This alert expired on 16 March 2026 at 01:00 UTC. It is kept here as a record.
It is the 5th strongest of the 17 detections recorded within 20 km of this point since 15 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 15 at 7:30PM EDT until March 15 at 9:00PM EDT by NWS Jacksonville FL
An estimated 82,893 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 5, 2026 · score 43 · 15.8 km
- July 13, 2026 · score 39 · 16.2 km
- March 16, 2026 · score 43 · 16.2 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 88 % 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 | 88% |
| Coordinates | 29.7076, -80.7688 |
| Nearest City | Palm Coast (45 km) |
| Population Exposed | 82.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T23:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.1b15d4c91b8e14573fb8ae41c630d4bd |
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; Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM; 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 and 1 more areas |
| Headline | Special Marine Warning issued March 15 at 7:30PM EDT until March 15 at 9:00PM EDT by NWS Jacksonville FL |
| Expires | 2026-03-15T21:00:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1b15d4c91b8e14573fb8ae41c630d4bd1626b7c9.001.1","noaa_urn:oid:2.49.0.1.840.0.c99b1e3769daa71e6ce7930605afc6b70316889e.001.1","noaa_urn:oid:2.49.0.1.840.0.f847e709224bbf9a321b62993237825100c096b3.001.1","noaa_urn:oid:2.49.0.1.840.0.20c049217725ee4d1874af7955d80d0b790ad985.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 49 |
| Iem Unit | MPH |
| Iem City | 2 E Palm Coast |
| Iem County | Flagler |
| Iem State | FL |
| Iem Wfo | JAX |
| Iem Remark | Mesonet station 1334W 1.6 E Palm Coast (WEATHERSTEM). |
| MergedSources | [{"id":"iem_G_29.920_-81.330_1773617220000","source":"iem","severity":"low","severityValue":25,"timestamp":1773617220000,"latitude":29.92,"longitude":-81.33},{"id":"iem_G_29.570_-81.190_1773615600000","source":"iem","severity":"low","severityValue":25,"timestamp":1773615600000,"latitude":29.57,"longitude":-81.19}] |
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.
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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.