This alert expired on 21 June 2026 at 01:45 UTC. It is kept here as a record.
No stronger detection stands among the 24 recorded within 20 km of this point since 15 March 2026 — 6 others scored the same. The last comparable one was on 3 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 8:53PM EDT until June 20 at 9:45PM EDT by NWS Miami FL
An estimated 1,543,501 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 28, 2026 · score 52 · 7.3 km
- March 15, 2026 · score 52 · 10.8 km
- June 1, 2026 · score 48 · 11.9 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 79 % 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 | 79% |
| Coordinates | 25.3627, -80.3053 |
| Nearest City | Leisure City (20 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T00:53:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.02037d1968bd2b00d82370f6cb7869d5c030a5eb.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Biscayne Bay; Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM |
| Headline | Special Marine Warning issued June 20 at 8:53PM EDT until June 20 at 9:45PM EDT by NWS Miami FL |
| Expires | 2026-06-20T21:45:00-04:00 |
| SenderName | NWS Miami FL |
| HasExactCoords | true |
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 52/100, near Leisure City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.