Right now
The most recent data we hold from NOAA arrived 4 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 16 March 2026 at 20:30 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 16 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 3:06PM EDT until March 16 at 4:30PM EDT by NWS Charleston SC
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.58/1 |
| Coordinates | 29.9136, -80.4255 |
| Nearest City | Palm Coast (84 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-03-16T19:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.82ac5ee9e5b0e8983578d2aa25d8aa7b |
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: 2026-03-16T19:06:00.000Z.
First archived: 2026-03-16T19:22:24.235Z. 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 South Santee River to Edisto Beach SC out 20 nm; Coastal waters from Edisto Beach SC to Savannah GA out 20 nm; Waters from Savannah GA to Altamaha Sound GA extending from 20 nm to 60 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; 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 and 3 more areas |
| Headline | Special Marine Warning issued March 16 at 3:06PM EDT until March 16 at 4:30PM EDT by NWS Charleston SC |
| Expires | 2026-03-16T16:30:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.82ac5ee9e5b0e8983578d2aa25d8aa7b9ef0c7fe.001.1","noaa_urn:oid:2.49.0.1.840.0.1e9225f138036b5cbf52c2816755b3fd9f8c698f.001.1","noaa_urn:oid:2.49.0.1.840.0.c814dad0196bd6fd16a670a23c6003d2751cc603.001.1","noaa_urn:oid:2.49.0.1.840.0.45cf1fa3a131907f55e736ff54bb480e9a222c9c.001.1","noaa_urn:oid:2.49.0.1.840.0.db825bd10a221b6e584bf3e0a77669bf4063423d.001.1","noaa_urn:oid:2.49.0.1.840.0.c66d4d7bd6ddd2b45c7472d5698739a9de081e04.001.1"] |
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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