This alert expired on 13 July 2026 at 19:50 UTC. It is kept here as a record.
It is the 4th strongest of the 18 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 13 at 3:40PM EDT until July 13 at 3:45PM EDT by NWS Jacksonville FL
An estimated 82,893 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 23, 2026 · score 39 · 4.0 km
- June 21, 2026 · score 43 · 19.7 km
- June 19, 2026 · score 43 · 23.4 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 81 % 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) | 39 / 100 |
| Our confidence | 81% |
| Coordinates | 29.8507, -80.7999 |
| Nearest City | Palm Coast (50 km) |
| Population Exposed | 82.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-13T19:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.6ed29cca01b0adef788d08e6c37f62cb |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; Flagler Beach to Volusia-Brevard County Line 0-20 nm; Coastal waters from St. Augustine to Flagler Beach FL out 20 NM; Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM |
| Headline | Special Marine Warning issued July 13 at 3:40PM EDT until July 13 at 3:45PM EDT by NWS Jacksonville FL |
| Expires | 2026-07-13T15:50:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6ed29cca01b0adef788d08e6c37f62cb887a5cf3.001.1","noaa_urn:oid:2.49.0.1.840.0.9afd41f4a259026cb2f85df12d452b07c6933850.001.1","noaa_urn:oid:2.49.0.1.840.0.11ee7e37d114969515b3f5931351c9f47a300e6a.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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.