This alert expired on 20 June 2026 at 13:00 UTC. It is kept here as a record.
No stronger detection stands among the 46 recorded within 20 km of this point since 15 March 2026 — 10 others scored the same. The last comparable one was on 18 June 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 20 at 8:24AM EDT until June 20 at 9:00AM EDT by NWS Tampa Bay Ruskin FL
An estimated 527,045 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 17, 2026 · score 48 · 3.8 km
- June 28, 2026 · score 43 · 4.4 km
- July 22, 2026 · score 48 · 5.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 86% |
| Coordinates | 26.7780, -82.1380 |
| Nearest City | Punta Gorda Isles (17 km) |
| Population Exposed | 527.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T12:24:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Charlotte Harbor and Pine Island Sound |
| Headline | Special Marine Warning issued June 20 at 8:24AM EDT until June 20 at 9:00AM EDT by NWS Tampa Bay Ruskin FL |
| Expires | 2026-06-20T09:00:00-04:00 |
| SenderName | NWS Tampa Bay Ruskin FL |
| HasExactCoords | true |
| Iem TypeSummary | W |
| Iem City | 7 E Boca Grande |
| Iem County | GMZ836 |
| Iem State | FL |
| Iem Wfo | TBW |
| Iem Remark | Public pictures and video sent in showing a waterspout in Charlotte Harbor this morning. |
| MergedSources | [{"id":"iem_W_26.740_-82.150_1781958300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781958300000,"latitude":26.74,"longitude":-82.15}] |
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 48/100, near Punta Gorda Isles (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.