This alert expired on 8 August 2026 at 19:30 UTC. It is kept here as a record.
No stronger detection stands among the 66 recorded within 20 km of this point since 16 March 2026 — 39 others scored the same. The last comparable one was on 4 August 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 8 at 2:25PM EDT until August 8 at 3:30PM EDT by NWS Jacksonville FL
An estimated 1,236,062 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 10, 2026 · score 52 · 2.6 km
- May 11, 2026 · score 52 · 7.6 km
- August 12, 2026 · score 52 · 7.8 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 80 % 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 30.1906, -81.3608 |
| Nearest City | Palm Valley (3 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-08T18:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.6ef4764236a10aa31e6a44750c2e5097 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM; Coastal waters from St. Augustine to Flagler Beach FL out 20 NM; Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM |
| Headline | Special Marine Warning issued August 8 at 2:25PM EDT until August 8 at 3:30PM EDT by NWS Jacksonville FL |
| Expires | 2026-08-08T15:30:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6ef4764236a10aa31e6a44750c2e5097dff9978c.001.1","noaa_urn:oid:2.49.0.1.840.0.744f5b3418cef64eb1ab75c6977f9ed2b0cd1da6.001.1"] |
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 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.
Want to know when something happens near Palm Valley?
Calamity.live data shows a weather event with CalamityScore 52/100, near Palm Valley (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.