This alert expired on 24 June 2026 at 00:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 6 detections recorded within 20 km of this point since 12 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 June 23 at 7:58PM EDT until June 23 at 8:30PM EDT by NWS Jacksonville FL
An estimated 45,864 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 13, 2026 · score 34 · 7.0 km
- May 12, 2026 · score 39 · 17.3 km
- March 16, 2026 · score 22 · 17.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 78 % 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) | 34 / 100 |
| Our confidence | 78% |
| Coordinates | 29.0600, -80.4685 |
| Nearest City | Edgewater (43 km) |
| Population Exposed | 45.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-23T23:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.233b99224b070a530b495b96743a98c5 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Waters from St. Augustine to Flagler Beach FL from 20 to 60 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; Volusia-Brevard County Line to Sebastian Inlet 0-20 nm; Sebastian Inlet to Jupiter Inlet 0-20 nm |
| Headline | Special Marine Warning issued June 23 at 7:58PM EDT until June 23 at 8:30PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-23T20:30:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.233b99224b070a530b495b96743a98c5670b7356.002.1","noaa_urn:oid:2.49.0.1.840.0.202e6d6c52bb4727b19eb7780318abd3513b0c14.001.1","noaa_urn:oid:2.49.0.1.840.0.5ab2afb98ad589dd64f539e7d846f331ad040057.001.1"] |
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.
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.