This alert expired on 20 June 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 33 recorded within 20 km of this point since 16 March 2026 — 12 others scored the same. The last comparable one was on 19 June 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 5:45PM EDT until June 20 at 6:30PM EDT by NWS Miami FL
An estimated 727,086 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 16, 2026 · score 48 · 2.1 km
- March 16, 2026 · score 48 · 6.2 km
- August 29, 2026 · score 48 · 8.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 83 % 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) | 48 / 100 |
| Our confidence | 83% |
| Coordinates | 27.0481, -80.0843 |
| Nearest City | Jupiter (13 km) |
| Population Exposed | 727.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T21:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.bfaed12f7d3ce8de9134a178cc676fca |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM; Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM; Sebastian Inlet to Jupiter Inlet 0-20 nm; Sebastian Inlet to Jupiter Inlet 20-60 nm |
| Headline | Special Marine Warning issued June 20 at 5:45PM EDT until June 20 at 6:30PM EDT by NWS Miami FL |
| Expires | 2026-06-20T18:30:00-04:00 |
| SenderName | NWS Miami FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bfaed12f7d3ce8de9134a178cc676fca1c3d1fa3.001.1","noaa_urn:oid:2.49.0.1.840.0.487c5cad8f5362953428ac7486c088967525223c.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 39 |
| Iem Unit | MPH |
| Iem City | 4 WSW Saint Lucie Nucle |
| Iem County | St. Lucie |
| Iem State | FL |
| Iem Wfo | MLB |
| Iem Remark | The mesonet station K4ZZR Port St. Lucie measured a peak wind gust of 39MPH/34KT from the north at 4:24 PM. |
| MergedSources | [{"id":"iem_G_27.270_-80.270_1781987040000","source":"iem","severity":"low","severityValue":25,"timestamp":1781987040000,"latitude":27.27,"longitude":-80.27}] |
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 48/100, near Jupiter (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.