This alert expired on 18 July 2026 at 00:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 19 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 17 at 6:59PM EDT until July 17 at 8:00PM EDT by NWS Melbourne FL
An estimated 403,003 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 15, 2026 · score 43 · 0.3 km
- March 17, 2026 · score 43 · 3.8 km
- July 17, 2026 · score 43 · 4.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 27.1366, -80.4877 |
| Nearest City | Port Saint Lucie (22 km) |
| Population Exposed | 403.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-17T22:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.fc6781a838ce366d116f50582f22942a |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Sebastian Inlet to Jupiter Inlet 0-20 nm; Lake Okeechobee |
| Headline | Special Marine Warning issued July 17 at 6:59PM EDT until July 17 at 8:00PM EDT by NWS Melbourne FL |
| Expires | 2026-07-17T20:00:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fc6781a838ce366d116f50582f22942a59aedc63.001.1","noaa_urn:oid:2.49.0.1.840.0.26a8d22e223a01df8bf6850b6a3d09d6f9b57225.001.1"] |
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 43/100, near Port Saint Lucie (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.