This alert expired on 13 August 2026 at 22:21 UTC. It is kept here as a record.
It is the 5th strongest of the 13 detections recorded within 20 km of this point since 23 May 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 13 at 6:11PM EDT until August 13 at 6:15PM EDT by NWS Miami FL
An estimated 17,690 people live within 50 km of this point.
Nearby, since 23 May 2026
- July 10, 2026 · score 34 · 1.1 km
- June 12, 2026 · score 34 · 4.9 km
- July 15, 2026 · score 39 · 6.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 78 % 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) | 34 / 100 |
| Our confidence | 78% |
| Coordinates | 25.8388, -81.3550 |
| Nearest City | Marco Island (38 km) |
| Population Exposed | 17.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T22:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c2617013f235b2ee0ec3b0e27e624ab4690b4da7.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM; Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM |
| Headline | Special Marine Warning issued August 13 at 6:11PM EDT until August 13 at 6:15PM EDT by NWS Miami FL |
| Expires | 2026-08-13T18:21:00-04:00 |
| SenderName | NWS Miami 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.
Want to know when something happens near Marco Island?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.