This alert expired on 20 July 2026 at 18:45 UTC. It is kept here as a record.
It is the 355th strongest of the 419 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 17 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 20 at 1:48PM EDT until July 20 at 2:45PM EDT by NWS Melbourne FL
An estimated 351,222 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 17, 2026 · score 43 · 4.6 km
- August 12, 2026 · score 43 · 5.2 km
- June 3, 2026 · score 43 · 5.6 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 81 % 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 | 81% |
| Coordinates | 27.8700, -80.4429 |
| Nearest City | Sebastian (6 km) |
| Population Exposed | 351.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T17:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a2a819d3687129b3d01f2ee9fdcc167b30c83944.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Volusia-Brevard County Line to Sebastian Inlet 0-20 nm; Sebastian Inlet to Jupiter Inlet 0-20 nm |
| Headline | Special Marine Warning issued July 20 at 1:48PM EDT until July 20 at 2:45PM EDT by NWS Melbourne FL |
| Expires | 2026-07-20T14:45:00-04:00 |
| SenderName | NWS Melbourne 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 43/100, near Sebastian (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.