This alert expired on 21 June 2026 at 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 130 recorded within 20 km of this point since 15 March 2026 — 63 others scored the same. The last comparable one was on 20 June 2026. 24 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 21 at 4:52PM EDT until June 21 at 5:45PM EDT by NWS Melbourne FL
An estimated 326,504 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 12, 2026 · score 43 · 2.2 km
- July 20, 2026 · score 43 · 2.9 km
- July 16, 2026 · score 43 · 2.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 85% |
| Coordinates | 28.2007, -80.5516 |
| Nearest City | Melbourne (15 km) |
| Population Exposed | 326.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T20:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.05dc415c2ce2d69f38eda42677432930 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Volusia-Brevard County Line to Sebastian Inlet 0-20 nm |
| Headline | Special Marine Warning issued June 21 at 4:52PM EDT until June 21 at 5:45PM EDT by NWS Melbourne FL |
| Expires | 2026-06-21T17:45:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.05dc415c2ce2d69f38eda4267743293028608cdf.001.1","noaa_urn:oid:2.49.0.1.840.0.ad2987144dd8d783c6b76c17c9417b839fe00cf9.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | 4 ESE Port Saint John |
| Iem County | AMZ552 |
| Iem State | FL |
| Iem Wfo | MLB |
| Iem Remark | CWOP mesonet station FW0175 Merritt Island measured a wind gust of 44MPH/38KTS from the west-northwest. |
| MergedSources | [{"id":"iem_M_28.460_-80.720_1782072900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782072900000,"latitude":28.46,"longitude":-80.72}] |
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 Melbourne?
Calamity.live data shows a weather event with CalamityScore 43/100, near Melbourne (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.