Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 6 September 2026 at 22:30 UTC. It is kept here as a record.
It is the 16th strongest of the 16 detections recorded within 20 km of this point since 10 May 2026. The last comparable one was on 4 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued September 6 at 5:36PM EDT until September 6 at 6:30PM EDT by NWS Melbourne FL
An estimated 351,222 people live within 50 km of this point.
Nearby, since 10 May 2026
- July 26, 2026 · score 43 · 1.2 km
- August 4, 2026 · score 43 · 2.6 km
- June 24, 2026 · score 43 · 5.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 84 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 84% |
| Coordinates | 27.6808, -80.7273 |
| Nearest City | Sebastian (30 km) |
| Population Exposed | 351.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-06T21:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.54ef5f0e917f645b52cb2cab9d852bc00079b660.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Volusia-Brevard County Line to Sebastian Inlet 0-20 nm; Lake Okeechobee |
| Headline | Special Marine Warning issued September 6 at 5:36PM EDT until September 6 at 6:30PM EDT by NWS Melbourne FL |
| Expires | 2026-09-06T18:30:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.54ef5f0e917f645b52cb2cab9d852bc00079b660.001.1","noaa_urn:oid:2.49.0.1.840.0.b52eaa5cd1e8288cb8bc3633c162f4882d675756.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 41 |
| Iem Unit | MPH |
| Iem City | 11 ENE Avon Park |
| Iem County | Polk |
| Iem State | FL |
| Iem Wfo | TBW |
| Iem Remark | AWOS station KAGR 11 ENE Avon Park. |
| MergedSources | [{"id":"iem_G_27.650_-81.330_1788724500000","source":"iem","severity":"low","severityValue":25,"timestamp":1788724500000,"latitude":27.65,"longitude":-81.33}] |
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.
Want to know when something happens near Sebastian?
Calamity.live data shows a weather event with CalamityScore 37/100, near Sebastian (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.