This alert expired on 12 August 2026 at 23:15 UTC. It is kept here as a record.
It is the 91st strongest of the 138 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 4 August 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 12 at 6:19PM EDT until August 12 at 7:15PM EDT by NWS Melbourne FL
An estimated 351,222 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 3, 2026 · score 43 · 2.1 km
- June 25, 2026 · score 43 · 3.6 km
- July 20, 2026 · score 43 · 5.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 82 % 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 | 82% |
| Coordinates | 27.8380, -80.4040 |
| Nearest City | Sebastian (7 km) |
| Population Exposed | 351.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T22:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.24d495692ab136f55095e8c41310aac951100ab7.001.1 |
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 August 12 at 6:19PM EDT until August 12 at 7:15PM EDT by NWS Melbourne FL |
| Expires | 2026-08-12T19:15:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 1 WSW Stuart |
| Iem County | AMZ555 |
| Iem State | FL |
| Iem Wfo | MLB |
| Iem Remark | The mesonet station SLE-SF measured a peak wind gust of 43MPH/37KT from the south at 2:45 PM. |
| MergedSources | [{"id":"iem_M_27.190_-80.260_1786560300000","source":"iem","severity":"low","severityValue":25,"timestamp":1786560300000,"latitude":27.19,"longitude":-80.26}] |
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.