This alert expired on 12 March 2026 at 15:15 UTC. It is kept here as a record.
No stronger detection stands among the 30 recorded within 20 km of this point since 12 March 2026 — 11 others scored the same.
What the source measured
NOAA reported: Special Marine Warning issued March 12 at 10:10AM EDT until March 12 at 11:15AM EDT by NWS Jacksonville FL
An estimated 50,612 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 13, 2026 · score 32 · 4.1 km
- August 12, 2026 · score 39 · 13.0 km
- July 12, 2026 · score 39 · 15.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 77 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 39 / 100 |
| Our confidence | 77% |
| Coordinates | 31.0262, -81.4529 |
| Nearest City | Brunswick (14 km) |
| Population Exposed | 50.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-12T14:10:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_1d9de4495e8884e739fba8e90845bd3b6bd3e60e_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 |
| Headline | Special Marine Warning issued March 12 at 10:10AM EDT until March 12 at 11:15AM EDT by NWS Jacksonville FL |
| Expires | 2026-03-12T11:15:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 39/100, near Brunswick (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.