This alert expired on 4 August 2026 at 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 7 April 2026 — 13 others scored the same. The last comparable one was on 26 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 4 at 4:59PM EDT until August 4 at 5:45PM EDT by NWS Miami FL
An estimated 351,222 people live within 50 km of this point.
Nearby, since 7 April 2026
- July 26, 2026 · score 43 · 1.6 km
- June 24, 2026 · score 43 · 3.4 km
- July 5, 2026 · score 43 · 8.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 86 % 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 | 86% |
| Coordinates | 27.7043, -80.7271 |
| Nearest City | Sebastian (28 km) |
| Population Exposed | 351.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-04T20:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.d04786a27ebec5cd75567f4cd72b13c6 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lake Okeechobee; Volusia-Brevard County Line to Sebastian Inlet 0-20 nm |
| Headline | Special Marine Warning issued August 4 at 4:59PM EDT until August 4 at 5:45PM EDT by NWS Miami FL |
| Expires | 2026-08-04T17:45:00-04:00 |
| SenderName | NWS Miami FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d04786a27ebec5cd75567f4cd72b13c60efab9a3.001.1","noaa_urn:oid:2.49.0.1.840.0.e6cd2f03b0180eb0e1ff0cebe4f16bb6c39004a9.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 52 |
| Iem Unit | MPH |
| Iem City | 1 WNW Vero Beach |
| Iem County | Indian River |
| Iem State | FL |
| Iem Wfo | MLB |
| Iem Remark | Vero Beach Municipal Airport measured a peak wind gust of 52MPH/45KT from the northwest at 2:40 PM. |
| MergedSources | [{"id":"iem_G_27.650_-80.420_1785868800000","source":"iem","severity":"low","severityValue":25,"timestamp":1785868800000,"latitude":27.65,"longitude":-80.42}] |
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.