This alert expired on 18 July 2026 at 10:00 UTC. It is kept here as a record.
It is the 10th strongest of the 19 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 15 July 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 5:13AM EDT until July 18 at 6:00AM EDT by NWS Miami FL
An estimated 403,345 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 10, 2026 · score 43 · 8.1 km
- July 15, 2026 · score 43 · 13.9 km
- August 5, 2026 · score 48 · 15.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % 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 | 81% |
| Coordinates | 26.4734, -82.1490 |
| Nearest City | Iona (20 km) |
| Population Exposed | 403.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T09:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.42722fa89d32a76bd2df1c80727d3741 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM; Charlotte Harbor and Pine Island Sound; Coastal waters from Englewood to Tarpon Springs FL out 20 NM; Coastal waters from Bonita Beach to Englewood FL out 20 NM; Waters from Englewood to Tarpon Springs FL out 20 to 60 NM; Waters from Bonita Beach to Englewood FL out 20 to 60 NM |
| Headline | Special Marine Warning issued July 18 at 5:13AM EDT until July 18 at 6:00AM EDT by NWS Miami FL |
| Expires | 2026-07-18T06:00:00-04:00 |
| SenderName | NWS Miami FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.42722fa89d32a76bd2df1c80727d374122db8823.001.1","noaa_urn:oid:2.49.0.1.840.0.3001ef3575d236cc5779ef3bd0b96a100e5c533a.001.1"] |
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 Iona?
Calamity.live data shows a weather event with CalamityScore 43/100, near Iona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.