This alert expired on 18 May 2026 at 22:06 UTC. It is kept here as a record.
No stronger detection stands among the 57 recorded within 20 km of this point since 16 March 2026 — 29 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 18 at 5:56PM EDT until May 18 at 6:00PM EDT by NWS Tampa Bay Ruskin FL
An estimated 2,034,921 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 25, 2026 · score 52 · 3.1 km
- July 13, 2026 · score 52 · 3.7 km
- June 26, 2026 · score 52 · 4.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 84 % 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) | 52 / 100 |
| Our confidence | 84% |
| Coordinates | 27.9500, -82.6514 |
| Nearest City | Safety Harbor (6 km) |
| Population Exposed | 2.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T21:56:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e70f52a732ff0d2d8b0d3b44205cb1baebe4d59b.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tampa Bay waters |
| Headline | Special Marine Warning issued May 18 at 5:56PM EDT until May 18 at 6:00PM EDT by NWS Tampa Bay Ruskin FL |
| Expires | 2026-05-18T18:06:00-04:00 |
| SenderName | NWS Tampa Bay Ruskin FL |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | 2 WNW Feather Sound |
| Iem County | Pinellas |
| Iem State | FL |
| Iem Wfo | TBW |
| Iem Remark | ASOS station KPIE St Pete-Clearwater Intl. |
| MergedSources | [{"id":"iem_M_27.910_-82.690_1779139920000","source":"iem","severity":"low","severityValue":25,"timestamp":1779139920000,"latitude":27.91,"longitude":-82.69}] |
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 52/100, near Safety Harbor (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.