This alert expired on 31 August 2026 at 22:30 UTC. It is kept here as a record.
It is the 28th strongest of the 59 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 30 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued August 31 at 5:55PM EDT until August 31 at 6:30PM EDT by NWS Tampa Bay Ruskin FL
An estimated 1,982,805 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 10, 2026 · score 52 · 3.1 km
- July 17, 2026 · score 52 · 4.2 km
- July 13, 2026 · score 52 · 9.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 90 % 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) | 46 / 100 |
| Our confidence | 90% |
| Coordinates | 27.7100, -82.6760 |
| Nearest City | St. Petersburg (7 km) |
| Population Exposed | 2.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-31T21:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.982211ffdfa5e89d462970b6bd9c101183cfd30e.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tampa Bay waters; Coastal waters from Englewood to Tarpon Springs FL out 20 NM |
| Headline | Special Marine Warning issued August 31 at 5:55PM EDT until August 31 at 6:30PM EDT by NWS Tampa Bay Ruskin FL |
| Expires | 2026-08-31T18:30:00-04:00 |
| SenderName | NWS Tampa Bay Ruskin FL |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 2 ENE Saint Petersburg |
| Iem County | Pinellas |
| Iem State | FL |
| Iem Wfo | TBW |
| Iem Remark | ASOS station KSPG St Petersburg - Albert Whitted. |
| MergedSources | [{"id":"iem_M_27.770_-82.570_1788213000000","source":"iem","severity":"low","severityValue":25,"timestamp":1788213000000,"latitude":27.77,"longitude":-82.57},{"id":"iem_G_27.770_-82.630_1788213180000","source":"iem","severity":"low","severityValue":25,"timestamp":1788213180000,"latitude":27.77,"longitude":-82.63}] |
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 46/100, near St. Petersburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.