This alert expired on 8 March 2026 at 21:15 UTC. It is kept here as a record.
No stronger detection stands among the 133 recorded within 20 km of this point since 8 March 2026 — 77 others scored the same. The last comparable one was on 8 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 8 at 5:05PM EDT until March 8 at 5:15PM EDT by NWS Jacksonville FL
An estimated 1,559,000 people live within 50 km of this point.
Nearby, since 8 March 2026
- July 15, 2026 · score 52 · 8.9 km
- June 21, 2026 · score 52 · 9.1 km
- March 12, 2026 · score 52 · 9.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Weather |
| Severity | medium |
| Severity Value | 50 |
| Calamity Score | 52 / 100 |
| Confidence | 85% |
| Coordinates | 30.4360, -81.3040 |
| Nearest City | Jacksonville (36 km) |
| Population Exposed | 1.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-08T21:05:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Expires | 2026-03-08T17:15:00-04:00 |
| Iem Wfo | JAX |
| Urgency | Immediate |
| AreaDesc | Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM |
| Headline | Special Marine Warning issued March 8 at 5:05PM EDT until March 8 at 5:15PM EDT by NWS Jacksonville FL |
| Iem City | 4 ENE Oceanway |
| Iem Unit | MPH |
| Certainty | Likely |
| Iem State | FL |
| Iem County | Duval |
| Iem Remark | Mesonet station AW654 JACKSONVILLE. |
| SenderName | NWS Jacksonville FL |
| Iem Magnitude | 41 |
| MergedSources | [{"id":"iem_G_30.500_-81.570_1772997000000","source":"iem","severity":"low","timestamp":1772997000000,"severityValue":25}] |
| HasExactCoords | true |
| Iem TypeSummary | G |
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 52/100, near Jacksonville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 196 scientific monitoring sources.