Right now
The most recent data we hold from NOAA arrived 15 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert expired on 16 September 2026 at 23:30 UTC. It is kept here as a record.
It is the 20th strongest of the 34 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 10 September 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued September 16 at 7:05PM EDT until September 16 at 7:30PM EDT by NWS Miami FL
Urban PEI: 663,122 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 16, 2026 · score 41 · 0.0 km
- July 27, 2026 · score 48 · 1.2 km
- July 12, 2026 · score 48 · 6.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 41 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 26.8080, -79.9500 |
| Nearest City | Riviera Beach (11 km) |
| Urban exposure index (PEI) | 663.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-16T23:05:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b874762c60549ba73de5ee6a016b03822c551acb.001.1 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-16T23:05:00.000Z.
First archived: 2026-09-16T23:10:03.888Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-16T23:21:46.530Z · data_change
Index 41 → 41; severity medium → medium; version 5 → 5.
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 |
| Headline | Special Marine Warning issued September 16 at 7:05PM EDT until September 16 at 7:30PM EDT by NWS Miami FL |
| Expires | 2026-09-16T19:30:00-04:00 |
| 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 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.
Review the area, threshold and delivery channel in your account.
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