This alert expired on 16 March 2026 at 02:30 UTC. It is kept here as a record.
It is the 6th strongest of the 45 detections recorded within 20 km of this point since 16 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 March 15 at 9:31PM EDT until March 15 at 10:30PM EDT by NWS Jacksonville FL
An estimated 16,157 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 12, 2026 · score 39 · 14.0 km
- July 12, 2026 · score 39 · 15.6 km
- July 11, 2026 · score 39 · 15.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 87 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 34 / 100 |
| Our confidence | 87% |
| Coordinates | 31.1353, -81.2020 |
| Nearest City | Brunswick (27 km) |
| Population Exposed | 16.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T01:31:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a33c0f02a2c148ac61207df0e48fe45b74af9a83.001.1 |
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 15 at 9:31PM EDT until March 15 at 10:30PM EDT by NWS Jacksonville FL |
| Expires | 2026-03-15T22:30:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 45 |
| Iem Unit | MPH |
| Iem City | 1 NNE Jekyll Island |
| Iem County | Glynn |
| Iem State | GA |
| Iem Wfo | JAX |
| Iem Remark | Mesonet station XJEK Jekyll Island. |
| MergedSources | [{"id":"iem_G_30.620_-81.470_1773622500000","source":"iem","severity":"low","severityValue":25,"timestamp":1773622500000,"latitude":30.62,"longitude":-81.47},{"id":"iem_G_31.050_-81.410_1773623880000","source":"iem","severity":"low","severityValue":25,"timestamp":1773623880000,"latitude":31.05,"longitude":-81.41}] |
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.
Want to know when something happens near Brunswick?
Calamity.live data shows a weather event with CalamityScore 34/100, near Brunswick (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.