Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
2 other detections within 20 km in the last 24 hours, the nearest 10 km from here.
This alert is in force until 11 September 2026, 23:15 UTC.
It is the 26th strongest of the 59 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 11 at 6:20PM EDT until September 11 at 7:15PM EDT by NWS Jacksonville FL
An estimated 1,067,352 people live within 50 km of this point.
Nearby, since 8 March 2026
- July 11, 2026 · score 52 · 5.2 km
- June 27, 2026 · score 52 · 6.2 km
- August 4, 2026 · score 39 · 6.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Our confidence | 80% |
| Coordinates | 30.7067, -81.3797 |
| Nearest City | St. Marys (16 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-11T22:20:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.0db24b9682ea486cd3aadb0977c43fc33e523855.001.1 |
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; 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 September 11 at 6:20PM EDT until September 11 at 7:15PM EDT by NWS Jacksonville FL |
| Expires | 2026-09-11T19:15:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0db24b9682ea486cd3aadb0977c43fc33e523855.001.1","noaa_urn:oid:2.49.0.1.840.0.9fc3950923c7f3c7e46b13f68d41d3ddf1c97287.001.1"] |
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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