Right now
The most recent data we hold from NOAA arrived 7 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 00:00 UTC. It is kept here as a record.
It is the 22nd strongest of the 34 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 7:39PM EDT until June 20 at 8:00PM EDT by NWS Jacksonville FL
Urban PEI: 112,938 within a heuristic 50 km radius; not unique people.
Nearby, since 8 March 2026
- June 20, 2026 · score 52 · 9.6 km
- August 12, 2026 · score 52 · 12.9 km
- June 20, 2026 · score 52 · 14.3 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 30.6035, -81.2200 |
| Nearest City | St. Marys (35 km) |
| Urban exposure index (PEI) | 112.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T23:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.78be4a11bc4c6e9a16bf49878d5040aa |
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: 2026-06-20T23:39:00.000Z.
First archived: 2026-06-20T23:48:49.741Z. 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; Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM; Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM |
| Headline | Special Marine Warning issued June 20 at 7:39PM EDT until June 20 at 8:00PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-20T20:00:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.78be4a11bc4c6e9a16bf49878d5040aa806ecfd4.001.1","noaa_urn:oid:2.49.0.1.840.0.9ddacea1a7ae1d28aea50b0aa97dab7147dc2b0c.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_30.220_-81.670_1781995980000","source":"iem","severity":"low","severityValue":25,"timestamp":1781995980000,"latitude":30.22,"longitude":-81.67},{"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.
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