Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is in it.
One other detection within 20 km in the last 24 hours, 20 km from here.
This alert is in force until 12 September 2026, 00:15 UTC.
It is the 33rd strongest of the 33 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 11 at 7:11PM EDT until September 11 at 8:15PM EDT by NWS Jacksonville FL
An estimated 50,612 people live within 50 km of this point.
Nearby, since 8 March 2026
- June 15, 2026 · score 39 · 5.6 km
- August 28, 2026 · score 39 · 6.7 km
- July 8, 2026 · score 39 · 7.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 32 / 100 |
| Our confidence | 80% |
| Coordinates | 30.8367, -81.2366 |
| Nearest City | St. Marys (32 km) |
| Population Exposed | 50.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-11T23:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.6b4697dfb7be94f10c6223411f7e7b50e172a2fa.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM; Coastal waters from Fernandina Beach to St. Augustine 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 |
| Headline | Special Marine Warning issued September 11 at 7:11PM EDT until September 11 at 8:15PM EDT by NWS Jacksonville FL |
| Expires | 2026-09-11T20:15:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6b4697dfb7be94f10c6223411f7e7b50e172a2fa.001.1","noaa_urn:oid:2.49.0.1.840.0.0db24b9682ea486cd3aadb0977c43fc33e523855.001.1"] |
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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