T21:15:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f772f795934c91e6ab7de167544884dbc22c6347.001.1","noaa_urn:oid:2.49.0.1.840.0.0ea47ba521f68c6dae986e491b14c2d61d0f1378.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | 3 SSE Kingsland |
| Iem County | Camden |
| Iem State | GA |
| Iem Wfo | JAX |
| Iem Remark | Mesonet station GA356 I-95 At Camden Welcome Center measured a gust of 44 mph. |
| MergedSources | [{"id":"iem_G_30.330_-81.520_1781993820000","source":"iem","severity":"low","severityValue":25,"timestamp":1781993820000,"latitude":30.33,"longitude":-81.52},{"id":"iem_G_30.750_-81.650_1781995260000","source":"iem","severity":"low","severityValue":25,"timestamp":1781995260000,"latitude":30.75,"longitude":-81.65}] |
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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